Highly charged hydrogel with enhanced donnan exclusion toward ammonium for efficient solar-driven water remediation
文献类型： 外文期刊
作者： Xiao, Qingbo 1 ; Zhu, Yan 1 ; Xi, Yonglan 1 ; Kong, Xiangping 1 ; Ye, Xiaomei 1 ; Zhang, Zhiyang 1 ; Qiu, Cunpu 1 ; Xu, Wenlong 1 ; Cheng, Shuang 2 ; Zhang, Jing 3 ; Jia, Mingli 4 ; Sun, Enhui 1 ; Lin, Hongzhen 2 ; Wang, Jian 2 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China
2.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R China
3.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
4.Yuncheng Univ, Dept Phys & Elect Engn, Yuncheng 044000, Peoples R China
5.Helmholtz Inst Ulm, D-D89081 Ulm, Germany
6.Minist Agr & Rural Affairs, Key Lab Crop & Anim Integrated Farming, Beijing, Peoples R China
关键词： Solar evaporation; Ammonium rejection; Charged hydrogel; Water vapor generation; Donnan exclusion
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：16.744； 五年影响因子：14.61 ）
ISSN： 1385-8947
年卷期： 2022 年 430 卷
页码：
收录情况： SCI
摘要： Developing solar-driven photothermal materials with superior rejection capability toward volatile ammonium (NH4+) is a huge challenge but rather important for agricultural/municipal wastewater remediation. Herein, different from common hierarchical porosity designs, a positive charge-assisted Janus hydrogel evaporator with enhanced Donnan exclusion toward ammonium is uniquely achieved without sacrificing the water evaporation capability. The ammonium diffusion resistance of the so-fabricated Janus evaporator is significantly increased by optimizing the charge density and diffusion distance, yielding a high ammonium rejection rate up to 95%, which is never reported before. Meanwhile, the Janus evaporator also yields a water evaporation rate up to 3.3 kg m(-2)h(-1) for the natural wastewater via partial amorphization of cellulose I alpha allomorph, which is similar to 3 times faster than the previous photothermal materials for intercepting volatile phenol molecules. This work points out new avenues for the application of photothermal materials in separating freshwater from small volatile molecules using clean solar energy.
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