AcesExperimental and theoretical study on photocatalytic nitrogen reduction catalyzed by Fe doped MoO2

Article Engineering, Environmental

Construction of dual vacancies to regulate the energy band structure of ZnIn2S4 for enhanced visible light-driven photodegradation of 4-NP

Guanhua Zhang et al.

Summary: In this study, ZnIn2S4 with Zn vacancy and S vacancy was prepared and showed enhanced photocatalytic performance due to the regulation of energy band structure and improved carrier separation efficiency.

JOURNAL OF HAZARDOUS MATERIALS (2023)

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Article Engineering, Environmental

Adsorptive and photocatalytic performance of cobalt-doped ZnTiO3/Ti3C2Tx MXene nanohybrids towards tetracycline: Kinetics and mechanistic insight

Soyoung Park et al.

Summary: In this study, cobalt doped/ZnTiO3/Ti3C2Tx MXene material was synthesized and found to have excellent performance in the adsorption and photocatalytic degradation of tetracycline antibiotics. The material showed high adsorption capacity and degradation rate, suggesting its potential application in removing tetracycline antibiotics widely used in animal husbandry.

JOURNAL OF HAZARDOUS MATERIALS (2023)

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Article Engineering, Chemical

The S-Cu-O bonds boosted efficient photocatalytic degradation of semi-coherent interface Cu2O/Cu7S4 heterojunction

Xinxin Yuan et al.

Summary: In this paper, a semi-coherent interface Cu2O/Cu7S4 heterojunction was successfully constructed by the epitaxy growth method of anion exchange. The degradation of tetracycline by the semi-coherent interface Cu2O/Cu7S4-30 heterojunction under simulated visible light reached 95.3% at 60 min, which is a significant improvement compared with single-phase catalysts and ordinary heterojunction catalysts (Cu2O/Cu7S4-mix). The existence of unique S-Cu-O chemical bonds in the semi-coherent interface Cu2O/Cu7S4 heterojunction was confirmed through experimental characterization and theoretical calculations.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Chemistry, Physical

DFT calculations of double vacancies MoS2 catalyzing water gas shift reaction: S vacancies as electron bridge promote electron transfer to H2O and CO molecules

Yue Du et al.

Summary: The poor activity of MoS2 basal plane limits efficient hydrogen production. Single and double sulfur vacancy MoS2 (VS-MoS2 and VS, S-MoS2) were used for water gas shift reaction (WGSR). The adsorption energy of VS, S-MoS2 for CO molecule is significantly higher than that of original MoS2 and VS, S-MoS2. The energy barrier of the rate-determining step in the association mechanism of VS, S-MoS2 is lower than pristine MoS2. S vacancies serve as active sites for CO and H2O adsorption and facilitate electron transfer.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2023)

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Article Materials Science, Multidisciplinary

Fe/N co-doped nano-TiO2 wrapped mesoporous carbon spheres for synergetically enhanced adsorption and photocatalysis

Xiaotong Feng et al.

Summary: Fe/N co-doped nano-TiO2 wrapped on mesoporous carbon spheres with a core-shell structure was designed to improve the synergy of adsorption and transfer, significantly enhancing the photocatalytic efficiency. The composite shows potential advantages in treating diverse environmental pollutants.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2023)

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Article Chemistry, Physical

Photocatalytic reduction of nitrogen to ammonia by bismuth oxyhalides containing oxygen vacancies

Jieyi Yang et al.

Summary: In this study, BiOCl and BiOBr photocatalysts with abundant O vacancies were synthesized for photocatalytic reduction of nitrogen to ammonia. The results showed that the ammonia generation rates of BiOCl and BiOBr with O vacancies were significantly higher than those of pure BiOCl and BiOBr. The O vacancies narrowed the band gap of BiOX and reduced the energy requirement for visible-light excited carrier generation. The O vacancies not only enriched photogenerated electrons but also promoted the transfer of more electrons to N2 molecules, thereby facilitating photocatalytic N2 reduction reaction.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2023)

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Article Engineering, Chemical

Comparative computational study of CO2 hydrogenation and dissociation on metal-doped Pd clusters

Detang Guo et al.

