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Article
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Summary: A Z-scheme heterojunction with spatially separated cocatalysts is proposed for efficient photocatalytic water splitting. The study demonstrates that the combination of a Z-scheme heterojunction and spatially separated cocatalysts can enhance surface charge separation and reaction kinetics, leading to high-performance photocatalytic platforms for solar fuel production.
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(2023)
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JOURNAL OF SOLID STATE CHEMISTRY
(2023)
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Article
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Caixia Ren et al.
Summary: Substitutional lanthanide doping is an effective method to modify the optical, electronic, and optoelectronic properties of 2D TMDs. However, understanding the interactions between lanthanide dopants and TMDs host is crucial for further research. In this study, the interactions between Ce dopants and monolayer WS2 were investigated using scanning tunneling microscopy and optical characterizations. It was found that the crystal field can split the energy levels of Ce dopants, leading to the formation of optical bright excitons. This study provides insights for the design and fabrication of lanthanide-doped TMDs-based devices.
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(2023)
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Summary: As a new two-dimensional carbon hybrid material, graphdiyne has attracted much attention due to its good electrical conductivity, tunable electronic structure, and special electron transfer enhancement properties. It has great potential in the field of hydrogen evolution for photocatalytic water decomposition.
APPLIED CATALYSIS B-ENVIRONMENTAL
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Zhiyun Long et al.
Summary: Inspired by natural photosynthesis, the Z-scheme heterojunction fabrication has been developed to enhance the photocatalytic H2 evolution performance of g-C3N4. The researchers in this study fabricated the Z-scheme In2O3 nanorod/C3N4 heterojunction and adjusted the length of the In2O3 nanorod to regulate the behavior of carriers. Through simulation and characterization, they clarified the mechanism of length-dependent regulation for photoelectric conversion efficiency. The optimal length (53 nm) of In2O3 nanorod was found to maximize the photoelectric conversion efficiency and achieve a 12.9-fold increase in the H2 evolution rate compared to pristine g-C3N4. This work provides a direct guideline for designing optimal geometrical configurations of g-C3N4 based heterojunctions.
CHEMICAL ENGINEERING JOURNAL
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Yuxing Shi et al.
Summary: The development of photocatalysts that maximize the use of solar spectra for efficient photocatalysis is urgently needed. In this study, a core-shell Co3O4@ZnIn2S4 heterojunction was synthesized for high-efficient photothermal-assisted photocatalytic hydrogen production. The results showed that the optimized Co3O4@ZnIn2S4 sample exhibited impressive hydrogen production rates under both AM 1.5G and real sunlight irradiation. Furthermore, the study investigated the influence of reaction solution temperature on the photocatalytic activity induced by the photothermal effect.
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(2023)
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Summary: Constructing heterostructures is an effective strategy for efficient photocatalysis, and the type of heterojunctions is determined by the charge carrier transfer path. Understanding the charge carrier transfer mechanism of heterojunctions is crucial for guiding the construction of rational heterojunctions. In this study, an S-scheme K6Nb10.8O30@Zn2In2S5 (KNbO@ZIS) heterojunction with a 1D/2D core-shell structure is designed to improve photocatalytic hydrogen production. The improved photocatalytic performance is mainly attributed to the suppressed charge carrier recombination and accelerated charge carrier transfer in the photocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
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Qiu Zhang et al.
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(2023)
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Guotai Sun et al.
Summary: Developing desirable hybrids for photocatalytic H2 generation by integrating the advantages of a single semiconductor is a tremendous challenge. In this study, an all-sulfide ZnIn2S4/CdS/PdS heterojunction is constructed for the first time, demonstrating rapid charge transfer and luxuriant reactive sites. The S-scheme mechanism between ZnIn2S4 and CdS assisted by PdS cocatalyst is proven, resulting in a glaring photocatalytic activity and high apparent quantum efficiency. This work may provide progressive tactics to design multifunctional photocatalysts.
