海水淡化
降级(电信)
聚丙烯酰胺
蒸发器
双功能
化学工程
光催化
材料科学
太阳能淡化
废物管理
环境工程
化学
环境科学
工程类
催化作用
热交换器
有机化学
机械工程
膜
电气工程
生物化学
作者
Xinye Xu,Junxiao Qiu,Zheng Li,A.Q. Fu,Shutong Yuan,Hai Li,Baoyang Lu
出处
期刊:Desalination
[Elsevier BV]
日期:2025-04-16
卷期号:611: 118920-118920
被引量:10
标识
DOI:10.1016/j.desal.2025.118920
摘要
Integrating interfacial solar steam generation with photocatalytic degradation technology holds significant prospects for practical applications in simultaneous clean water collection and organic pollutant degradation. However, existing photothermal-photocatalytic bifunctional evaporators still suffer from performance deficiencies such as limited light absorption, insufficient evaporation rate and degradation efficiency, leading to the partial contaminant residual in complex wastewater. Herein, we propose a surface functionalization-bicrosslinking strategy to develop a novel photothermal-photocatalytic bifunctional hydrogel solar evaporator. The strategy involves surface functionalization of TiO 2 nanoparticles to form core-shell structured bifunctional TiO 2 @C nanoparticles by dopamine-modified thermal treatment, followed by composting with polyacrylamide/sodium alginate (PAM/SA) to achieve microporous double-network hydrogel. The resultant TiO 2 @C/PAM/SA hydrogel composites exhibit efficient sunlight absorption of up to 99.87 %, a remarkable evaporation rate of 2.97 kg m −2 h −1 with an outstanding photothermal efficiency of 92.13 %, as well as high photodegradation efficiency of 84.37 % under one sun irradiation. We further integrate such hydrogel composites into the fabrication of photothermal-photocatalytic bifunctional evaporators, which demonstrate efficient purification and photocatalytic efficacy in various water samples, including low-to-high concentrated brines and heavy metal ion/organic pollutant-containing wastewater. Such a strategy of designing high-performance photothermal-photocatalytic hydrogels opens a new avenue to coherent solar desalination and organic pollutant degradation for complicated seawater/wastewater systems. • Photothermal-photocatalytic bifunctional TiO 2 @C/PAM/SA hydrogel is proposed. • TiO 2 @C NPs are synthesized by surface functionalization. • A notable evaporation rate of 2.97 kg m −2 h −1 with 92.13 % photothermal efficiency. • An impressive 84.37 % photodegradation efficiency in organic pollutants.
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