Boosted photocatalytic performance of OVs-rich BiVO4 hollow microsphere self-assembled with the assistance of SDBS

Tingting Zhang; Huan Li; Xiaoqian Tang; Junbo Zhong; Jianzhang Li; Shulin Zhang; Shengtian Huang; Lin Dou

doi:10.1016/j.jcis.2022.12.057

Boosted photocatalytic performance of OVs-rich BiVO₄ hollow microsphere self-assembled with the assistance of SDBS

J Colloid Interface Sci. 2023 Mar 15:634:874-886. doi: 10.1016/j.jcis.2022.12.057. Epub 2022 Dec 14.

Authors

Tingting Zhang¹, Huan Li¹, Xiaoqian Tang², Junbo Zhong³, Jianzhang Li⁴, Shulin Zhang², Shengtian Huang², Lin Dou¹

Affiliations

¹ Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
² College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
³ Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China; College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China. Electronic address: junbozhong@suse.edu.cn.
⁴ Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China. Electronic address: lyl63@sina.com.

PMID: 36566633
DOI: 10.1016/j.jcis.2022.12.057

Abstract

In this study, monoclinic phase bismuth vanadate (BiOV₄) photocatalyst with unique hollow microsphere morphology was successfully prepared by a hydrothermal method in the existence of sodium dodecyl benzene sulfonate (SDBS). The prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron (SEM) and X-ray photoelectron spectrometer (XPS) and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). Experimental results show that SDBS definitely changes the microstructure of BiVO₄, which is allocated to the template role of SDBS in the preparation process. Moreover, the hydrothermal treatment time is also of crucial importance in affecting the structure and morphology of the photocatalysts, and the optimal hydrothermal treatment time for the formation of hollow microsphere is 24 h. Furthermore, the feasible growth mechanism for hollow microsphere was elaborated. Enriched oxygen vacancies (OVs) are introduced into BiOV₄ prepared with SDBS, largely elevating the separation efficiency of photo-generated charges. Under visible light irradiation, the photocatalytic activities of BiOV₄ for destruction of rhodamine (RhB) were evaluated. The photocatalytic degradation rate constant of RhB on the 3SBVO is 2.23 times of that on the blank BiOV₄ as the mass ratio of SDBS/BiOV₄ is 3 %. Photocatalytic degradation mechanism of BiVO₄ toward detoxification of organic pollutants was presented.

Keywords: BiVO(4); Hollow microsphere; Oxygen vacancies; Photocatalytic performance; SDBS.