对氨基苯酚在石墨烯-离子液体复合物修饰电极上的电化学行为研究  

Electrochemical Behaviors of p-Aminophenol at Graphene-Ionic Liquid Composite Modified Electrode

作　　者：刘志敏[1] 王珍玲[1] 李志华[1] 

机构地区：[1]河南工业大学化学化工学院,河南郑州450001

出　　处：《分析测试学报》2011年第11期1267-1271,共5页Journal of Instrumental Analysis

基　　金：河南省教育厅高校青年骨干教师基金资助项目(001135);河南工业大学2010年研究生科技创新基金资助项目(10YJS034)

摘　　要：使用石墨烯(Graphene,GR)和离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIM]PF6)作修饰剂,通过壳聚糖(CHIT)成膜,制备了石墨烯-离子液体复合物修饰电极([BMIM]PF6-GR-CHIT/GCE)。在0.1mol/L磷酸盐缓冲液中,采用循环伏安和微分脉冲伏安法研究了对氨基苯酚在[BMIM]PF6-GR-CHIT/GCE上的电化学行为,建立了测定水样中对氨基苯酚的新方法。对氨基苯酚在[BMIM]PF6-GR-CHIT/GCE上的循环伏安图上出现一对灵敏、可逆的氧化还原峰,峰电位差为0.045 V,其氧化峰电流是在GR-CHIT/GCE上的2.2倍。对氨基苯酚在[BMIM]PF6-GR-CHIT/GCE上的微分脉冲伏安扫描峰电流与其浓度在5.0×10-6～5.0×10-4 mol/L范围内呈良好线性,检出限(S/N=3)为3.0×10-7 mol/L。应用此修饰电极测定水样中的对氨基苯酚,结果满意。A new [ BMIM ] PF6 - GR - CHIT/GCE modified electrode was fabricated via the film formed by chitosan（CHIT）, and using graphene（GR） and ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate（ [BMIM]PF6 ） as modifiers. In 0. 1 mol/L PBS solution, the electrochemical behavior ofp-aminophenol（PAP） at [ BMIM] PF6 -GR -CHIT/GCE was investigated by cyclic volta- mmetry and differential pulse voltammetric method. The cyclic vohammetric curve of PAP at the [ BMIM] PF6 -GR- CHIT/GCE electrode presented a pair of sensitive and reversible redox peaks. The peak current response at the proposed electrode was enhanced 2. 2 folds as high as that at the GR - CHIT/GCE, and the peak potential difference was 0. 045 V. The differential pulse voltammetric peak current of PAP at [ BMIM ] PF6 - GR - CHIT/GCE showed a good linear relationship in the concentration range of 5.0 ×10^-6 - 5.0×10^ -4 mol/L, with a detection limit（S/N = 3 ） of 3.0 ×10^-7 moL/L. The method was used in the determination of p-aminophenol in water sample with satisfactory result.

关 键 词：石墨烯 [BMIM]PF6 对氨基苯酚 循环伏安法 微分脉冲伏安法 

分 类 号：O657.1[理学—分析化学] O625.312[理学—化学]