Coal-based carbon foam coated with F-TiO2 for photocatalytic degradation of phenol

被引：0
|
作者：
Yang X. [1 ]
Liu X. [1 ]
Yang Y. [1 ]
Ye Y. [1 ]
Jia Q. [1 ]
Yang H. [1 ]
Qin Z. [1 ]
机构：
[1] School of Chemical Engineering & Technology, China University of Mining and Technology, Jiangsu, Xuzhou
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 12期
关键词：
coal-based carbon foam; F doping; phenol; photocatalytic degradation; TiO[!sub]2[!/sub;
D O I：
10.11949/0438-1157.20230834
中图分类号：
学科分类号：
摘要：
Fluorine-doping of TiO2 (F-TiO2) was prepared by using solvothermal method and subsequent soaking in KF solution, and hierarchical porous carbon foam (CCF) was prepared by using coal loose medium component as raw material. A composite photocatalyst F-TiO2/CCF was then prepared by impregnating F-TiO2 onto CCF. With phenol as the target pollution, the effects of F ion concentration, soaking time and activation time of CCF on the catalytic performance of the catalysts were studied. The samples were characterized by using XRD, XPS, SEM, N2 adsorption, UV-Vis-DRS, etc. The results showed that the optimized preparation conditions of F-TiO2/CCF were 0.1 mol/L of KF concentration, 24 h of soaking time, and 1 h of steam activation of CCF. The prepared composite catalyst had a photodegradation rate of 76% for phenol under 6 h of simulated sunlight which was 2.7 times higher than that of F-TiO2 nanoparticles, and a total removal rate of 89%. After four consecutive degradation cycles, the removal rate of phenol remained around 84%. The strong electronegativity of doped fluorine atoms make the Ti in F-TiO2 more positive, which is more conducive to coordinate with oxygen atoms in phenol. While the CCF support not only promotes the separation of photoexcited carriers, but also ensures the effective use of light and the rapid adsorption and diffusion of phenol due to its macro/meso/micro porous structure. All these factors contribute to the significant improvement of the photocatalytic performance of F-TiO2/CCF. © 2023 Materials China. All rights reserved.
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页码：4914 / 4925
页数：11
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