Construction of Superhydrophilic/Superhydrophobic Composite Photocatalysts for Efficient Gas-Liquid-Solid Three-Phase Photocatalytic Degradation of Methyl Mercaptan

作     者：Yang, Zichang Xu, Yuyao He, Li Lu, Xingkai Yao, Xiaolong Li, Changming Gao, Hainan Yao, Zhiliang Wu, Chao 

作者机构：School of Light Industry Science and Engineering Beijing Technology and Business University Beijing100048 China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business University Beijing100048 China UKCRIC Advanced Infrastructure Materials Laboratory Department of Civil and Environmental Engineering Imperial College London South Kensington LondonSW7 2AZ United Kingdom School of Ecology and Environment 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Titanium dioxide 

摘      要：Photocatalytic oxidation technology holds considerable promise for effectively removing volatile organic compounds. However, conventional gas-solid photocatalytic technology faces significant limitations, including a low mineralization rate and incomplete degradation, leading to the accumulation of undesirable intermediate products. This study introduces an innovative gas-liquid-solid photocatalytic oxidation system that utilizes a superhydrophilic/superhydrophobic photocatalyst for the efficient removal of methyl mercaptan. By synthesizing superhydrophobic Cu-doped UiO-66 and combining with TiO2, the resulting OCUN/T photocatalysts was thoroughly chatacterized and tested under various conditions. The dynamic system consistently maintains a high removal rate (exceeding 99%) at flow rate of 50 ml/min and a substantial mineralization rate of methyl mercaptan over 10 hours operation. The removal efficiency of methyl mercaptan shows remarkable improvement under sunlight intensities exceeding 35×1000 lm. Furthermore, a detailed mechanism for its degradation through the gas-liquid-solid photocatalytic oxidation system is proposed, highlighting a novel and cost-effective approach for the VOCs removal. © 2024, The Authors. All rights reserved.