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Journal ArticleDOI

Direct Z-scheme ZnO/CdS hierarchical photocatalyst for enhanced photocatalytic H2-production activity

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TLDR
In this article, a ZnO/CdS hierarchical composite was prepared through a hydrothermal and chemical bath deposition (CBD) process and its photocatalytic H2-production performance was tested.
Abstract
Herein, ZnO/CdS hierarchical composite was prepared through a hydrothermal and chemical bath deposition (CBD) process. Its photocatalytic H2-production performance was tested. Mass ratio of CdS acted a pivotal part in light absorption and photocatalytic properties. Noticeably, promoted photocatalytic H2-production activity of 4134 μmol g−1 h-1 was achieved by the sample with optimal CdS content. Significantly, the photoluminescence (PL) detection of hydroxyl radicals, as well as the in-situ XPS measurements was selected to verify the direct Z-scheme charge migration mechanism. This mechanism endowed the composite with strong capability for hydrogen evolution and elucidated the improved photocatalytic performance. The improvement of photocatalytic activity was due to hierarchical structure, extended visible light response and direct Z-scheme mechanism. This work will give an innovative vision in constructing direct Z-scheme photocatalytic system with great photocatalytic H2-production activity.

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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

Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction.

TL;DR: TiO2/perovskite (CsPbBr3) S-scheme heterojunctions synthesized by a facile electrostatic-driven self-assembling approach are developed which greatly promotes the separation of electron-hole pairs to foster efficient CO2 photoreduction.
Journal ArticleDOI

A critical review in strategies to improve photocatalytic water splitting towards hydrogen production

TL;DR: In this article, a review of photo-catalysts, fabrication of novel heterojunction constructions and factors influencing the photocatalytic process for dynamic H2 production have been discussed.
Journal ArticleDOI

Enhanced photocatalytic H2-production activity of WO3/TiO2 step-scheme heterojunction by graphene modification

TL;DR: In this paper, a graphene-modified WO3/TiO2 step-scheme heterojunction composite photocatalyst was fabricated by a facile one-step hydrothermal method.
Journal ArticleDOI

Z-Scheme Photocatalytic Systems for Carbon Dioxide Reduction: Where Are We Now?

TL;DR: In this review, the fundamentals of photocatalytic CO2 reduction and Z-scheme systems are introduced, and challenges and opportunities are presented to open a new epoch in engineering high-efficiency Z- Scheme photoc atalyticCO2 reduction systems.
References
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Journal ArticleDOI

Electrochemical Photolysis of Water at a Semiconductor Electrode

TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
Journal ArticleDOI

Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)

TL;DR: In this article, the authors present the presentation, nomenclature, and methodology associated with the application of physisorption for surface area assessment and pore size analysis.
Journal ArticleDOI

g-C3N4-Based Heterostructured Photocatalysts

TL;DR: In this article, a review summarizes the recent significant progress on the design of g-C3N4-based heterostructured photocatalysts and their special separation/transfer mechanisms of photogenerated charge carriers.
Journal ArticleDOI

Enhanced photocatalytic performance of direct Z-scheme g-C3N4–TiO2 photocatalysts for the decomposition of formaldehyde in air

TL;DR: For the first time, a direct g-C3N4-TiO2 Z-scheme photocatalyst without an electron mediator was prepared by a facile calcination route utilizing affordable P25 and urea as the feedstocks and will provide new insights into the design of high-performance Z-Scheme photoc atalysts for indoor air purification.
Journal ArticleDOI

Direct Z-scheme photocatalysts: Principles, synthesis, and applications

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.
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