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Article
Chemistry, Physical
Yutong Xiao et al.
Summary: Transition metal phosphides (TMPs) are promising alternatives to expensive cocatalysts. In this study, the structure-activity relationships between Ni2P and g-C3N4 were explored, revealing that Ni2P can substantially enhance the photocatalytic activity of g-C3N4 for hydrogen evolution reaction (HER). Loading 3% Ni2P on g-C3N4 through ball milling resulted in a 9-fold increase in HER performance compared to pristine g-C3N4. Ni2P played a dual role as trapping sites for photoinduced electrons and reactive centers for hydrogen evolution due to its high work function and low HER overpotential. This work provides insights into the design of efficient TMPs for enhanced HER through simple synthesis methods.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Yunyun He et al.
Summary: Binary multi-scale CdS/ZnO heterogeneous architectures composed of 0D CdS nanoparticles on 3D flower-like structures formed by 2D ZnO nanoflakes were successfully fabricated. The optimized CZ-3 showed a H2 generation rate of 15.682 mmol g-1 h-1 under simulated solar irradiation, which was 15.25, 101.17, and 39.70 times higher than pure ZnO, bare CdS, and physical mixture, respectively. The photocatalytic oxidation kinetics rate constant of optimized CZ-3 in Congo red degradation was measured to be 0.05686 min-1 under simulated sunlight, which was 7.21, 9.07, and 5.82 times higher than pure ZnO, pure CdS, and physical mixture, respectively. The improved photocatalytic performance of CdS/ZnO composite was attributed to the synergetic multi-scale heteroarchitecture and interfacial heterojunction. A proposed photocatalytic electron transfer mechanism is based on perfect band matching and free radical experiments.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Qiyu Jin et al.
Summary: ZnAl2O4 and sulfur-doped g-C3N4 (SCN) S-Scheme heterojunctions were prepared for efficient removal of malachite green (MG) using an in situ self-assembly method. The composite structure consisted of ZnAl2O4 nanoscale particles loaded onto SCN nanosheets. The 30 wt% ZnAl2O4/SCN composite showed the best photocatalytic properties, with a 98.3% degradation of MG after 120 min of simulated solar illumination. The primary active substance in the MG photodegradation was identified as photo-induced center dot O-2. This study provides new possible strategies for the removal of MG contaminants in water.
Article
Environmental Sciences
Peiguo Zhou et al.
Summary: Finding a cheap and stable Fe-based catalyst with good performance is an urgent task in the field of heterogeneous Fenton. In this study, the optimum heterogeneous Fenton granular catalyst was selected by investigating the loading conditions and granulation conditions of attapulgite. The results showed that the catalyst had excellent degradation efficiency for dyes and good recyclability.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Materials Science, Multidisciplinary
M. M. Gomaa et al.
Summary: NiO/ZnO core-shell nanoflakes structures were fabricated using a combination of a chemical bath deposition route and a metal-organic chemical vapor deposition technique. Varying the growth time of ZnO on the surface of NiO nanoflakes affected the surface property and photocatalytic activity of the core-shell nanostructures. The core-shell architecture exhibited enhanced photocatalytic activity due to the formation of a p-n heterojunction between ZnO and NiO.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Parmeshwar Lal Meena et al.
Summary: g-C3N4/ZnO hybrid nanostructures were synthesized by mixing urea and zinc acetate as precursors via grinding and then microwave-assisted dehydration followed by a low-temperature calcination process. The structural and textural properties of the prepared samples were investigated, and the effect of ZnO on the photocatalytic activity of g-C3N4 was studied. The g-C3N4/ZnO (20%) composite exhibited the greatest degradation efficiency in comparison to other fabricated g-C3N4/ZnO hybrid nanostructures. The present work provides an efficient and facile synthetic approach for the construction of g-C3N4/ZnO hybrid nanostructures which can be employed effectively for the photocatalytic degradation of organic water pollutants.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Yazhuo Zheng et al.
