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文献详情 >A cobalt oxide@polydopamine-re... 收藏

A cobalt oxide@polydopamine-reduced graphene oxide-based 3D photothermal evaporator for highly efficient solar steam generation

作     者:Ting Gao Xuan Wu Gary Owens Hao‑Lan Xu 

作者机构:Future Industries InstituteUniversity of South AustraliaAdelaideSA 5095Australia 

出 版 物:《Tungsten》 (钨科技(英文))

年 卷 期:2020年第2卷第4期

页      面:423-432页

核心收录:

学科分类:08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程(可授工学、理学学位)] 0703[理学-化学] 

基  金:This work was financially supported by Australian Research Council(Grant no.FT190100485) the Future Industries Institute,University of South Australia(RTIS Scholarship). 

主  题:Solar-steam generation Cobalt oxide Polydopamine Reduced graphene oxide Photothermal materials Seawater desalination 

摘      要:Improving the evaporation rate and energy efficiency of solar steam generation is very important to facilitate real-world applications for clean water production.In this work,Co_(3)O_(4)@polydopamine(PDA)nanoparticles were synthesized and combined with reduced graphene oxide(rGO)to fabricate a new Co_(3)O_(4)@PDA-rGO photothermal aerogel.The obtained pho-tothermal aerogel sheet was thereafter used to prepare both two-dimensional(2D)and three-dimensional(3D)photothermal evaporators for solar steam generation.Due to the excellent light absorption and hydrophilicity of the photothermal aerogel,a high evaporation rate of 1.60 kg·m^(−2)·h^(−1) was achieved for the 2D photothermal evaporator.While for the 3D evaporator,the evaporation rate was dramatically increased to 3.71 kg·m^(−2)·h^(−1) with a corresponding light-to-vapor energy efficiency of 107%.This was attributed to an increased evaporation surface area,decreased energy loss from the top evaporation surface to the environment,and energy gain from the environment on the side evaporation surface.The 3D evaporator also showed excellent practical performance in seawater desalination thus demonstrating great potential for real-world applications.

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