摘要
具有除菌性能的电容去离子材料对于制备高效节能同时具备脱盐和抗微生物污染功能的电极材料至关重要,然而由于双电层电吸附机制的影响,多数碳基材料的吸附容量受到限制.同时,近年来部分研究学者通过对电极材料进行抗菌化合物的修饰并用于电容法水除菌已得到证明.因此为了实现高效、低成本的同时实现电容脱盐和除菌,本研究提出了一种简便的方法制备氧化石墨烯/聚苯胺/普鲁士蓝纳米复合材料作为类法拉第电极用于电容去离子和水消毒应用.所合成的电极材料具有较高的BET表面积(148.08m^(2)g^(-1))、介孔体积(34.02cm^(3)g^(-1))和孔体积(0.66cm^(3)g^(-1)),在1Ag^(-1)下的脱盐容量为91.6mgg^(-1),脱盐率为3.05mgg^(-1)min^(-1).此外,在未添加额外消毒剂的情况下,该复合材料所制备的电极能有效去除和灭活94.0%±3.1%的大肠杆菌,其杀菌效率是活性炭电极的7倍.本研究对未来将普鲁士蓝基复合材料的法拉第电极用于高效环保海水淡化和消毒材料的应用奠定了研究基础.
Capacitive deionization(CDI)with water dis-infection materials is an energy-efficient technology for the simultaneous desalination and bio-decontamination of brackish water.However,desalination capacity is always lim-ited by the mechanism of ion electrosorption within the electrical double layer.Recently,the water disinfection ability of CDI has been demonstrated through the functionalization of electrode materials with antimicrobial compounds.To achieve highly efficient and low-cost capacitive deionization and disinfection(CDID)performance,we propose a facile strategy for the fabrication of a graphene oxide/polyaniline/Prussian blue(GO/PANI/PB)nanocomposite.This nano-composite exhibits a high Brunauer-Emmett-Teller surface area(148.08 m^(2) g^(-1)),mesopore volume(34.02 cm^(3) g^(-1)),and pore volume(0.66 cm^(3) g^(-1)),making it suitable as a Faradaic electrode in the CDI and CDID systems.The obtained GO/PANI/PB electrode exhibits a high desalination capacity of 91.6 mg g^(-1) and superior desalination ratio of 3.05 mg g^(-1) min^(-1) at 1 A g^(-1).Furthermore,the GO/PANI/PB electrode has a bacterial(Escherichia coli)removal and in-activation efficiency of 94.0%±3.1%without the use of other disinfectants.This is~7 times higher than the antibacterial efficiency of active carbon electrodes under the same CDI conditions.The proposed strategy is the first to exploit si-multaneous deionization and disinfection without using dis-infectants,offering the potential of using PB-based Faradaic electrodes for eco-friendly and high-efficiency water desali-nation and disinfection in future CDID technology.
作者
李南
任攀宇
田苗
王科
Atif Saleem
刘念
余骆峰
李鹏
Nan Li;Panyu Ren;Miao Tian;Ke Wang;Atif Saleem;Nian Liu;Luofeng Yu;Peng Li(Frontiers Science Center for Flexible Electronics(FSCFE),Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&Engineering(IBME),Northwestern Polytechnical University(NPU),Xi’an 710072,China;School of Ecology and Environment,Northwestern Polytechnical University(NPU),Xi’an 710072,China)
基金
financially supported by the National Key R&D Program of China (2017YFA0207202)
the National Natural Science Foundation of China (52073230)
the Joint Research Funds of Department of Science&Technology of Shaanxi Province and Northwestern Polytechnical University (2020GXLH-Z-013)
the Fundamental Research Funds for the Central Universities。
