S‐g‐C 3 N 4 /N−TiO 2 @PTFE Membrane for Photocatalytic Degradation of Tetracycline

• Published in: ChemistrySelect (Weinheim) 2022-10, Vol.7 (40)
• Main Authors: You, Xuehui, Liu, Fang, Jiang, Guofei, Chen, Shuhua, An, Beiya, Cui, Rongli
• Format: Article
• Language: English
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202203024

Herein we synthesized S‐g‐C 3 N 4 and N−TiO 2 catalysts by hydrothermal and calcination technologies and SCN/NT@PTFE membrane by a vacuum filtration method. The morphology and composition of the synthesized materials were analyzed by different characterization methods (SEM/HRTEM/XRD/XPS/UV‐vis et.). The effects of different catalysts, pollutant concentrations, mass of catalyst and pH on the photo‐degradation of tetracycline were investigated. The degradation rate of tetracycline by SCN/NT‐2@PTFE membrane was as high as 99.9 % after 2 h of illumination. This was mainly because heterogeneous structure between S‐g‐C 3 N 4 and N−TiO 2 broadened the light absorption range and suppressed the carrier complex. Superoxide radicals (⋅O 2 − ) were proved to play a dominant role in the degradation reaction. After 20 days of stirring in water, the photocatalytic performance of membrane decreased slightly, demonstrating its good stability. The study of SCN/NT‐2@PTFE membrane provides a new direction for the development of photocatalysis and membrane.