Summary: The construction of a Schottky junction using 0D Ti2CO2 nanoclusters and 2D g-C3N4 (TCO/GCN) is studied in this work. The interfacial interaction, separation of photogenerated carriers, and reaction driving force of TCO/GCN are investigated using density functional theory (DFT) calculations. TCO serves as an electron acceptor due to its larger work function relative to GCN. The band bending caused by the interfacial charge prevents electron backflow, effectively separating photo-excited carriers. The metal sites exposed at the edge of TCO exhibit high hydrogen evolution reaction (HER) activity. This study provides a new idea for the development of 0D/2D Schottky junction photocatalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
H. Bahiraei et al.
Summary: This study investigates the photocatalytic activity of magnetic CoFe2O4/g-C3N4/ZnO (CF-gCN/ZnO) nanocomposite as a visible-light photocatalyst. The heterojunction CF-gCN/ZnO photocatalyst achieved a photodegradation efficiency of 89% for degradation of methylene blue (MB) after 100 min of irradiation. The formation of heterojunction structures at the interface of g-C3N4 and ZnO leads to improved photocatalytic activity due to the separation of the photo-generated electron-hole pairs.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Jie-Yinn Tang et al.
Summary: This study presents an interface engineering strategy to co-integrate isotype and p-n heterojunctions, enabling the fabrication of g-C3N4/g-C3N4 nanohybrids. The coherent boundary between the two phases of g-C3N4 allows for intimate 2D interfacial contact through pi-pi stacking interactions. The resulting composite exhibits strong redox ability, efficient exciton dissociation, and desirable optoelectronic characteristics, highlighting the significance of interface engineering for photocatalytic enhancement.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Nan Zhang et al.
Summary: α-MnO2/g-C3N4 Z-scheme heterojunction was constructed for the complete decomposition of HCHO to CO2 at room temperature. The composite exhibited excellent photothermal catalytic activity, achieving complete mineralization of HCHO with solar-light illumination. The formation of the heterojunction inhibited the recombination of electron-hole pairs and overcame the band defects. The mechanism was discovered to be a thermal-assisted photocatalytic process rather than solar-light driven thermal catalysis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Doudou Chen et al.
Summary: g-C3N4 supported Pd nanotetrahedrons (Pd NTs@g-C3N4) were prepared by an in-situ growth method with water-induced process. The unique Pd nanotetrahedrons with four (111) facets exposed were prepared by adjusting only the dosage of water. The optimized Pd NTs@gC3N4 showed higher activity towards nitrobenzene hydrogenation compared to commercial Pd/C, attributed to their small size, tetrahedral shape, higher surface energy, and more active surface. Importantly, the Pd NTs@g-C3N4 exhibited excellent activity and selectivity for nitrobenzene hydrogenation with minimal deactivation after ten cycles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Ibrahim F. Waheed et al.
Summary: Protecting aquatic ecosystems from dye pollutants, especially methylene blue, is crucial for human health and marine life. In this study, a novel binary CNFO/g-C3N4 heterojunction photocatalyst was synthesized for the degradation of methylene blue pollutants. The catalyst exhibited exceptional efficiency, reusability, and magnetic extraction capability.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Shafali Singh et al.
Summary: In recent decades, pharmaceuticals have become a new category of environmental pollutants due to their presence in water bodies. Metal-free g-C3N4 (GCN)-based composites have gained significant attention for their ability to degrade pharmaceutical compounds. This study prepared and characterized a GCN/BiOCl composite, which showed excellent stability in degrading levofloxacin (LVX) under solar light irradiation. The composite was also effective in degrading other pharmaceuticals in an aqueous phase. Therefore, this work presents an effective method for the simultaneous degradation of pharmaceutical contaminants in water using the GCN/BiOCl composite.
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Opeyemi A. Oyewo et al.
Summary: This study explores the removal efficiency of two composites of graphene oxide and protonated graphitic carbon nitride functionalized with ZnO in removing murexide from water. It is found that both composites show enhanced photocatalytic and adsorption capacities compared to pristine ZnO, with the improvement influenced by the nature of the support material.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhengru Zhu et al.