Summary: Density functional theory calculations were performed to investigate CO2 adsorption and initial conversion on Pd12M (M = Fe, Co, Ni, Cu, Zn, Ru, Rh, Pd, Ag, Cd) bimetallic clusters, with a focus on identifying the optimal ancillary metal to Pd. The stability analysis showed that the doped Pd13 clusters with transition metals having higher surface energy than Pd exhibited better structural stability. The structural parameters of CO2* were found to have a significant linear relationship with the amount of charge transfer.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Chemistry, Physical

Enhancing photocatalytic nitrogen fixation performance of Co-doped bismuth molybdate through band engineering tuning

Zhenyu Liu et al.

Summary: Energy band engineering through doping is shown to greatly influence the photocatalytic properties of semiconductors. In this study, a novel Co-doped Bi2MoO6 (Co-BMO) photocatalyst was developed for photocatalytic nitrogen fixation. The Co-BMO with microsphere structure achieved significantly higher NH3 yield and improved separation efficiency of photogenerated carriers due to successful Co2+ doping, leading to enhanced photocatalyst activity.

APPLIED SURFACE SCIENCE (2023)

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Article Engineering, Environmental

Molecular-level insight into photocatalytic reduction of N2 over Ruthenium single atom modified TiO2 by electronic Metal-support interaction

Guangmin Ren et al.

Summary: The sustainable production of NH3 via photocatalysis is challenging due to the difficulty in activating inert N-2. In this study, a photocatalyst based on electronic metal-support interactions (EMSI) was developed, and introducing Ru single atoms into TiO2 improved the N-2 fixation performance. The enhanced EMSI facilitated the transfer of photogenerated carriers and achieved efficient photocatalytic N-2 reduction.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Engineering, Environmental

Construction of zinc-oxygen double vacancies BiOCl/ZnS Z-scheme heterojunction and photocatalytic degradation of norfloxacin

Wujian Zhang et al.

Summary: Defect (vacancy) engineering is an effective and low-cost strategy to modify the catalyst surface for Z-scheme heterojunction. In this study, metal and non-metal double vacancies (VZn+O) Z-scheme heterojunction photocatalysts (BiOCl/ZnS-VZn+O) were synthesized for the first time for the degradation of norfloxacin (NOR). The results demonstrate that the introduction of double vacancies and the Z-scheme heterojunction significantly enhance the carrier migration and separation efficiency of BiOCl/ZnS-VZn+O, resulting in excellent photodegradation performance of NOR.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2023)

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Article Chemistry, Multidisciplinary

Mo2C-MoO2 Heterostructure Quantum Dots for Enhanced Electrocatalytic Nitrogen Reduction to Ammonia

Yuchi Wan et al.

Summary: This study proposes Mo2C-MoO2 heterostructure quantum dots embedded in reduced graphene oxide as efficient catalysts for the electrocatalytic NRR, achieving a high NH3 yield rate and Faradaic efficiency. Density functional theory calculations and surface properties analysis reveal the superior performance of this catalyst.

ACS NANO (2022)

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Article Engineering, Environmental

Fe-carbon dots enhance the photocatalytic nitrogen fixation activity of TiO2@CN heterojunction

Kang Li et al.

Summary: FeN-CDs/TiO2@CN photocatalyst exhibits excellent nitrogen fixation activity, attributed to efficient electron transfer from CDs to active centers, tight heterogeneous interfaces between carbon dots/TiO2 and graphic carbon nitride, and the coexistence of anatase and rutile TiO2. FeN-CDs is confirmed as the active site for nitrogen fixation, with a proposed mechanism for photo-induced charge separation and nitrogen photofixation on FeN-CDs/TiO2@CN.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Inorganic & Nuclear

Synergistic effect of the MoO2/CeO2 S-scheme heterojunction on carbon rods for enhanced photocatalytic hydrogen evolution

Xuanpu Wang et al.

