活性炭基微孔炭膜制备及电化学性能  

Preparation of activated carbon based microporous carbon membranes and its electrochemical properties

作　　者：熊鸽 王虹[1] 惠洪森 李建新[1] 王同华[2] XIONG Ge;WANG Hong;HUI Hongsen;LI Jianxin;WANG Tonghua(State Key Laboratory of Separation Membranes and Membrane Processes,National Center for International Joint Research on Separation Membranes,Tianjin Polytechnic University,Tianjin 300387,China;School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]天津工业大学分离膜与膜过程国家重点实验室,分离膜科学与技术国际联合研究中心,材料科学与工程学院,天津300387 [2]大连理工大学化工学院,大连116024

出　　处：《膜科学与技术》2019年第5期37-44,57,共9页Membrane Science and Technology

基　　金：国家自然科学基金项目(21676200,21576208);长江学者和创新团队发展计划项目(IRT-17R80);天津市科技计划项目(18PTZWHZ00210)

摘　　要：分别以高比表面积(860 m^2/g)活性炭和煤粉为原料,辅以煤沥青、羧甲基纤维素(CMC)为粘结剂,聚乙烯醇缩丁醛(PVB)为造孔剂,采用压膜成形和焙烧工艺制备活性炭基炭膜(ACM)和煤基炭膜(CM),借助SEM、TG和电化学工作站等手段对炭膜结构与性能进行了表征.同时,采用溶胶凝胶法制备TiO2/ACM和TiO2/CM复合膜电极,探索其电催化水处理性能.结果表明,改变造孔剂含量可以有效调控炭膜孔径尺寸及分布,所制备微孔炭膜孔径范围0.16~0.82μm.与TiO2/煤基炭膜(TiO2/CM)复合膜电极相比,TiO2/ACM复合膜电极具有更高的比表面积(55.9 m^2/g)、更优的电化学活性和电催化效率.以TiO 2/ACM复合膜电极为阳极构建电催化膜反应器(ECMR)对苯酚废水(COD为2 450 mg/L)处理,当电流密度为1 mA/cm^2、停留时间为12 min时,COD去除率高达92.4%.Activated carbon with high specific surface area(860 m^2/g)and coal as raw material,coal pitch and carboxymethyl cellulose as binder,and polyvinyl butyral as pore forming agent were employed to fabricate ACM.The structure and properties of carbon membranes were characterized by FESEM,TG and electrochemical workstation etc.Simultaneously,a nano TiO2 loading of 2.41%was prepared by sol-gel method to explore its electrochemical properties.The results showed that pore size and distribution of the carbon membranes could be effectively controlled by changing the pore forming agent.The specific surface area and electrochemical performance of the composite membrane electrodes were characterized by nitrogen adsorption-desorption isotherm.The results indicated that the TiO2/ACM composite membrane electrodes displayed a larger specific surface area(55.9 m^2/g)and a higher electrochemical activity.Furthermore,the TiO2/ACM composite membrane electrodes were employed as the anode to constitute an electrocatalytic membrane reactor(ECMR)for phenolic wastewater(COD 2 450 mg/L)treatment.It was found that the COD removal rate of ECMR was up to 92.4%at current density of 1 mA/cm^2 and residence time of 12 min.

关 键 词：活性炭 微孔炭膜 TiO2/ACM复合膜电极 电催化膜反应器 苯酚废水处理 

分 类 号：TQ028.8[化学工程]