Article
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FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
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Summary: In this study, a ternary In2.77S4/NiS2/g-C3N4 S-scheme heterojunction was constructed by synthesizing In2.77S4/NiS2 heterojunction and introducing it to the surface of g-C3N4. The ternary heterojunction exhibited excellent light harvesting ability and improved charge carrier separation and migration compared to its components. Photocatalytic tests showed significantly higher H2 production rate for In2.77S4/NiS2/g-C3N4 compared to g-C3N4, In2.77S4, and In2.77S4/g-C3N4. Further investigation revealed the charge transfer mechanism and enhanced surface reactions due to NiS2 and more electro-chemical active sites provided by In2.77S4/NiS2. This work provides an effective method for designing novel g-C3N4-based S-scheme heterojunctions.
CHEMICAL ENGINEERING JOURNAL
(2023)
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Yonggang Lei et al.
Summary: In this study, a new cocatalyst design and synthesis approach was proposed. By activating VC with Mo, the hydrogen generation activity of CdS was significantly improved. The CdS/Mo(0.38)-VC(5 wt%) photocatalyst exhibited excellent photocatalytic hydrogen production rate, hydrogen production quantum efficiency, stability, and recyclability. This work provides an economic alternative for solar-derived hydrogen production by replacing precious metals.
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Tian Wang et al.
Summary: The photocatalytic performance can be significantly improved by constructing suitable heterojunction photocatalysts. In this study, a unique new double S-scheme heterojunction photocatalyst was constructed by self-assembly of GDY and ZnAl-LDH. The formation of an internal electric field between CuI-GDY and ZnAl-LDH interface broadened the light absorption range and improved the redox ability of the photocatalytic system.
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Xiangdong Xue et al.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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Shiwen Du et al.
Summary: Having an insight into the optimizations of intrinsic properties of cocatalysts via doping foreign atoms to promote solar-driven water splitting is important. Zero-dimensional/one-dimensional structured TMCoSe/CdS0.95Se0.05 was successfully synthesized, and the FeCoSe/CdS0.95Se0.05 photocatalyst showed the most excellent H2 evolution performance. The activity can be attributed to the Schottky-type heterojunction formed between FeCoSe cocatalyst and CdS0.95Se0.05, enhancing charge carrier separation and utilization.
APPLIED CATALYSIS B-ENVIRONMENTAL
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Chao Wu et al.
Summary: A ternary composite of CdS, MoS2 and Ti3C2 MXene was successfully constructed, which exhibited reinforced photocatalytic H2-production activity and increased photocorrosion resistant capability. This work highlights the synergistic effect of Ti3C2 MXene and MoS2 on the promoted photocatalytic performance and durability of CdS, which can significantly enhance its commercial availability and industrial applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
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Gaowei Han et al.
Summary: This study investigates the efficient production of H2O2 using a PDA-modified inverse opal-structured porous ZnO photocatalyst. The PDA modification enhances the adsorption capacity and active sites of the photocatalyst, improves light absorption, charge separation, and redox capability. The resulting photoelectrode exhibits high H2O2 production performance.
ACTA PHYSICO-CHIMICA SINICA
(2022)
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Youlin Wu et al.
Summary: Surface modification of photocatalytic materials is an effective way to enhance their semiconductor activity. By utilizing a simple surface modification strategy and constructing abundant active sites, the photocatalytic activity can be improved. The introduction of NiAl-LDH-P can enhance the utilization of Zn0.5Cd0.5S on solar energy and promote the transfer rate of photogenerated carriers. The construction of the Zn0.5Cd0.5S/NiAl-LDH-P S-scheme heterojunction can change the hydrogen evolution site and improve the activity and stability of hydrogen production.
Review
Chemistry, Multidisciplinary
Yingxuan Miao et al.
Summary: The photocatalytic technique is crucial for addressing energy and environmental challenges. However, the efficiency of solar-to-chemical conversion needs improvement. Strain engineering offers a promising solution by tailoring the bandgap and electronic structure of materials, thereby enhancing photocatalytic performance. This article provides an overview of recent advances in strain engineering and summarizes its potential applications in photocatalysis. It also discusses the challenges and future directions for strain-promoted photocatalysis.
ADVANCED MATERIALS
(2022)
Article
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Yizhong Zhang et al.