Summary: The introduction of cheap carbon rods into the S-scheme heterojunction of CeO2/MoO2 as electron transfer channels greatly improves the separation efficiency of photogenerated carriers, leading to enhanced photocatalytic hydrogen evolution activity. The 30% CeO2/MoO2-C catalyst exhibits a higher hydrogen evolution rate and good stability in photocatalytic cycle experiments after optimization.

DALTON TRANSACTIONS (2022)

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Article Chemistry, Multidisciplinary

Electronic Structure Modulation in MoO2/MoP Heterostructure to Induce Fast Electronic/Ionic Diffusion Kinetics for Lithium Storage

Yuanhao Shen et al.

Summary: This study investigates the performance of a heterostructure nanobelt material composed of mesoporous molybdenum dioxide and molybdenum phosphide. By designing the structure and modulating the electronic properties, the material demonstrates improved electrical conductivity and electron/Li-ions diffusion kinetics. Through experiments and calculations, the lithium storage mechanism, crystal structure changes, and diffusion behavior are characterized. The material exhibits excellent cycling performance and rate capability, offering a potential avenue for developing high-performance lithium-ion storage materials.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Ru-incorporated oxygen-vacancy-enriched MoO2 electrocatalysts for hydrogen evolution reaction

Chuang Li et al.

Summary: This paper successfully designs Ru/MoO2_x catalyst for the alkaline hydrogen evolution reaction, addressing the insufficient electrochemical activity of MoO2 and weak adsorption/dissociation abilities of Ru. The specific structure design incorporating Ru-O-Mo sites and oxygen-vacancy-enriched MoO2 enables the catalyst to exhibit excellent electrocatalytic activity.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Inorganic & Nuclear

High-Efficiency Photocatalytic Ammonia Synthesis by FacetOrientation-Supported Heterojunction Cu2O@BiOCl[100] Boostedby Double Built-In Electric Fields

Lianyang Zhang et al.

Summary: In this study, a facet-oriented supported heterojunction of Cu2O and BiOCl (Cu2O@BiOCl[100]) was fabricated based on the poly-facet-exposed BiOCl single crystal. The photocatalytic nitrogen reduction reaction (pNRR) activity of Cu2O@BiOCl[100] was significantly enhanced compared to Cu2O, BiOCl, and Cu2O@BiOCl-ran. The mechanism of Cu2O@BiOCl[100] for pNRR was discussed, showcasing the potential of this construction scheme for designing high-performance photocatalysts for nitrogen reduction.

INORGANIC CHEMISTRY (2022)

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Article Chemistry, Physical

Fe-doped SnO2 nanosheet for ambient electrocatalytic nitrogen reduction reaction

Yaxi Li et al.

Summary: In this study, iron-doped tin oxide (Fe-doped SnO2) was designed as a catalyst for nitrogen reduction. The Fe-doped SnO2 showed improved catalytic activity, NH3 yield, and Faradaic efficiency compared to pure SnO2. Density functional theory calculations revealed that the doped Fe atoms enhanced the catalytic performance by lowering the energy barrier of the rate-limiting step. The study also demonstrated the importance of electrons in the low-frequency region for determining the electron transfer ability of Fe-doped SnO2.

NANO RESEARCH (2022)

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Article Materials Science, Ceramics

Construction and performance of CdS/MoO2@Mo2C-MXene photocatalyst for H2 production

Sen Jin et al.

Summary: Photocatalytic technologies are considered as promising strategies to solve energy problems. In this paper, a novel CdS/MoO2@Mo2C-MXene photocatalyst was constructed using a two-step hydrothermal method. The composite exhibited an ultrahigh visible-light photocatalytic H-2 production activity and improved energy band structure, providing a new pathway for preparing low-cost photocatalysts.

