Fabrication of Two-Dimensional Bi<sub>2</sub>MoO<sub>6</sub> Nanosheet-Decorated Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> Type II Heterojunction and the Enhanced Photocatalytic Degradation of Antibiotics

Fabrication of Two-Dimensional Bi<sub>2</sub>MoO<sub>6</sub> Nanosheet-Decorated Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> Type II Heterojunction and the Enhanced Photocatalytic Degradation of Antibiotics

This article successfully synthesized a series of Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunctions using a two-step solvothermal method followed by calcination, and the photocatalytic activity by degra...

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Bibliographic Details
Main Authors: Fengshu Kang, Gaidong Sheng, Xiaolong Yang, Yan Zhang
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Inorganics
Subjects:
tetracycline degradation
type II heterojunction
Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>
Bi<sub>2</sub>MoO<sub>6</sub>
heterojunction photocatalyst
Online Access:https://www.mdpi.com/2304-6740/12/11/289
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Summary:This article successfully synthesized a series of Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunctions using a two-step solvothermal method followed by calcination, and the photocatalytic activity by degradation of tetracycline hydrochloride (TC) was investigated. Compared with pure Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> and Bi<sub>2</sub>MoO<sub>6</sub>, a series of Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunctions exhibit higher photocatalytic activity, which can be attributed to the heterostructures with strong interfacial interaction, improving the charge separation. The 2% Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunction shows the best photocatalytic activity under visible light irradiation, which is 1.9 times and 1.8 times that of Bi<sub>2</sub>MoO<sub>6</sub> and Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>, respectively. In addition, cyclic experiments have shown that 2% Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunction has high stability, with a degradation efficiency only decreasing by 3% after 5 cycles. From the capture agent experiment and ESR test, it can be seen that ·O<sub>2</sub><sup>−</sup> and h<sup>+</sup> are the main active species. A possible photocatalytic mechanism of 2% Bi<sub>2</sub>MoO<sub>6</sub>/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub> heterojunction under visible light irradiation was proposed.
ISSN:2304-6740

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