Solar-driven water evaporation is considered to be a viable and very efficient technology for fresh water production.Unfortunately,the photothermal membrane has a low absorptivity,low photothermal conversion and poor recyclability,which are difficult to meet the demands of self-floating solar driven evaporators in practical applications.Herein,a hierarchical nanostructure Ni3S2 has been prepared by in-situ growing method on Ni foam(NF),which shows excellent absorptivity,outstanding recyclable and high mechanically durable properties.The photo-thermal membrane was composed of hierarchical nanostructure Ni3S2@NF,which exhibited excellent solar absorption(93.13％)in the wavelength range of 250-2500 nm and sustained anti-corrosion capacity for one month.In addition,the hierarchical nanostructure Ni3S2@NF has good hydrophilicity and strong binding force,indicating this photothermal membrane exhibits good stability and outstanding photothermal conversion efficiency.An evaporation system based on 3D Ni3S2@NF membrane exhibited excellent water evaporation ability,the highest water evaporation rate(1.53 kg m-2 h-1)and the photothermal conversion efficiency(84.7％)under 1 sun illumination.In the desalination experiment,the water evaporation rate and photothermal conversion efficiency almost keep constant over 5 cycles tests and do not decrease compared with the experiment in pure water.This result demonstrated that the Ni3S2@NF membrane has shown good corrosion resistance and outstanding recyclability.Due to the simple preparation method,low cost,outstanding recyclability and high mechanical durability in the sea water,this Ni3S2@NF membrane have great potential for long-term solar distillation applications.

Zhongping Yao;Kailun Yu;Mengyao Pan;Hongbo Xu;Tianqi Zhao;Zhaohua Jiang

School of Chemistry and Chemical Engineering,State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin,150001,China

绿色能源与环境（英文）

[1]Zhongping Yao;Kailun Yu;Mengyao Pan;Hongbo Xu;Tianqi Zhao;Zhaohua Jiang-.A mechanically durable,excellent recyclable 3D hierarchical Ni3S2@Ni foam photothermal membrane)[J].绿色能源与环境（英文）,2022(03):492-499

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