JOURNAL OF ADVANCED CERAMICS (2022)

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Article Nanoscience & Nanotechnology

Chemically Homogenizing MoO2 Nanocrystals into Monodispersed Spherical Shapes for Enhanced Cr(VI) Photoreduction

Qian Zhang et al.

Summary: The development of monodispersed crystalline nanoparticles with previously unavailable spherical shapes has been a challenge. However, researchers have now demonstrated a method to achieve highly crystalline monodispersed oxide nanospheres by utilizing shape evolution of metal oxide nanoparticles. These nanospheres exhibit superior photoreduction ability and have exciting prospects for practical applications in photocatalysis.

ACS APPLIED NANO MATERIALS (2022)

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Article Chemistry, Physical

Electronic Modulation of the Interaction between Fe Single Atoms and WO2.72-x for Photocatalytic N2 Reduction

Biao Hu et al.

Summary: In the design of photocatalysts for ammonia synthesis, the fixation of single Fe atoms effectively provides sites for nitrogen adsorption and activation, leading to enhanced interaction between the catalyst surface and nitrogen molecules. The optimized catalyst shows a high NH(4)( )(+) generation rate during photocatalytic N-2 reduction.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Oxygen vacancy-regulated metallic semiconductor MoO2 nanobelt photoelectron and hot electron self-coupling for photocatalytic CO2 reduction in pure water

Xiaoyu Liu et al.

Summary: This study demonstrates the promising photocatalytic CO2 reduction performance of metallic MoO2_x nanobelts in pure water. The wide-bandgap and unique surface properties of MoO2 nanobelts enable efficient CO2 reduction through the self-coupling of intrinsic excited photoelectrons and plasmonic hot electrons. The presence of oxygen vacancies enhances CO2 adsorption and chemical activation.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Review Chemistry, Physical

Structural design and control of photocatalytic nitrogen-fixing catalysts

Yujiao Xia et al.

Summary: The traditional process of synthetic nitrogen-fixing ammonia is energy-consuming and environmentally unfriendly. Therefore, exploring new methods for ammonia synthesis under mild conditions is crucial. Photocatalytic nitrogen fixation utilizes solar energy as an energy source to convert nitrogen to ammonia through photocatalysis at normal temperatures. In recent years, the development of highly efficient photocatalysts has been a hot topic. This study mainly discusses the structure and design of photocatalytic nitrogen-fixing materials, such as introducing vacancies, conducting element doping, and constructing heterojunctions. The study also introduces the oxidation process of N-2 to nitrogen compounds, providing inspiration for the research and development of nitrogen-fixing photocatalysts.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Review Chemistry, Applied

Inorganic-organic hybrid photocatalysts: Syntheses, mechanisms, and applications

Hui Yang et al.

Summary: This paper reviews the syntheses, mechanisms, and applications of inorganic-organic hybrid materials in the field of photocatalysis. It covers the role and design principles of inorganic-organic photocatalysts, as well as their applications in hydrogen evolution, organic pollutant degradation, and heavy metals reduction.

CHINESE JOURNAL OF CATALYSIS (2022)

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Article Chemistry, Physical

TiO2/BiOBr 2D-2D heterostructure via in-situ approach for enhanced visible-light photocatalytic N2 fixation

Jiangpeng Wang et al.

Summary: The TiO2/BiOBr 2D-2D heterojunction photocatalysts showed excellent photocatalytic nitrogen fixation activity with a maximum NH3 production rate of 1.43 mmol/g/h for the 15% TiO2/BiOBr catalyst, which was about 4 times higher than that of pure BiOBr. The enhanced performance can be attributed to the 2D interface between TiO2 and BiOBr nanosheets, which facilitates the transfer of photogenerated electrons and increases electron participation in the nitrogen fixation reaction. This study highlights the potential of 2D-2D heterojunctions as an effective strategy to enhance solar energy utilization.

