Development of high quality Fe_3O_4/rGO composited electrode for low energy water treatment

作     者：Ngoc Tuan Trinh Sangho Chung Jae Kwang Lee Jaeyoung Lee 

作者机构：Electrochemical Reaction and Technology Laboratory School of Environmental Science and Technology Gwangju Institute of Science and Technology (GIST) Center for Chemical Energy Storage System Research Institute for Solar and Sustainable Energies GIST Ertl Center for Electrochemistry and Catalysis GIST 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2016年第25卷第3期

页      面：354-360页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

基　　金：supported by international cooperation program for science and technology funded by the Ministry of Science ICT&Future Planning(NRF-2014K1A3A1A09063208) 

主　　题：Electrochemical water treatment Capacitive deionization Water softening Grapheme Fe_3O_4/rGO nanocomposite Fe_3O_4 nanoparticle 

摘      要：Electrochemical water treatment is an attractive technology for water desalination and softening due to its low energy consumption. Especially, capacitive Deionization(CDI) is promising as a future technology for water treatment. Graphene(rGO) has been intensively studied for CDI electrode because of its advantages such as excellent electrical conductivity and high specific surface area. However, its 2D dimensional structure with small specific capacitance, high resistance between layers and hydrophobicity degrades ion adsorption efficiency. In this work, we successfully prepared uniformly dispersed Fe3O4/rGO nanocomposite by simple thermal reactions and applied it as effective electrodes for CDI. Iron oxides play a role in uniting graphene sheets, and specific capacitance and wettability of electrodes are improved significantly;hence CDI performances are enhanced. The hardness removal of Fe3O4/rGO nanocomposite electrodes can reach 4.3 mg/g at applied voltage of 1.5V, which is 3 times higher than that of separate r GO *** this material is a promising candidate for water softening technology.