Electropolymerization of Brilliant Cresyl Blue on Carbon Ionic Liquid Electrode and Electrocatalytic Application for the Voltammetric Determination of Ascorbic Acid

نویسندگان

  • Xia Li
  • Qingjuan Niu
  • Guangjiu Li
  • Tianrong Zhan
  • Wei Sun
چکیده

Azul de cresil brilhante (BCB) foi eletropolimerizado sobre a superfície de um eletrodo de carbono líquido iônico (CILE) por voltametria cíclica de varredura na faixa de potencial de –0,5 a 1,0 V. CILE foi preparado usando o 1-etil-3-metil-imidazólio tetrafluoroborato ([EMIM]BF4) como modificador. Um filme polimerico estável de BCB foi obtido no CILE com aparecimento de um par de picos redox. As características do filme PBCB foram estudadas por diversos métodos tais como, microscopia eletrônica de varredura (SEM), espectroscopia de impedância eletroquímica (EIS) e voltametria cíclica. O eletrodo modificado apresentou excelente resposta eletrocatalítica para ácido ascórbico com o aumento das respostas eletroquímicas. Sob condições ótimas, uma boa resposta voltamétrica linear foi obtida no intervalo 2,0 × 10-3,0 × 10 mol L , com limite de detecção de 6,5 μmol L (3s).

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تاریخ انتشار 2011