APPLIED SURFACE SCIENCE (2021)

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Review Chemistry, Physical

Recent Progress in 2D Catalysts for Photocatalytic and Electrocatalytic Artificial Nitrogen Reduction to Ammonia

Guoqiang Zhang et al.

Summary: The use of 2D catalysts in photocatalytic and electrocatalytic N2RR shows great potential, with their unique physical, chemical, and electronic properties providing advantages such as shortened carrier diffusion pathways, higher specific surface areas and conductivity, more vacancy-type defects, and exposed edge sites.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

Transition metal doping BiOBr nanosheets with oxygen vacancy and exposed {102} facets for visible light nitrogen fixation

Xue Chen et al.

Summary: Artificial photocatalytic N-2 reduction to NH3 under ambient conditions is a promising alternative to industrial N-2 fixation. This study demonstrated the engineering of BiOBr nanosheets with transition metal doping and oxygen vacancies to enhance visible light N-2 fixation efficiency. The synergy of transition metal doping and oxygen vacancies improved charge carrier separation and electron transfer, leading to enhanced N-2 adsorption and activation ability over modified BiOBr nanosheets.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Heterostructured MoO2@MoS2@Co9S8 nanorods as high efficiency bifunctional electrocatalyst for overall water splitting

Yanqiang Li et al.

Summary: Developing a low-cost and high-efficiency bifunctional catalyst MoO2@MoS2@Co9S8 is critical for catalyzing electrochemical overall water splitting to produce hydrogen. Utilizing an in-situ reduction and vulcanization strategy, MoO2@MoS2@Co9S8 heterostructure nanorods were prepared with outstanding catalytic performances for both HER and OER. The 2D nanosheet assembled heterostructure nanorods can effectively catalyze water splitting with high stability, demonstrating practical application potential.

APPLIED SURFACE SCIENCE (2021)

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Article Chemistry, Physical

Photocatalytic Ammonia Synthesis: Mechanistic Insights into N2 Activation at Oxygen Vacancies under Visible Light Excitation

Xianghong Niu et al.

Summary: This study reveals a photoexcitation-assisted N2 activation mechanism in oxide semiconductors like BiOBr, addressing the issue of band edge reduction potentials not meeting nitrogen fixation requirements. The mechanism involves OV defect states providing higher reduction potential for photogenerated electrons, facilitating NH3 synthesis. This advancement in understanding photocatalytic N2 fixation may offer a new approach for designing efficient ammonia photocatalysts.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Single-Metal-Atom Dopants Increase the Lewis Acidity of Metal Oxides and Promote Nitrogen Fixation

Jinsun Lee et al.

Summary: This study found that tuning the electronic structure of defective Co3O4 via single-Ru-atom dopant can enhance N-2 adsorption, stabilize key N-intermediates, and significantly boost NH3 selectivity.

ACS ENERGY LETTERS (2021)

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Article Engineering, Environmental

Direct Z-scheme CeO2@LDH core-shell heterostructure for photodegradation of Rhodamine B by synergistic persulfate activation

Chao Yang et al.

Summary: The CeO2@LDH photocatalyst demonstrates excellent persulfate activation performance and high degradation efficiency under visible light irradiation. The Z-scheme structure effectively facilitates the transfer of hot carriers and inhibits the recombination of electron-hole pairs, generating more active species for photodegradation. This system shows promise for degrading RhB and potentially other organic pollutants.

JOURNAL OF HAZARDOUS MATERIALS (2021)

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Letter Materials Science, Multidisciplinary

Enhancing the Supply of Activated Hydrogen to Promote Photocatalytic Nitrogen Fixation

Xuanang Bian et al.

Summary: The strategy of utilizing Pt-doped Ag nanoparticles supported on TiO2 to improve the supply of activated hydrogen for promoting photocatalytic N-2 fixation has successfully increased NH3 yield, and can be applied to other efficient catalysts for nitrogen fixation.

ACS MATERIALS LETTERS (2021)

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Article Materials Science, Multidisciplinary