摘要
以活性炭为原料,吡咯为改性剂FeCl3为氧化剂,原位化学氧化法改性电吸附电极。以比电容为指标,采用单因素法分析,确定最优改性工艺,并对该工艺条件下制备的样品进行比表面积、表面形貌和电化学性能的表征。结果表明,在活性炭质量为2.0g,吡咯浓度为2mol·L^-1及FeCl3浓度为2mol·L^-1时,改性的活性炭比电容值高达270.36F·g^-1;改性后活性炭的比表面积、孔径和孔容分别降低了10.47%、51.18%和45.71%,孔隙结构以微孔为主;且改性后电极的平均接触角从85.7°减小到60.45°,比电容由89.66 F·g^-1增加到283.5F·g^-1,提高了68.37%;将最佳配比改性的电极应用于除盐小试中除盐率可达45.36%。本实验的研究为电吸附电极除盐性能及导电聚合物的深入研究提供理论基础。
Activated carbon was used as raw material,pyrrole was used as modifier and ferric chloride was used as oxidant to modify the electroadsorption electrode by in-situ chemical oxidation.Taking specific capacitance as index,the optimum modification process was determined by single factor analysis,and the specific surface area,surface morphology and electrochemical properties of the samples prepared under the process conditions were characterized.The results showed that when the mass of activated carbon is 2.0g,the concentration of pyrrole is 2mol·L^-1 and the concentration of ferric chloride is 2mol·L^-1,the specific capacitance of modified activated carbon is as high as 270.36F·g^-1.The specific surface area,pore size and pore volume of the modified activated carbon were reduced by 10.47%,51.18%and 45.71%respectively,and the pore structure was dominated by micropore.The average contact angle of the modified electrode is reduced from 85.7°to 60.45°,the specific capacitance is increased from 89.66F·g^-1 to 283.5F·g^-1,increased by 68.37%;The desalination rate can reach 45.36%when the optimum proportion of modified electrodes is applied in the desalination pilot test.The research of this experiment provides a theoretical basis for the in-depth study of the desalination performance of electroadsorption electrodes and conductive polymers.
作者
韩豆豆
李海红
王娟
杨可
HAN Dou-dou;LI Hai-hong;WANG Juan;YANG Ke(College of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,China)
出处
《化学工程师》
CAS
2019年第12期5-11,共7页
Chemical Engineer
基金
西安工程大学研究生创新基金(chx2019050)
陕西省科技厅工业攻关项目(2017GY-151)
关键词
吡咯
电吸附
电极
比电容
pyrrole
electrosorption
electrode
specific capacitance