Summary: A solar-driven Zn2SnO4/g-C3N4 composite photocatalyst was synthesized and characterized. The photocatalyst showed enhanced performance for norfloxacin degradation under visible light compared to Zn2SnO4 and g-C3N4. The Z-scheme migration pattern is proposed as the reason for the improved photocatalytic efficiency.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dongyu Tan et al.
Summary: A series of Z-scheme heterojunction g-C3N4/Bi5O7I composites were successfully synthesized using an electrostatic self-assembly method. The optimized 15%-g-C3N4/Bi5O7I exhibited efficient degradation of tetracycline under visible light irradiation, attributed to the generation of photo-induced h+ and O2•- radicals. The migration of photo-induced h+ and e- between g-C3N4 and Bi5O7I was investigated, and the degradation pathways and toxicological simulation of tetracycline were evaluated. The composite also demonstrated good stability and reusability, making it a promising photocatalyst for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xinyue Wang et al.
Summary: An in-situ malonamide-assisted strategy was used to prepare carbon self-doping and structural defect co-modified g-C3N4 (CDCN) to improve its photocatalytic performance in contaminant elimination. The optimal CDCN20 showed enhanced visible-light photocatalytic activity in removing acetaminophen (APAP) and methylparaben (MPB) in water compared to pristine g-C3N4.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Song Cheng et al.
Summary: Mg/Fe bimetallic oxide-modified biochar (Fe/Mg-BC) derived from Eupatorium adenophorum was prepared for effective removal of Pb(II) and Cd(II) from wastewater. Various characterization methods were employed to analyze the physicochemical properties of Fe/Mg-BC. The results showed that Fe/Mg-BC had higher adsorption capacity for Pb(II) and Cd(II) in monometallic systems due to competitive adsorption. The adsorption mechanism involved ion exchange and mineral precipitation. Density functional theory calculations indicated that Fe/Mg-BC had a stronger affinity for Pb(II) than for Cd(II). The reusability test demonstrated the excellent adsorption performance of Fe/Mg-BC for Pb(II) and Cd(II). This study highlights the potential application of Fe/Mg-BC in heavy metal wastewater treatment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Chen Yang et al.
Summary: Constructing heterojunction photocatalysts is an effective way to improve photocatalytic properties. In this study, a C-O bridged CeO2/g-C3N4 heterojunction photocatalyst was successfully constructed. Under visible light irradiation, the heterojunction showed a photocatalytic degradation efficiency for methyl orange that was 4.5 and 1.5 times higher than pristine CeO2 and CN, respectively. The C-O bond and internal electric field facilitated the separation and transfer of electron-hole pairs, leading to the generation of superoxide radical (center dot O-2(-)) and improved photocatalytic activity.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Electrical & Electronic
Payam Shoghi et al.
Summary: This study presents a novel CNS/BiOF0.4Br0.5I0.1 nanocomposite as an excellent photocatalyst for the degradation of anionic and cationic dyes and tetracycline antibiotics. The nanocomposite exhibited high degradation rates for various pollutants under visible light irradiation and showed better electron-hole separation compared to pure CN and CNS samples. The results suggest that this nano-photocatalyst has great potential for environmental applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Khursheed Ahmad et al.
Summary: In recent decades, significant progress has been made in the development of clean and renewable energy resources to address the declining availability of fossil fuels. Photocatalytic hydrogen production using heterojunctions has gained considerable attention for this purpose. A MnO2/g-C3N4 heterojunction was fabricated using the hydrothermal method and characterized using PXRD, SEM, and EDX analysis. The analysis confirmed the presence of Mn, C, N, and O elements in the sample. The narrowed bandgap of MnO2/g-C3N4 to 1.75 eV allows for efficient absorption of visible light. The MnO2/g-C3N4 heterojunctions exhibited promising results in photocatalytic H-2 evolution reaction (HER), with a H-2 production of 3855 μmol g(-1) via a Z-scheme mechanism. Additionally, the fabricated MnO2/g-C3N4 heterojunctions were effective in the degradation of industrial dyes, such as Rhodamine B (RhB) and Methyl orange (MO).
