In situ growth of a P-type CuSCN/Cu 2 O heterojunction to enhance charge transport and suppress charge recombination

Zheng

et al. 2020

Small

209

Photocatalysis technology using solar energy for hydrogen (H2) production still faces great challenges to design and synthesize highly efficient photocatalysts, which should realize the precise regulation of reactive sites, rapid migration of photoinduced carriers and strong visible light harvest. Here, a facile hierarchical Z‐scheme system with ZnIn2S4/BiVO4 heterojunction is proposed, which can precisely regulate redox centers at the ZnIn2S4/BiVO4 hetero‐interface by accelerating the separation and migration of photoinduced charges, and then enhance the oxidation and reduction ability of holes and electrons, respectively. Therefore, the ZnIn2S4/BiVO4 heterojunction exhibits excellent photocatalytic performance with a much higher H2‐evolution rate of 5.944 mmol g−1 h−1, which is about five times higher than that of pure ZnIn2S4. Moreover, this heterojunction shows good stability and recycle ability, providing a promising photocatalyst for efficient H2 production and a new strategy for the manufacture of remarkable photocatalytic materials.

Section: Resultsmentioning

confidence: 99%

Spatially Separating Redox Centers on Z‐Scheme ZnIn₂S₄/BiVO₄ Hierarchical Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Zheng

et al. 2020

Small

209

“…In addition to traditional substrate materials, loading noble metal cocatalyst on the surface of PNCs to form novel heterostructure with extraneous surface plasmon resonance has been considered as an effective way to improve visible light absorption and facilitate charge separation. [ 116–118 ] For example, Huang and co‐workers synthesized CsPb(Br 1‐ x Cl x ) 3 ‐Au nano‐heterostructures, which demonstrated a more satisfactory photocatalytic degrade ability that about 71% of Sudan Red III under visible light irradiation than that of pure CsPb(Br 1‐ x Cl x ) 3 NCs. [ 45 ]…”

Section: Photocatalysis Applicationsmentioning

confidence: 99%

Perovskite Nanocrystals‐Based Heterostructures: Synthesis Strategies, Interfacial Effects, and Photocatalytic Applications

Yuan

et al. 2020

Solar RRL

Perovskite nanocrystals (PNCs) have recently emerged as a new type of promising photocatalytic semiconductor due to their unique photoelectrochemical properties, including tunable bandgap and crystal structure, entire visible spectral response, and versatile chemical processability. However, under practical circumstance, this type of pure‐phase PNCs photocatalyst demonstrates poor stability, limited light utilization, and high carrier recombination, resulting in low solar power conversion efficiency and inferior catalytic activity. To address these issues, extensive research efforts have been devoted to developing PNCs‐based heterostructures. Thus, a perspective on the development of PNCs‐based heterophotocatalysts is timely. In this Review, the progress of PNCs‐based heterophotocatalysts is presented starting from fundamental properties (i.e., crystal and bandgap structure, photoelectronic properties, etc.) to state‐of‐the‐art applications with a focus on stability improving, dispersion enhancing, and interfacial charge carrier dynamic optimizing. Critical insights are further provided into the existing challenges and prospects for high‐quality PNCs‐based heterostructures in advanced photocatalytic applications.

“…As known, the photocatalytic efficiency is mainly dependent on the following three factors, that is, light absorption, charge separation, and surface activity. Previous studies have revealed that the loading of noble metal cocatalyst on the surface of a photocatalyst can form a heterojunction structure accompanying with the local surface plasmon resonance, which can not only improve the visible light absorption but also facilitate charge separation. In view of this, Zhao et al constructed the Ag‐CsPbBr 3 /C 3 N 4 composites by loading nano‐Ag onto the surface of CsPbBr 3 /C 3 N 4 composite, to degrade 7‐aminocephalosporanic acid (7‐ACA) (a basic skeleton of cephalosporin antibiotics).…”

Section: Photoelectrochemical Applications Of Ihpqdsmentioning

confidence: 99%

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

Liang

Yao

et al. 2019

Small

Self Cite

135

Inorganic halide perovskite quantum dots (IHPQDs) have recently emerged as a new class of optoelectronic nanomaterials that can outperform the existing hybrid organometallic halide perovskite (OHP), II–VI and III–V groups semiconductor nanocrystals, mainly due to their relatively high stability, excellent photophysical properties, and promising applications in wide‐ranging and diverse fields. In particular, IHPQDs have attracted much recent attention in the field of photoelectrochemistry, with the potential to harness their superb optical and charge transport properties as well as spectacular characteristics of quantum confinement effect for opening up new opportunities in next‐generation photoelectrochemical (PEC) systems. Over the past few years, numerous efforts have been made to design and prepare IHPQD‐based materials for a wide range of applications in photoelectrochemistry, ranging from photocatalytic degradation, photocatalytic CO2 reduction and PEC sensing, to photovoltaic devices. In this review, the recent advances in the development of IHPQD‐based materials are summarized from the standpoint of photoelectrochemistry. The prospects and further developments of IHPQDs in this exciting field are also discussed.