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用于可见光增强产氢的等离子体金属/半导体异质结构

Plasmonic Metal/Semiconductor Heterostructure for Visible Light-Enhanced H Production.

作者信息

Khanam Shomaila, Rout Sanjeeb Kumar

机构信息

Department of Physics, Birla Institute of Technology, Mesra, Ranchi, Jharkhand 835215, India.

出版信息

ACS Omega. 2022 Jul 14;7(29):25466-25475. doi: 10.1021/acsomega.2c02459. eCollection 2022 Jul 26.

DOI:10.1021/acsomega.2c02459
PMID:35910098
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9330258/
Abstract

A plasmonic Ag/BiWO heterostructure, having Ag NPs deposited on BiWO, is obtained by a hydrothermal and photodeposition method. The synthesized Ag/BiWO composite exhibits strong visible light absorption with a localized surface plasmon resonance (LSPR) and shows an enhanced photoabsorption property. It is demonstrated that such a Ag/BiWO heterostructure shows excellent plasmon-enhanced photocatalytic activity in the dehydrogenation of ammonia borane (NHBH) solution under visible light irradiation, which is due to the results from the synergetic effect between Ag NPs and emerging W ions. More importantly, the performance of a Ag/BiWO hybrid is almost eight times higher than that of sole BiWO nanosheets. The introduction of LSPR of Ag in BiWO improves the electrical conductivity of the composite and lowers the recombination rate of charge carriers. This study opens up the opportunity of rationally fabricating plasmonic metal/semiconductor heterostructures for highly efficient photocatalysis.

摘要

通过水热和光沉积法制备了一种等离子体Ag/BiWO异质结构，其中Ag纳米颗粒沉积在BiWO上。合成的Ag/BiWO复合材料表现出强烈的可见光吸收以及局域表面等离子体共振（LSPR），并显示出增强的光吸收性能。结果表明，这种Ag/BiWO异质结构在可见光照射下对氨硼烷（NHBH）溶液的脱氢反应表现出优异的等离子体增强光催化活性，这是由于Ag纳米颗粒与新出现的W离子之间的协同效应所致。更重要的是，Ag/BiWO复合材料的性能几乎是单一BiWO纳米片的八倍。BiWO中Ag的LSPR的引入提高了复合材料的电导率并降低了电荷载流子的复合率。这项研究为合理制备用于高效光催化的等离子体金属/半导体异质结构提供了机会。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/402c/9330258/c8f6d75a0e1e/ao2c02459_0009.jpg
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