双金属金属有机框架上的 CdS 和 ZnS 纳米粒子双 Z 型异质结用于光催化制取 H2

IF 5.5 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wenya Zhang, Yongjian Xu, Yuning Wang, Xiaoyu Wu*, Xuanyuan Liu, Fang Guo, Qianhui Wu*, Chunsheng Li* and Ming Chen*, 
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引用次数: 0

摘要

构建异质结是获得所需光催化剂并提高其光催化活性的有效方法之一。本研究采用双金属 MOF 半活化策略合成了 ZnS/CdS/Zn-Cd-MOF 三元异质结构。研究了 ZnS/CdS/Zn-Cd-MOF 在可见光照射下的光催化氢气进化活性。其最大产氢速率为 27.65 mmol g-1 h-1,是纯 ZnS 纳米颗粒的 32 倍,纯 CdS 纳米颗粒的 13 倍。利用紫外可见 DRS、光致发光、表面光电压、Mott-Schottky 图和电子 EPR 等机理研究发现,ZnS、CdS 纳米颗粒和 Zn-Cd-MOF 之间形成了双 Z 型异质结构,提供了定向载流子迁移通道,进一步促进了电子传递,有效分离了光生载流子,显著提高了光催化活性和稳定性。本研究提出了一种合理的高效制氢双 Z 型异质结光催化剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Double Z-Scheme Heterojunctions of CdS and ZnS Nanoparticles on Bimetallic Metal–Organic Frameworks for Photocatalytic H2 Production

Double Z-Scheme Heterojunctions of CdS and ZnS Nanoparticles on Bimetallic Metal–Organic Frameworks for Photocatalytic H2 Production

Construction of a heterojunction is one of the promising methods for obtaining the required photocatalysts with enhanced photocatalytic activity. In this study, the ternary heterostructures of ZnS/CdS/Zn-Cd-MOF were synthesized using a semiderivatization of bimetallic MOF strategy. The photocatalytic hydrogen evolution activity of ZnS/CdS/Zn-Cd-MOF under visible light irradiation was investigated. Its maximum hydrogen production rate is 27.65 mmol g–1 h–1, which is 32 times that of pure ZnS nanoparticles and 13 times that of pure CdS nanoparticles. Mechanism studies using UV–visible DRS, photoluminescence, surface photovoltage, Mott–Schottky diagrams, and electron EPR reveal that the double Z-scheme heterostructure is formed between ZnS, CdS nanoparticles, and Zn-Cd-MOF, which provides a directional carrier migration channel, further promotes electron transfer, and effectively separates photogenerated carriers, which significantly improves photocatalytic activity and stability. This study proposes a reasonable double Z-scheme heterojunction photocatalyst with high efficiency for hydrogen production.

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来源期刊
CiteScore
8.30
自引率
3.40%
发文量
1601
期刊介绍: ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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