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用于污染物超快降解的BiOBr颗粒的可控合成及可见光驱动光催化活性

Controlled Synthesis and Visible-Light-Driven Photocatalytic Activity of BiOBr Particles for Ultrafast Degradation of Pollutants.

作者信息

Ji Xiaohui, Li Chen, Liu Junhai, Zhang Tianlei, Yang Yue, Yu Ruijin, Luo Xuegang

机构信息

School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China.

Shaanxi Province Key Laboratory of Catalysis, School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong 723001, China.

出版信息

Molecules. 2023 Jul 20;28(14):5558. doi: 10.3390/molecules28145558.

DOI:10.3390/molecules28145558
PMID:37513430
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10384163/
Abstract

For the purpose of regulating the visible-light-driven photocatalytic properties of photocatalysts, we selected BiOBr as the research target and various routes were used. Herein, via the use of a hydrothermal method with various solvents, BiOBr particles with controllable morphology and photocatalytic activities are obtained. In particular, through changing the volume ratio of ethylene glycol (EG) to ethanol (EtOH), BiOBr compounds possess microspheres, in which samples synthesized by using EG:EtOH = 1:2 have the highest photocatalytic activity, and can completely decompose RhB under visible light irradiation within 14 min. Furthermore, we also used different volume ratios of EG and HO reaction solvents to prepare BiOBr particles so as to further improve its pollutant removal ability. When the volume ratio of EG to HO is 1:1, the synthesized BiOBr particles have the best photocatalytic activity, and RhB can be degraded in only 10 min upon visible light irradiation. Aside from the reaction solvent, the impact of sintering temperature on the photocatalytic properties of BiOBr particles is also explored, where its pollutant removal capacities are restrained due to the reduced specific surface area. Additionally, the visible-light-triggered photocatalytic mechanism of BiOBr particles is determined by h, ·OH and ·O active species.

摘要

为了调控光催化剂的可见光驱动光催化性能，我们选择BiOBr作为研究对象，并采用了多种方法。在此，通过使用水热法并采用不同溶剂，获得了形貌和光催化活性可控的BiOBr颗粒。特别地，通过改变乙二醇（EG）与乙醇（EtOH）的体积比，BiOBr化合物呈现出微球结构，其中使用EG:EtOH = 1:2合成的样品具有最高的光催化活性，并且在可见光照射下14分钟内可完全分解罗丹明B（RhB）。此外，我们还使用不同体积比的EG和水（HO）反应溶剂来制备BiOBr颗粒，以进一步提高其污染物去除能力。当EG与HO的体积比为1:1时，合成的BiOBr颗粒具有最佳的光催化活性，在可见光照射下仅10分钟就能降解RhB。除了反应溶剂外，还探究了烧结温度对BiOBr颗粒光催化性能的影响，由于比表面积减小其污染物去除能力受到抑制。此外，BiOBr颗粒的可见光触发光催化机理由h、·OH和·O活性物种决定。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/7053882a0659/molecules-28-05558-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/f5668e3c7657/molecules-28-05558-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/d59f36ec7117/molecules-28-05558-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/0977c62ad70e/molecules-28-05558-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/3cc2330d6613/molecules-28-05558-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/05d5faf4341e/molecules-28-05558-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/284d39cf6f92/molecules-28-05558-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/e0309c962bea/molecules-28-05558-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/e97bd61fa5fe/molecules-28-05558-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/7053882a0659/molecules-28-05558-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/f5668e3c7657/molecules-28-05558-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/d59f36ec7117/molecules-28-05558-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/0977c62ad70e/molecules-28-05558-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/3cc2330d6613/molecules-28-05558-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/05d5faf4341e/molecules-28-05558-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/284d39cf6f92/molecules-28-05558-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/e0309c962bea/molecules-28-05558-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/e97bd61fa5fe/molecules-28-05558-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/11b5/10384163/7053882a0659/molecules-28-05558-g009.jpg

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