Article
Materials Science, Multidisciplinary
Jia-Yu Li et al.
Summary: This study introduces Co/Fe bimetallic oxide quantum dots-coupled g-C3N4 nanosheets (CoFeO QDs/g-C3N4 NSs) composites that efficiently degrade organic pollutants under neutral conditions. The degradation efficiency of rhodamine B (RhB) reached 98.32% within 90 min for CoFeO QDs/g-C3N4 NSs composites under the photo-Fenton condition. The formed heterojunction between CoFeO QDs and g-C3N4 NSs enhances charge transfer and efficient charge separation, making it an effective and stable photo-Fenton catalyst for degrading organic contaminants.
Article
Engineering, Chemical
Ziwei Zhao et al.
Summary: The combination of light energy and mechanical energy has been shown to be an effective method in managing environmental resources and creating sustainable energy. In this study, thin-film catalysts composed of TiO2 and BaTiO3 were prepared on glass sheets using a hydrothermal method. The synergistic effect of light and ultrasound enhanced the degradation of norfloxacin by the BaTiO3/TiO2 heterojunction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Fausthon F. da Silva et al.
Summary: In this study, the influence of mass ratio on the photocatalytic performance of CN/ZnO heterojunctions was investigated, and it was found that the sample with a mass ratio of 2 exhibited the best photocatalytic activity.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhengru Zhu et al.
Summary: Semiconductor photocatalytic technology is a potential method to remove antibiotic pollution in water. This study synthesized NiMoO4/g-C3N4 heterojunction photocatalyst and evaluated its photocatalytic degradation efficiency of tetracycline. The 30NMCN sample exhibited a significant degradation efficiency (89%) of tetracycline, which was higher than that of NiMoO4 and g-C3N4. The improved photocatalytic performance was attributed to the expansion of the light-harvesting range and altered migration pathways of charge carriers.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
Yajing Huang et al.
Summary: A 2D/2D g-C3N4/Bi2WO6 composite photocatalyst was synthesized using a hydrothermal method for the removal of gaseous methyl mercaptan (CH3SH) through photocatalytic oxidation. The CN/BWO structure and the C-O-Bi bonds at the interlayer interface effectively reduced electron/hole pairs recombination, resulting in enhanced photocatalytic efficiency. The 0.1-CN/BWO photocatalyst showed the highest efficiency, outperforming other structures and pure g-C3N4 and Bi2WO6. Reactive species trapping, electron spin resonance, and in situ diffuse reflectance infrared Fourier transform spectroscopy provided insights into the photocatalytic oxidation pathway and mechanism for CH3SH removal. This work is significant in developing efficient and stable photocatalysts for the removal of volatile organic compounds.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Wen Ge et al.
Summary: The construction of heterojunction photocatalysts is an effective method to solve global environmental issues. In this study, a g-C3N4/ZnO/Au heterojunction was designed and fabricated using a simple chemical method for photocatalytic H2 production. The results showed that the decorated Au nanoparticles enhanced the photocatalytic activity by effectively suppressing the recombination of photogenerated electron-hole pairs.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Xiaojing Qin et al.
Summary: Rape straw waste was converted into double functional carbon-based ZnO (RS/ZnO) by activation with ZnCl2, and it showed excellent adsorption and photocatalytic properties for the removal of rhodamine B (RB) and evans blue (EB) in wastewater. The adsorption mechanism involves hydrogen bonding, pi-pi interactions, electrostatic attraction, pore filling, and surface complexation. The adsorption amount of EB is higher than RB, which is supported by density functional theory calculations. The photocatalytic degradation of RB and EB reached close to 100% under UV irradiation, and the generated ·OH and ·O2(-) were responsible for the degradation process, as confirmed by electron paramagnetic resonance spectrometer analysis. This work demonstrates the potential of utilizing rape straw waste for dye wastewater purification.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Chun Shi et al.
