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Photocatalytic Degradation of Antibiotics in Water by Pollution-free Photocatalytic Films with a Three-dimensional Layered Structure and the Reaction Mechanism Study by Bing Wang; Qingtong Cao; Ming Cheng; Guomin Li; Jian Zhang; Hong Jiang is a Environmental Science article available to read on EtoBox.

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Although powdered photocatalysts has shown high degradation efficiency in photocatalytic reactions, their practical applications are limited by the poor recovery of powder. To improve its recycling performance, a three-dimensional layered photocatalytic fiber membrane was newly designed through electrospinning and coating process. The composition of the photocatalytic membrane was polyacrylonitrile (PAN), polydopamine (PDA) and Tb doping graphitized carbon nitride/ZnIn2S4 (Tb-g-C3N4/ZnIn2S4) from bottom to top. The photocatalytic performance of the prepared composite membranes was investigated under simulating sunlight. Compared to the prepared PAN@Tb-g-C3N4 (PT), PAN@PDA/Tb-g-C3N4 (PPT) and monolithic PAN@PDA/Tb-g-C3N4/ZnIn2S4 (PPTZ), the PPTZ displayed the highest photocatalytic ability. The degradation rates of PPTZ for tylosin (TYL) and tetracycline (TC) were approximately 2.1 and 2.5 times than that of other samples. The superior photocatalytic activity of the PPTZ sample resulted from the formation of a heterostructure among Tb-g-C3N4, ZnIn2S4 and PDA, which significantly inhibited the recombination of photogenerated carriers. PDA could act as an electron transfer medium so t

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Author

Bing Wang; Qingtong Cao; Ming Cheng; Guomin Li; Jian Zhang; Hong Jiang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)