Rationally Designed Bi2M2O9 (M = Mo/W) Photocatalysts with Significantly Enhanced Photocatalytic Activity

Fangzhi Wang; Xiaoyan Zhou; Jing Li; Qiuyue He; Ling Zheng; Qing Liu; Yan Chen; Guizhai Zhang; Xintong Liu; Hongda Li

doi:10.3390/molecules26237334

Molecules (Dec 2021)

Rationally Designed Bi2M2O9 (M = Mo/W) Photocatalysts with Significantly Enhanced Photocatalytic Activity

Fangzhi Wang,
Xiaoyan Zhou,
Jing Li,
Qiuyue He,
Ling Zheng,
Qing Liu,
Yan Chen,
Guizhai Zhang,
Xintong Liu,
Hongda Li

Affiliations

Fangzhi Wang: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Xiaoyan Zhou: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Jing Li: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Qiuyue He: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Ling Zheng: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Qing Liu: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Yan Chen: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Guizhai Zhang: School of Resources and Environmental Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
Xintong Liu: School of Light Industry, Beijing Technology and Business University, Beijing 100048, China
Hongda Li: School of Microelectronics and Materials Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China

DOI: https://doi.org/10.3390/molecules26237334
Journal volume & issue: Vol. 26, no. 23
p. 7334

Abstract

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Novel Bi2W2O9 and Bi2Mo2O9 with irregular polyhedron structure were successfully synthesized by a hydrothermal method. Compared to ordinary Bi2WO6 and Bi2MoO6, the modified structure of Bi2W2O9 and Bi2Mo2O9 were observed, which led to an enhancement of photocatalytic performance. To investigate the possible mechanism of enhancing photocatalytic efficiency, the crystal structure, morphology, elemental composition, and optical properties of Bi2WO6, Bi2MO6, Bi2W2O9, and Bi2Mo2O9 were examined. UV-Vis diffuse reflectance spectroscopy revealed the visible-light absorption ability of Bi2WO6, Bi2MO6, Bi2W2O9, and Bi2Mo2O9. Photoluminescence (PL) and photocurrent indicated that Bi2W2O9 and Bi2Mo2O9 pose an enhanced ability of photogenerated electron–hole pairs separation. Radical trapping experiments revealed that photogenerated holes and superoxide radicals were the main active species. It can be conjectured that the promoted photocatalytic performance related to the modified structure, and a possible mechanism was discussed in detail.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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