Recyclable Fe_(3)O_(4)@Polydopamine(PDA) nanofluids for highly efficient solar evaporation

作     者：Qingmiao Wang Yi Qin Feifei Jia Shaoxian Song Yanmei Li Qingmiao Wang;Yi Qin;Feifei Jia;Shaoxian Song;Yanmei Li

作者机构：Hubei Key Laboratory of Mineral Resources Processing and EnvironmentWuhan University of TechnologyWuhanHubei Province430070China Department of MinesMetallurgy and Geology EngineeringUniversity of GuanajuatoGuanajuato36000Mexico School of Resources and Environmental EngineeringWuhan University of TechnologyWuhanHubei Province430070China 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2022年第7卷第1期

页      面：35-42页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0824[工学-船舶与海洋工程] 

基　　金：financial support from the National Natural Science Foundation of China(No.51704220 No.51974216 and No.51674183)for this work 

主　　题：Fe_(3)O_(4)@Polydopamine Nanofluids Volumetric solar evaporation Recyclability 

摘      要：Volumetric solar evaporations by using light-absorbing nanoparticles suspended in liquids(nanofluids)as solar absorbers have been widely regarded as one of the promising solutions for clean water production because of its high efficiency and low capital cost compared to traditional solar distillation systems.Nevertheless,previous solar evaporation systems usually required highly concentrated solar irradiation and high capital cost,limiting the practical application on a large scale.Herein,for the first time in this work,polydopamine(PDA)-capped nano Fe_(3)O_(4)(Fe_(3)O_(4)@PDA)nanofluids were used as solar absorbers in a volumetric system for solar evaporation.The introduction of organic PDA to nano Fe_(3)O_(4)highly contributed to the high light-absorbing capacity of over 85%in wide ranges of 200–2400 nm because of the existence of numerous carbon bonds and pi(π)bonds in PDA.As a result,high evaporation efficiency of 69.93%under low irradiation of 1.0 kW m^(-2)was achieved.Compared to other nanofluids,Fe_(3)O_(4)@PDA nanofluids also provided an advantage in high unit evaporation rates.Moreover,Fe_(3)O_(4)@PDA nanofluids showed excellent reusability and recyclability owing to the preassembled nano Fe_(3)O_(4),which significantly reduced the material consumptions.These results demonstrated that the Fe_(3)O_(4)@PDA nanofluids held great promising application in highly efficient solar evaporation.