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

doi:10.1016/j.cjche.2023.04.021

Chinese Journal of Chemical Engineering ›› 2023, Vol. 63 ›› Issue (11): 120-129.DOI: 10.1016/j.cjche.2023.04.021

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

Zhongjiao Zha^1,2, Jun Wu³, Shaoping Tong¹, Xuebo Cao²

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:2024-01-08 Published:2023-11-28
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.

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

Zhongjiao Zha^1,2, Jun Wu³, Shaoping Tong¹, Xuebo Cao²

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

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.

Abstract

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

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

Zhongjiao Zha, Jun Wu, Shaoping Tong, Xuebo Cao. Photothermal-photocatalytic thin-layer flow system for synergistic treatment of wastewater[J]. Chinese Journal of Chemical Engineering, 2023, 63(11): 120-129.

Zhongjiao Zha, Jun Wu, Shaoping Tong, Xuebo Cao. Photothermal-photocatalytic thin-layer flow system for synergistic treatment of wastewater[J]. 中国化学工程学报, 2023, 63(11): 120-129.

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

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

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