The preparation of three-dimensional flower-like TiO2/TiOF2 photocatalyst and its efficient degradation of tetracycline hydrochloride

Chentao Hou; Huayang Liu; Yijie Li

doi:10.1039/d1ra01772a

The preparation of three-dimensional flower-like TiO₂/TiOF₂ photocatalyst and its efficient degradation of tetracycline hydrochloride

RSC Adv. 2021 Apr 21;11(25):14957-14969. doi: 10.1039/d1ra01772a.

Authors

Chentao Hou¹, Huayang Liu¹, Yijie Li¹

Affiliation

¹ College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China 807484470@qq.com.

Abstract

A kind of high-efficiency photocatalyst of the three-dimensional flower-like TiO₂/TiOF₂ was synthesized by a one-step hydrothermal method. XRD, FE-SEM, EDS, HTEM, BET, XPS, PL, and UV-Vis-DRS were utilized to characterize the photocatalyst. The photocatalyst of TiO₂/TiOF₂ shows a narrow band gap of 2.8 eV. The generation of Ti³⁺ and an oxygen vacancy (O_v) in the photocatalyst are helpful to increase the absorption of visible light, and to inhibit faster charge recombination by capturing photogenerated carriers. Through the degradation of tetracycline hydrochloride (TCH) under simulated sunlight, the photocatalytic activity and stability of the synthesized samples were investigated. The results showed that the removal rate of tetracycline hydrochloride was 59% only in 0.5 h of dark reaction and 85% in 0.5 h of simulated sunlight. The removal efficiency of the photocatalyst for the adsorption and photocatalytic degradation of TCH is higher than that of the single TiO₂, TiOF₂, and Degussa P25. The synthesized three-dimensional flower-like TiO₂/TiOF₂ has great application potential in the treatment of antibiotic wastewater.