摘要
以十二烷基苯磺酸钠(SDBS)为掺杂剂,采用化学氧化法制备了聚吡咯/碳纳米管(DBS-PPy/CNTs)复合阴极材料。针对不同浓度的SDBS,考察了材料的表面形貌、电化学性能及以DBS-PPy/CNTs电极为阴极、CNTs电极为阳极构成的电容法脱盐单元的吸附性能。结果表明,在SDBS浓度为1.0 mmol/L时,所制备的DBS-PPy/CNTs复合纳米材料综合性能最佳,电极的比电容为97.85 F/g,约为CNTs电极的4.3倍;组成电容法脱盐单元(CDI)时,电极对Na+的比吸附量为21.55 mg/g,是CNTs为阴极时的3倍。在吡咯聚合过程中引入掺杂离子是实现该类材料导电性和离子吸附选择性的重要技术手段。
In this paper, PPy/CNTs composite as cathode material was synthesized using SDBS as dopant via chemical oxidation polymerization method.The effects of SDBS concentration on the morphology and electrochemical performance of PPy/CNTs composite were investigated and analyzed. The adsorbing performance of the CDI cell comprised by DBS-PPy/CNTs as cathode and CNTs as anode was also assessed. The results show that the DBS- PPy/CNTs composite exhibits excellent performance at SDBS concentration of 1.0 mmol/L, whose specific capacitance is as high as 97.85 F/g and is about 4.3 times of the CNTs electrode. In addition, the electrode＇s specific adsorbing capacity of Na^＋ could reach to 21.55 mg/g which is approximately 3 times of CNTs electrode.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第9期24-27,共4页
Technology of Water Treatment
基金
国家自然科学基金面上项目(21276178)
关键词
聚吡咯
碳纳米管
电极
电容法脱盐
polypyrrole
carbon nanotubes （CNTs）
electrode
capacitive deionization