Summary: This study aims to explore the effects of cellulose surface groups on the formation and properties of ZnO catalysts. The results indicate that the diameter, sheet number, and thickness of flower-like ZnO in porous ZnO/cellulose nanocomposites are increased with the enhancement of cellulose surface electronegativity. The ZnO/cellulose nanocomposites with surface carboxyl content of 1.63 mmol*g(-1) and zeta potential of -52.6 mV (ZnO/TOCNF3) have the highest photocatalytic activities and recycling for MO degradation.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Bingzhi Yu et al.
Summary: In this study, a g-C3N4/Bi2MoO6 heterostructure was fabricated and optimized for efficient photocatalytic dechlorination of TCS under visible light irradiation. The catalyst exhibited high activity, with over 95.5% of TCS transformed in 180 minutes, which was 3.6 times higher than pure g-C3N4 powder. The catalyst promoted efficient electron-hole separation and showed high recyclability. The results provide a basis for designing high-performance photocatalysts for the reduction of aromatic chlorinated pollutants in dechlorinated waters.
Article
Chemistry, Physical
Rongping Xu et al.
Summary: The construction of CdS@CuS/g-C3N4 heterojunctions through hydrothermal and cation exchange process enhances the catalytic degradation activity of the photo-Fenton catalyst for the removal of methyl orange (MO). The optimized CC-10/CN heterojunction exhibits a high photo-Fenton-like catalytic performance with a degradation efficiency of 96% for MO and a total organic carbon removal rate of 75% under visible light illumination. The enhanced activity is attributed to the formation of the photo-Fenton effect and reduced carrier recombination rate in the CC-10/CN heterojunction.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Z. F. Gu et al.
Summary: In this study, g-C3N4/LaFeO3 nanocomposites were successfully synthesized with well-dispersed LaFeO3 nanoparticles on g-C3N4 nanosheets. The g-C3N4/LaFeO3 nanocomposites exhibited excellent photocatalytic activity for the degradation of tetracycline hydrochloride (TC-HCl) antibiotics under visible light irradiation, with a degradation efficiency 13.6-fold and 2.6-fold higher than pristine LaFeO3 nanoparticles and g-C3N4 nanosheets, respectively. The p-n heterojunctions of g-C3N4/LaFeO3 effectively separated photogenerated electrons and holes, leading to the enhanced photocatalytic activity. Moreover, the dominant radical during the photodegradation process was found to be center dot O-2(-) according to active species trapping experiments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Jianjun Song et al.
Summary: A facile calcination and hydrothermal method was used in this study to prepare a MIL-101(Fe)/g-C3N4 composite catalyst for the degradation of tetracycline hydrochloride (TC) using peroxymonosulfate (PMS) activation. The mechanism of the MIL-101(Fe)/g-C3N4 photo Fenton-catalyzed PMS activation process was elucidated, demonstrating the involvement of various radicals and nonradicals. This research provides valuable insights for the design and synthesis of metal-free conjugated polymers modified by metal-organic frameworks for heterogeneous photo-Fenton reactions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Review
Materials Science, Multidisciplinary
Jiani Lu et al.
Summary: S-scheme heterostructure photocatalysts utilize the synergistic and superposition effects of materials to effectively separate electrons and holes, maintain strong redox capacity, and address current photocatalytic reaction issues. This review explores the origins and unique benefits of S-scheme heterojunctions, summarizes the effects of different semiconductor dimensions, analyzes methods for proving the formation of heterojunctions and electron transfer processes, and reviews their applications in various photocatalytic fields. It aims to provide an essential reference for the development and application of S-scheme heterojunction photocatalysis. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Zhichong Qi et al.
Summary: In this study, a photoelectrochemical (PEC) aptasensor based on graphitic carbon nitride (g-C3N4) loaded by CoN nanoparticles was proposed for sensitive detection of Atrazine (ATZ). The aptasensor showed excellent stability, selectivity, and anti-jamming capability, making it a practical technology for selective and sensitive detection of ATZ in the aquatic environment.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Spectroscopy
Tao Xu et al.
