期刊
WATER RESEARCH
卷 244, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2023.120514
关键词
Solar-driven interfacial evaporation; Water purification; Internal convection flow; Environmental energy; Phenol removal
This study presents a three-dimensional bifunctional evaporator based on N-doped carbon (CoNC/CF) that can separate volatile organic compounds (VOCs) from fresh water by activating peroxymonosulfate (PMS). The evaporator achieves a high evaporation rate and satisfactory purification performance, making it a promising platform for wastewater treatment.
Solar-driven interfacial evaporation for water purification is limited by the structural design of the solar evaporator and, more importantly, by the inability to separate the water from volatile organic compounds (VOCs) present in the water source. Here, we report a three-dimensional (3D) bifunctional evaporator based on N-doped carbon (CoNC/CF), which enables the separation of fresh water from VOCs by activating PMS during the evaporation process with a VOC removal rate of 99%. There is abundant van der Waals interaction between peroxymonosulfate (PMS) and CoNC/CF, and pyrrolic N is confirmed as the active site for binding phenol, thus contributing to the separation of phenol from water. With the advantageous features of sufficient light absorption, adequate water storage capacity, and spontaneous internal convection flow on its top surface, the 3D evaporator achieves a high evaporation rate under one sun (1 kW/m2) at 3.16 kg/m2/h. More notably, through careful structural design, additional energy from the environment and water can be utilized. With such a high evaporation rate and satisfactory purification performance, this work is expected to provide a promising platform for wastewater treatment.
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