SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 63 ›› Issue (11): 120-129.DOI: 10.1016/j.cjche.2023.04.021

• Full Length Article • 上一篇    下一篇

Photothermal-photocatalytic thin-layer flow system for synergistic treatment of wastewater

Zhongjiao Zha1,2, Jun Wu3, Shaoping Tong1, Xuebo Cao2   

  1. 1. College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China;
    2. College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China;
    3. College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing 314001, China
  • 收稿日期:2022-11-23 修回日期:2023-04-14 出版日期:2023-11-28 发布日期:2024-01-08
  • 通讯作者: Jun Wu,E-mail:wujun_n@zjxu.edu.cn;Shaoping Tong,E-mail:sptong@zjut.edu.cn;Xuebo Cao,E-mail:xbcao@zjxu.edu.cn
  • 基金资助:
    This work was supported by Scientific Research Fund of Zhejiang Provincial Education Department (Y202250501), and SRT Research Project of Jiaxing Nanhu University, which are gratefully acknowledged.

Photothermal-photocatalytic thin-layer flow system for synergistic treatment of wastewater

Zhongjiao Zha1,2, Jun Wu3, Shaoping Tong1, Xuebo Cao2   

  1. 1. College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China;
    2. College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China;
    3. College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing 314001, China
  • Received:2022-11-23 Revised:2023-04-14 Online:2023-11-28 Published:2024-01-08
  • Contact: Jun Wu,E-mail:wujun_n@zjxu.edu.cn;Shaoping Tong,E-mail:sptong@zjut.edu.cn;Xuebo Cao,E-mail:xbcao@zjxu.edu.cn
  • Supported by:
    This work was supported by Scientific Research Fund of Zhejiang Provincial Education Department (Y202250501), and SRT Research Project of Jiaxing Nanhu University, which are gratefully acknowledged.

摘要: The integration of the photocatalytic effect into solar steam is highly desirable for addressing freshwater shortages and water pollution. Here, a ternary film structure for the adsorption and photothermal and photocatalytic treatment of wastewater was designed by combining the technique of self-assembled carbon nano paper with a nitrogen composite titanium dioxide (N-TiO2) deposited on the surface of carbon nanotubes (CNT) using polyvinylidene fluoride (PVDF) as a substrate. The photogeneration of reactive oxygen species can be promoted by rapid oxygen diffusion at the three-phase interface, whereas the interfacial photothermal effect promotes subsequent free radical reactions for the degradation of rhodamine B (93%). The freshwater evaporation rate is 1.35 kg·m-2·h-1 and the solar-to-water evaporation efficiency is 94%. Importantly, the N-TiO2/CNT/PVDF (N-TCP) film not only effectively resists mechanical damage from the environment and maintains structural integrity, but can also be made into a large film for outdoor experiments in a large solar energy conversion device to collect fresh water from polluted water and degrade organic dyes in source water simultaneously, opening the way for applications in energy conversion and storage.

关键词: Wastewater disposal, Solar-driven distill, Thin-layer flow, Clean water production, Ternary film

Abstract: The integration of the photocatalytic effect into solar steam is highly desirable for addressing freshwater shortages and water pollution. Here, a ternary film structure for the adsorption and photothermal and photocatalytic treatment of wastewater was designed by combining the technique of self-assembled carbon nano paper with a nitrogen composite titanium dioxide (N-TiO2) deposited on the surface of carbon nanotubes (CNT) using polyvinylidene fluoride (PVDF) as a substrate. The photogeneration of reactive oxygen species can be promoted by rapid oxygen diffusion at the three-phase interface, whereas the interfacial photothermal effect promotes subsequent free radical reactions for the degradation of rhodamine B (93%). The freshwater evaporation rate is 1.35 kg·m-2·h-1 and the solar-to-water evaporation efficiency is 94%. Importantly, the N-TiO2/CNT/PVDF (N-TCP) film not only effectively resists mechanical damage from the environment and maintains structural integrity, but can also be made into a large film for outdoor experiments in a large solar energy conversion device to collect fresh water from polluted water and degrade organic dyes in source water simultaneously, opening the way for applications in energy conversion and storage.

Key words: Wastewater disposal, Solar-driven distill, Thin-layer flow, Clean water production, Ternary film