Summary: A novel composite substrate of graphitic carbon nitride/molybdenum disulfide/silver with a 3D surface structure was successfully developed for the recyclable detection of gefitinib in serum. The uniform and dense hotspots on the shrubby active surfaces, along with the potential synergistic chemical enhancement of g-C3N4/MoS2 heterosystem, demonstrated a remarkable SERS sensitivity. The type-II heterojunction between g-C3N4 and MoS2, assisted by the localized surface plasmon resonance of Ag NPs, enabled more efficient diffusion of photogenerated e--h+ pairs and contributed to the reliable recyclable detection of gefitinib with ultra-low detection limit and high recycling rates.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Ji Xia et al.
Summary: Elliptic spherical staggered flower-like g-C3N4/TiO2 fluffy porous heterojunctions were prepared by solvothermal method using tetrabutyl titanate as titanium source and acetic acid as acid solvent. SEM and TEM showed that the ellipsoidal TiO2 was crisscrossed on the flowered TiO2, loaded on fluffy porous g-C3N4. The material exhibited good photodegradation of organic pollutants under visible light, and g-C3N4/TiO2-2 (CNT-2) could remove 99.5% MO within 120 min. In addition, CNT-2 exhibited remarkable photodegradation performance for single and binary mixtures. The main reason for improved performance is that elliptic spherical staggered flowerlike TiO2 and porous g-C3N4 form a heterojunction, which is benefit to reduce the electron-hole recombination efficiency of TiO2 and improve the separation of electron-hole pairs. This result presents a simple strategy for photodegradation of organic pollutants.
CHEMICAL PHYSICS LETTERS
(2023)
Review
Chemistry, Physical
Liquan Jing et al.
Summary: Photocatalysis and piezocatalysis are important catalytic processes widely used in the fields of energy and environmental restoration. Photocatalysis is limited by the rapid recombination of electron-hole pairs, while piezocatalysis can achieve high-efficiency energy conversion through mechanical energy. Piezo-photocatalysis can combine the advantages of the two to improve catalytic efficiency, but there is still a vast knowledge gap for its design, applications, and prospects.
Article
Engineering, Environmental
Yarabahally R. Girish et al.
Summary: The coupling of two different photocatalytically active semiconductors is becoming popular due to its ability to enhance photocatalytic activity. In this study, ZnO/g-C3N4 heterojunction hybrids were generated by mixing dispersed ZnO and g-C3N4 nanoparticles. The composite showed significant degradation of methylene blue dye and improved hydrogen evolution reaction activity, attributed to the increased charge-transfer rate and the presence of exposed edge sites in the heterocomponents.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2023)
Article
Materials Science, Ceramics
Zhengyi Zhang et al.
Summary: In this research, a novel g-C3N4/ZnO composite microspheres (CZCM) with enhanced photocatalytic activity under visible light exposure were successfully prepared. A hierarchical structure in which ZnO microspheres were closely covered with g-C3N4 nanosheets was constructed to improve the photocatalytic performance. The optimized CZ-15% sample showed much higher photocatalytic degradation efficiency than bare g-C3N4 or ZnO. Photoluminescence and photocurrent analysis confirmed the effective generation of photo-induced electron-hole pairs and the photocatalysis in CZCM. The possible photocatalysis mechanism for the reaction process was proposed based on the experimental results and relative energy band levels of the two semiconductors.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Qi Sun et al.
Summary: This study proposes a facile method to synthesize an efficient photocatalytic material, CNZn heterojunction, for the degradation of sulfonamides. The optimized CNZn heterojunction exhibited significantly higher degradation efficiency for sulfamethoxazole compared to g-C3N4 and ZnO alone. The study also reveals the photodegradation mechanism of sulfamethoxazole and proposes a possible mechanism for enhanced degradation using a CNZn heterojunction photocatalyst.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yibo Wu et al.
