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Construction of Bi2O3/Bi28O32(SO4)10 three-dimensional microsphere heterojunction and the photoelectrocatalysis performance by Qiang Bi; Chenxuan Dang; Zengqiang Wang; Zekun Zhang; Guangdong Wu; Wen Cheng; Juanqin Xue is a Materials Science article available to read on EtoBox.

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Through electrodeposition and annealing, a Bi2O3/Bi28O32(SO4)10/FTO photoelectrode with three-dimensional spherical morphology was prepared. X-ray diffraction characterization (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Transmission electron microscope (TEM), ultraviolet diffuse reflection spectrum (DRS), electrochemicalimpedance (EIS), photoluminescence (PL), transient state photocurrent, Mott-Schottky and other methods were carried out to characterize the elemental composition, crystal morphology and optical properties, as well as the photocatalytic performance, respectively. The results showed that the film contains Bi, O and S elements. Bi2O3/Bi28O32(SO4)10/FTO electrode was 10.5 times the photocurrent density of the Bi28O32(SO4)10/FTO electrode and 2.15 times the photocatalytic degradation efficiency. Capture experiments showed that hydroxyl radicals ( OH) and holes (h+) are the main reactants in the degradation process. The Bi2O3/Bi28O32(SO4)10/FTO composite electrode has good stability. After four degradation cycles, the removal rate of methylene blue was basically unchanged. The increase in photocatalytic activity is attributed to the

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Author

Qiang Bi; Chenxuan Dang; Zengqiang Wang; Zekun Zhang; Guangdong Wu; Wen Cheng; Juanqin Xue

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)