Journal ArticleDOI
A Hierarchical Z-Scheme CdS-WO3 Photocatalyst with Enhanced CO2 Reduction Activity
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TLDR
This study provides novel insights into the design and fabrication of high-performance artificial Z-scheme photocatalytic CO(2) reduction to perform photocatalyst reduction to form CH(4) under visible light irradiation.Abstract:
The development of an artificial photosynthetic system is a promising strategy to convert solar energy into chemical fuels. Here, a direct Z-scheme CdS-WO(3) photocatalyst without an electron mediator is fabricated by imitating natural photosynthesis of green plants. Photocatalytic activities of as-prepared samples are evaluated on the basis of photocatalytic CO(2) reduction to form CH(4) under visible light irradiation. These Z-scheme-heterostructured samples show a higher photocatalytic CO(2) reduction than single-phase photocatalysts. An optimized CdS-WO(3) heterostructure sample exhibits the highest CH(4) production rate of 1.02 μmol h(-1) g(-1) with 5 mol% CdS content, which exceeds the rates observed in single-phase WO(3) and CdS samples for approximately 100 and ten times under the same reaction condition, respectively. The enhanced photocatalytic activity could be attributed to the formation of a hierarchical direct Z-scheme CdS-WO(3) photocatalyst, resulting in an efficient spatial separation of photo-induced electron-hole pairs. Reduction and oxidation catalytic centers are maintained in two different regions to minimize undesirable back reactions of the photocatalytic products. The introduction of CdS can enhance CO(2) molecule adsorption, thereby accelerating photocatalytic CO(2) reduction to CH(4). This study provides novel insights into the design and fabrication of high-performance artificial Z-scheme photocatalysts to perform photocatalytic CO(2) reduction.read more
Citations
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Journal ArticleDOI
S-Scheme Heterojunction Photocatalyst
TL;DR: In this article, the authors soberly reflect the charge transfer mechanism from many perspectives and are finally aware of the fundamental challenges they face to ensure a correct understanding, it is necessary to share their analysis with others Moreover, step-scheme heterojunctions, consisting of a reduction photocatalyst and an oxidizer with staggered band structure, are introduced to avoid misinterpretation.
Journal ArticleDOI
Ultrathin 2D/2D WO3/g-C3N4 step-scheme H2-production photocatalyst
TL;DR: In this paper, an ultrathin 2D/2D WO3/g-C3N4 step-like composite composite heterojunction photocatalysts were fabricated by electrostatic self-assembly of ultra-thin tungsten trioxide (WO3) and graphitic carbon nitride (g)-nodes.
Journal ArticleDOI
Cocatalysts for Selective Photoreduction of CO2 into Solar Fuels.
TL;DR: Various cocatalysts, such as the biomimetic, metal-based,Metal-free, and multifunctional ones, and their selectivity for CO2 photoreduction are summarized and discussed, along with the recent advances in this area.
Journal ArticleDOI
Direct Z-scheme photocatalysts: Principles, synthesis, and applications
Quanlong Xu,Liuyang Zhang,Jiaguo Yu,Jiaguo Yu,Swelm Wageh,Ahmed A. Al-Ghamdi,Mietek Jaroniec +6 more
TL;DR: In this article, a review concisely compiles the recent progress in the fabrication, modification, and major applications of the direct Z-scheme photocatalysts; the latter include water splitting, carbon dioxide reduction, degradation of pollutants, and biohazard disinfection.
Journal ArticleDOI
Hierarchical Porous O-doped g-C3N4 with Enhanced Photocatalytic CO2 Reduction Activity
TL;DR: This work provides a novel strategy to design hierarchical g-C3 N4 nanostructures, which can be used as promising photocatalyst for solar energy conversion.
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Journal ArticleDOI
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Journal ArticleDOI
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