二茂铁巯基化合物/金纳米粒子/还原石墨烯修饰电化学传感器检测Cu~(2+)
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摘要
通过Hummer法进一步还原合成还原石墨烯(RGO),Shifft碱反应合成新型二茂铁巯基化合物(FcSH)。利用还原石墨烯吸附性将石墨烯修饰在玻碳电极(GCE)上,在石墨烯表面电沉积金纳米粒子(AuNPs),通过自组装制备还原石墨烯和二茂铁巯基修饰电化学传感器(FcSH/AuNPs/RGO/GCE),该电化学传感器具有大的比表面积和富电子性能。实验显示,在0.01 mol/L HCl中,富集时间为180s,Cu~(2+)浓度在1.0×10~(-12)~1.0×10~(-11)mol/L与1.0×10~(-11)~1.0×10~(-10)mol/L范围内与方波伏安峰电流分别呈现良好的线性关系,检出限为0.94×10~(-12)mol/L。该电化学传感器对Cu~(2+)的检测表现出较好的选择性、高的稳定性和灵敏性,可用于环境中痕量Cu~(2+)的测定。
In this study,Hummer method was used to synthesize reduced graphene(RGO),and fcrrocenylthiols(FcSH)was preparaed by the schiff base reaction.Then FcSH was self-assembled on Au nanoparticles(AuNPs)and reduced grapheme modified glassy carbon electrode to form the organicinorganic hybrid electrochemical sensor(FcSH/AuNPs/RGO/GCE).As a result,FcSH/AuNPs/RGO/GCE sensor possessed an excellent sensitivity and selectivity for the detection of Cu~(2+)and could be used for electrochemical detection of ultra-trace Cu~(2+)in environment.The reponse of voltammtey was linear to Cu~(2+)concentration ranging from 1.0×10~(-12)to 1.0×10~(-11)mol/L and 1.0×10~(-11)-1.0×10~(-10)mol/L,with detection limit of 0.94×10~(-12)mol/L in 0.01 mol/L HCl under a preconcentration of 180 s.
In this study,Hummer method was used to synthesize reduced graphene(RGO),and fcrrocenylthiols(FcSH)was preparaed by the schiff base reaction.Then FcSH was self-assembled on Au nanoparticles(AuNPs)and reduced grapheme modified glassy carbon electrode to form the organicinorganic hybrid electrochemical sensor(FcSH/AuNPs/RGO/GCE).As a result,FcSH/AuNPs/RGO/GCE sensor possessed an excellent sensitivity and selectivity for the detection of Cu~(2+)and could be used for electrochemical detection of ultra-trace Cu~(2+)in environment.The reponse of voltammtey was linear to Cu~(2+)concentration ranging from 1.0×10~(-12)to 1.0×10~(-11)mol/L and 1.0×10~(-11)-1.0×10~(-10)mol/L,with detection limit of 0.94×10~(-12)mol/L in 0.01 mol/L HCl under a preconcentration of 180 s.
引文
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[3]YI W G,ZHANG R,GU Z.Acta Chimica Sinica(易卫国,张荣,顾峥.化学学报),2011,69(8):1024.
[4]WANG A X,GUO L P,ZHANG H.Chinese Journal of Analytical Chemistry(王爱霞,郭黎平,张宏.分析化学),2005,3(4):385.
[5]KAN X W,DENG X H,ZHANG W Z,Journal of Analytical Science(阚显文,邓湘辉,张文芝.分析科学学报),2006,22(4):478.
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[9]Xie C G,Li H F,Li S Q,et al.Analytical Chemistry,2010,82:241.
[10]Jin J C,Wu J,Yang G P,et al.Chemical Communications,2016,52:8475.
[11]Jin J C,Guo R L,Zhang W Y,et al.Solid State Chemistry,2016,243:253.
[12]YANG M,JIN B K.Journal of Analytical Science(杨梅,金葆康.分析科学学报),2008,24(4):373.
[13]MA W S,ZHOU J W.Chemical Journal of Chinese Univertsities(马文石,周俊文.高等学校化学学报),2010,31(10):1982.
[14]YANG M,WU J,XIE C G.Journal of Analytical Science(杨梅,吴菊,谢成根.分析科学学报),2014,30(3):437.
[15]Jin J C,Jiang C,Chang W G,et al.Inorganic Chemistry Communications,2016,70:157.
[16]PANG S N,WU T L,LIANG Y.Journal of Instrumental Analysis(庞术南,吴天良,梁毅.分析测试学报),2014,33(12):1404.