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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。
The polypyrrole / carbon nanotubes (DBS-PPy / CNTs) composite cathode materials were prepared by chemical oxidation using sodium dodecyl benzene sulfonate (SDBS) as dopant. For different concentrations of SDBS, the surface morphology, electrochemical properties and capacitive adsorption desalination units with DBS-PPy / CNTs as cathode and CNTs as anode were investigated. The results showed that DBS-PPy / CNTs nanocomposites prepared at the concentration of 1.0 mmol / L SDBS had the best performance, the specific capacitance of the electrode was 97.85 F / g, which was about 4.3 times that of CNTs electrode. The compositional capacitance method Desalination unit (CDI), the electrode adsorption of Na + ratio of 21.55 mg / g, CNTs is 3 times the cathode. The introduction of doping ions during the pyrrole polymerization process is an important technical means to achieve the conductivity and ion adsorption selectivity of such materials.