Work

Construction of a self-floating fabric based on CVD-assisted coating and its application in interfacial evaporation

Year: 2024

Type: article

Abstract: The discharge of industrial wastewater and the shortage of fresh water resources are increasingly endangering human daily life. In this experiment, bismuth oxychloride with oxygen vacancies was attached to a fabric surface using the solution deposition method, and then perfluoro-trichlorosilane was grafted on the surface to prepare a multifunctional superhydrophobic fabric. After mechanical stability testing, the fabric retained a water contact angle that consistently exceeded 150°, which could realize the selective adsorption of insoluble oil such as cyclohexane . Through a capture experiment of active species, the conclusion drawn was that holes (h + ) and superoxide free radicals (·O 2 − ) were primary active species for the photocatalytic degradation process. After 4 cycles of photodegradation , the degradation efficiency could still reach 92.8 %, showing excellent cyclic degradation stability. An interfacial solar steam generator (ISSG) was assembled using the superhydrophobic fabric as the support layer and a polypyrrole sponge as the photothermal layer, whose evaporation efficiency under one sun reached 2.8376 kg·m −2 ·h −1 , with a photothermal conversion efficiency of 92.255 %. This ISSG demonstrates excellent wastewater purification capabilities. Interfacial evaporation devices show promising prospects in solar-powered wastewater purification, which further expand the use of interfacial evaporation to solve the problem of water scarcity.

Source: Progress in Organic Coatings

DOI: 10.1016/j.porgcoat.2024.108959

Authors: Jianbo Zhang, Zhijun Zhou, Bo Ge, Guina Ren, Tonghui Zhang, Zhaozhu Zhang