Synthesis of novel ternary heterogeneous BiOCl/TiO2 /sepiolite composite with enhanced visible-light-induced photocatalytic activity towards tetracycline

Journal of Colloid and Interface Science
Xiaolong HuShuilin Zheng

Abstract

In this study, the novel ternary heterogeneous BiOCl/TiO2/sepiolite composite with enhanced visible-light-induced photocatalytic activity was synthesized via the hydrolysis precipitation method followed by a calcination crystallization process. The as-prepared samples were characterized by X-ray diffraction (XRD), UV-VIS diffused reflectance spectroscopy (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption-desorption, X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL), respectively. Compared with bare BiOCl and TiO2, the ternary heterogeneous structure in BiOCl/TiO2/sepiolite significantly improved the visible-light-induced photocatalytic performance towards tetracycline (TC), and also contributed to the separation efficiency and recyclability of the photocatalyst. In addition, the influence of the mass ratio of BiOCl in the composites was also discussed, and the optimal mass ratio is identified as 50% (mBiOCl/(mTiO2 + mBiOCl). Furthermore, TC degradation by-products were further detected by HPLC-MS/MS, and a possible degradation pathway was proposed. Besides, ESR (Electron spin resonance) results indicated that the main active radical species were photo-induced holes (...Continue Reading

Citations

Aug 1, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Bin YangXin Jia
Aug 7, 2019·Environmental Science and Pollution Research International·Zhiming SunBin Wang
Nov 5, 2020·Environmental Science and Pollution Research International·Lihua YangFangzhou Jiang
Dec 24, 2021·The Science of the Total Environment·Xiangwei TangChanjuan Liao

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