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具有增强的可见光驱动光催化活性的BiMoO/BiVO异质结光催化剂的合成。

The synthesis of a BiMoO/BiVO heterojunction photocatalyst with enhanced visible-light-driven photocatalytic activity.

作者信息

Ri Chol-Nam, Kim Song-Gol, Ju Kyong-Sik, Ryo Hyok-Su, Mun Chol-Ho, Kim U-Hyon

机构信息

Institute for Electronic Materials, Kim Il Sung University Pyongyang Democratic People's Republic of Korea.

School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 China

出版信息

RSC Adv. 2018 Jan 31;8(10):5433-5440. doi: 10.1039/c7ra12766a. eCollection 2018 Jan 29.

DOI:10.1039/c7ra12766a
PMID:35542393
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9078112/
Abstract

A novel BiMoO/BiVO heterostructured photocatalyst was successfully fabricated using a facile one-pot solvothermal method. This heterojunction consists of homogeneous dispersed BiVO nanocrystals anchored on the surface of BiMoO nanoflakes, endowing the heterojunction with nanosized interfacial contact. Based on the favorable interfacial contact, the band alignment at the heterojunction effectively facilitated photo-generated carrier transfer, which was verified by photoelectrochemical and photoluminescence measurements. Thereby, in contrast with pristine BiMoO and BiVO, the as-synthesized heterojunction with nanoscale contact exhibited significantly enhanced photocatalytic activity towards the degradation of MB and the reduction of Cr(vi). In addition, the as-fabricated BiMoO/BiVO heterojunction exhibited good cycling stability for MB degradation after 4 cycles. Finally, a plausible photocatalytic mechanism for MB degradation over the BiMoO/BiVO heterojunction was discussed in detail. This work not only reports a highly efficient photocatalyst but also sheds light on the design and optimization of a heterojunction.

摘要

采用简便的一锅溶剂热法成功制备了一种新型的BiMoO/BiVO异质结构光催化剂。这种异质结由均匀分散在BiMoO纳米片表面的BiVO纳米晶体组成，赋予异质结纳米级的界面接触。基于良好的界面接触，异质结处的能带排列有效地促进了光生载流子的转移，这通过光电化学和光致发光测量得到了验证。因此，与原始的BiMoO和BiVO相比，合成的具有纳米级接触的异质结对亚甲基蓝（MB）的降解和Cr(Ⅵ)的还原表现出显著增强的光催化活性。此外，制备的BiMoO/BiVO异质结对MB降解在4个循环后表现出良好的循环稳定性。最后，详细讨论了BiMoO/BiVO异质结上MB降解的合理光催化机理。这项工作不仅报道了一种高效的光催化剂，还为异质结的设计和优化提供了思路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/7eb45531217d/c7ra12766a-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/7eb45531217d/c7ra12766a-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/32bdaa755fd7/c7ra12766a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/322f991cdee0/c7ra12766a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/a8507071b05d/c7ra12766a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/d91406602e8b/c7ra12766a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/8544813419cf/c7ra12766a-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/1df1506e4f80/c7ra12766a-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6103/9078112/7eb45531217d/c7ra12766a-s1.jpg

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