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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Fabrication of novel Ag/AgVO3/WO3 homojunction/heterojunction nanomaterials with highly enhanced photocatalytic activity-Investigation on type vertical bar plus Z-scheme mechanism
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Fabrication of novel Ag/AgVO3/WO3 homojunction/heterojunction nanomaterials with highly enhanced photocatalytic activity-Investigation on type vertical bar plus Z-scheme mechanism

机译：具有高度增强光催化活性的新型AG / AGVO3 / WO3同源条件/异质结纳米材料的制备 - 垂直杆型Z-Scheme机构的高度增强光催化活性研究

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摘要

A series of novel Ag/AgVO3/WO3 homojunction/heterojunction nanomaterials (denoted as AVW-x, x = 10, 20, 30, 40) were designed and synthesized by a simple coprecipitation method. Compared with the other materials, AVW-10 exhibited a unique photochemical performance with a wider absorption range, higher surface area and improved separation of charge carriers. The photocatalytic activity of AVW-10 for degrading RhB was investigated, and the apparent rate constant was 3.11 and 57.2 times higher than those of pure AgVO3 and WO3. Interestingly, the photostability of the recycled catalyst could be significantly enhanced by adding a small amount of benzoquinone (BQ) due to the interaction between BQ and the catalyst, indicating that this addition might be an efficient way to enhance the photoactivity by promoting the separation of photoinduced carriers. Furthermore, trapping experiments were designed and systematically explored, and center dot O-2(-) was identified as the main active species causing photocatalytic degradation of RhB. A new kind of type vertical bar plus Z-scheme mechanism was also proposed. (C) 2020 Elsevier B.V. All rights reserved.
机译：通过简单的CopRecipition方法设计和合成了一系列新型AG / AGO3 / WO3同质连接/异质结纳米材料（表示为AVW-X，X = 10,20,30,40）。与其他材料相比，AVW-10具有较宽的吸收范围，高表面积和改善的电荷载体分离的独特光化学性能。研究了用于降解RHB的AVW-10的光催化活性，表观速率常数比纯AgVO3和WO3高3.11和57.2倍。有趣的是，通过增加BQ和催化剂的相互作用，可以通过加入少量的苯醌（BQ）来显着提高再循环催化剂的光稳定性，表明这种添加可能是通过促进分离来增强光活性的有效方法光抑制载体。此外，设计和系统地设计了诱捕实验，并将中心点O-2（ - ）鉴定为导致RHB光催化降解的主要活性物质。还提出了一种新型垂直杆加Z方案机制。 （c）2020 Elsevier B.v.保留所有权利。

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