Summary: The unsaturated edge S in the cocatalyst plays a crucial role in the photocatalytic hydrogen evolution process. However, effectively exposing the edge S is still a challenge. This study introduces amorphous nickel sulfide as an efficient cocatalyst to enhance the photocatalytic activity and stability of CdS. The results demonstrate that NiSx accelerates electron migration and provides abundant unsaturated edge S for hydrogen evolution.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
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Junke Li et al.
Summary: The exploration of multiple composite materials with heterojunction structures is important for high-yield hydrogen photocatalytic evolution. In this study, a Mo2S3/Bi2O2CO3 composite with a unique n-n heterojunction and 2D spatial structure was successfully prepared. The composite material with 3% Bi2O2CO3 exhibited the highest photocatalytic effect.
SEPARATION AND PURIFICATION TECHNOLOGY
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Guohui Wang et al.
Summary: Z-scheme CdS/WS2 heterojunctions with high-efficiency photocatalytic degradation and photoreduction were designed using a straightforward and green two-step hydrothermal method. The photocatalytic activity was improved by adjusting the energy band structure through tuning the molar ratio of CdS and WS2.
SEPARATION AND PURIFICATION TECHNOLOGY
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Chuanbiao Bie et al.
Summary: Photocatalytic overall water splitting is a promising technology for hydrogen production, but its current performance is insufficient for large-scale production. This paper provides a theoretical and practical analysis of the challenges associated with photocatalytic overall water splitting, including unfavorable thermodynamics, slow kinetics, dissolved oxygen, and rapid backward reaction.
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Zhongliao Wang et al.
Summary: The study demonstrates enhanced CO2 photoreduction activity through an S-scheme BiOBr/NiO heterojunction, showcasing improved understanding of the mechanism through integration of in situ monitoring techniques with density functional theory calculation.
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Kai Wang et al.
Summary: This study presents a novel zinc cadmium sulfide/nickel cobalt phosphide heterojunction for highly efficient photocatalytic hydrogen generation. The zinc cadmium sulfide/nickel cobalt phosphide-3% composite exhibits the highest photocatalytic hydrogen generation performance in a lactic acid aqueous solution at 450 nm, and demonstrates excellent photostability. This research provides a new perspective for solar energy conversion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
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Zhiliang Jin et al.
Summary: Graphdiyne was successfully synthesized and used to prepare the GDY/CuI/MIL-53(Al) S-scheme heterojunction for photocatalytic hydrogen production from water. The final hydrogen evolution rate was significantly higher than that of MIL-53(Al) after optimization of experimental conditions. The mechanism of charge transfer was also demonstrated.
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Chuchu Cheng et al.
Summary: By tuning the Schottky barriers of Ni/S vacancy-rich Mn0.3Cd0.7S, this study successfully designed Ni/MCS-s composites with superior photocatalytic performance. The composites exhibited high hydrogen production activity in simulated seawater and effectively lowered the Schottky barrier to enhance hot electron participation in the photocatalytic process.
APPLIED CATALYSIS B-ENVIRONMENTAL
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Xiangyi Wang et al.
Summary: In this study, Ag/Ag2O was grown in situ on a CeO2 substrate by a one-step method to form a Ag/Ag2O/CeO2 photocatalyst. The composite catalyst showed low overpotential, small electrochemical impedance, and wide light absorption wavelength, which are favorable for the development of a photocatalytic system. The combination of CeO2 and Eosin Y provided photogenerated electrons, while the heterostructure of the Ag/Ag2O/CeO2 system facilitated the separation of electrons on the conduction band of CeO2. The Ag/Ag2O/CeO2 catalyst exhibited excellent photocatalytic performance for hydrogen production, especially Ag/Ag2O/CeO2-30, which had the highest hydrogen production efficiency compared to Ag/Ag2O and CeO2. Therefore, Ag/Ag2O/CeO2 can be considered as a promising photocatalyst worth developing.
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Summary: This study successfully improved the efficiency of solar photocatalytic water decomposition for hydrogen production by constructing a 2%Cu2S/CZS step-scheme heterojunction. The introduction of Cu2S has advantages of reducing particle agglomeration, broadening the light response range, and accelerating charge separation and transfer.
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Hongying Li et al.
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