Summary: In this study, a new capture-backdonation-recapture mechanism is proposed to solve the issues in the development of heteronuclear metal-free double-atom catalysts. Based on this mechanism, the material structure, adsorption energy, catalytic activity, and selectivity are systematically investigated to evaluate the performance of 36 catalysts. B-Si@BP1 and B-Si@BP3 are selected as promising catalysts with good catalytic performance and low limiting potentials. The results also verify the validity of the capture-backdonation-recapture mechanism. This work expands the ideas and lays the theoretical foundation for future development of heteronuclear metal-free double-atom catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
Song Cheng et al.
Summary: Magnetic separation photocatalyst-adsorbent (MSPA) with magnetic, photocatalytic and adsorption properties was successfully prepared from cotton stem for the removal of rhodamine B and malachite green wastewater. The results showed that MSPA exhibited excellent adsorption and photocatalytic degradation performance, and could be quickly recycled for reuse.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Energy & Fuels
Debajyoti Das et al.
Summary: A simple low-temperature hydrothermal route was used to prepare binary ZnO/g-C3N4 heterostructures, which showed improved performance in DSSC application. The growth of g-C3N4 layer on ZnO nanorods surface delayed electron recombination and increased electron concentration in the photoelectrode.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Agricultural Engineering
Song Cheng et al.
Summary: This study investigated the utilization of poplar waste for the production of valuable pyrolysis products. The bio-oil obtained contained a significant amount of aldehydes and showed potential application in the chemical industry. The pyrolysis temperature had a significant impact on the composition and heating value of the bio-gas produced. Biochar, derived from the poplar waste, showed excellent adsorption capacity for Ag+ ions and formed a value-added composite material. The composite material demonstrated high catalytic activity for methyl orange removal and also served as a cathode material for lithium ion batteries.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dong Liu et al.
Summary: A novel N-rich carbon nitride material C3N5 was designed and prepared in this study, which formed a sandwich heterojunction with C3N4, demonstrating a synergistic effect of electron-rich and hole-rich reservoirs. The 2D/2D heterojunction was applied to achieve efficient visible-light-responsive activity for H2 evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Hai-Ying Jiang et al.
Summary: In this study, a metal organic molecule was anchored onto the surface of α-Bi2O3 nanoparticles, resulting in an efficient hybrid for eliminating high concentrations of methyl orange in waste water. The hybrid showed higher photocatalytic activity than commercial P25 and could degrade methyl orange at a concentration 5 times higher than previous research. A targeted Z-scheme construction was proposed and demonstrated, providing new explanations for the mechanism.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Song Cheng et al.
Summary: A low-cost and selective adsorbent CC-CCW@DM was prepared by modifying crofton weed with 1,3-diaminoguanidine monohydrochloride for efficient removal of Pb(II). The adsorbent showed good selectivity and high adsorption capacity for Pb(II) removal, with recycling experiments demonstrating its cost-saving potential.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Ceramics
Amene Naseri et al.
Summary: Semiconductor-based photocatalysis using ZnO/g-C3N4 composite nanofibers has shown highly efficient degradation of organic pollutants, particularly with the presence of carbonaceous species. The enhanced photocatalytic activity of the composite nanofibers is attributed to the formation of carbonaceous species on the ZnO nanofibers, leading to improved degradation rates of pollutants like methylene blue. Advanced characterization techniques such as XPS and ESR have confirmed the presence of oxygen vacancies in the ZnO structure, supporting the proposed mechanism for the improved performance of the composite nanofibers.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Quan Hu et al.
Summary: The study developed a self-adaption adsorbent MgO-MCS through a cross-linking/embedding method combining magnetic substances and Chitosan, which could efficiently remove anionic dyes. MgO-MCS showed better adsorption effect and wider application range due to the formation of more micropores and mesopores on its surface.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Pan Yang et al.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2020)
Article
Engineering, Electrical & Electronic
S. Prabhu et al.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Chemistry, Physical
Fahad A. Alharthi et al.
Article
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