A simple and green method was introduced to fabricate the electrochemical sensor based on the electrochemically reduced graphene oxide（ERGO） modified electrode. It was found that the ERGO modified electrode exhibite...A simple and green method was introduced to fabricate the electrochemical sensor based on the electrochemically reduced graphene oxide（ERGO） modified electrode. It was found that the ERGO modified electrode exhibited an excellent catalytic activity toward the oxidation of dihydroxybenzenes isomers. Under the optimum conditions, in the simultaneous determination of the dihydroxybenzene isomers, the currents were linear with the concentrations of the isomers from 5 to 550 μmol/L for hydroquinone（HQ）, from 6 to 400 μmol/L for catechol（CT） and from 5 to 350 μmol/L for resorcinol（RS）, respectively. In addition, the proposed sensor has good stability and reproducibility. The developed method has been applied to the simultaneous determination of dihydroxybenzene isomers in real samples with a satisfactory recovery from 98% to 103%.展开更多
A novel graphene oxide doped poly（hydroxymethylated-3,4-ethylenedioxythiophene） （PEDOT-MeOH/GO） composite film was synthesized and utilized as an efficient electrode material for simultaneous detection ofrutin and...A novel graphene oxide doped poly（hydroxymethylated-3,4-ethylenedioxythiophene） （PEDOT-MeOH/GO） composite film was synthesized and utilized as an efficient electrode material for simultaneous detection ofrutin and ascorbic acid （AA）. PEDOT-MeOH/GO films were synthesized on glassy carbon electrode （GCE） by a facile one-step electrochemical approach and were characterized by scanning electron microscopy, UV-Vis spectroscopy, FTIR spectra and electrochemical methods. Then the PEDOT-MeOH/GO/GCE was applied successfully in the simultaneous detection of rutin and AA. The results showed that the oxidation peak currents of rutin and AA obtained at the PEDOT-MeOH/GO/GCE were much higher than those at the traditional conducting polymer PEDOT/GO/GCE, PEDOT-MeOH/GCE, PEDOT/GCE and bare GCE. Under optimized conditions, the linear ranges for rutin and AA are 20 nmol/L-10 p.mol/L and 8 μmol/L-1 mmol/L, respectively. The detection limit is 6 nmol/L for rutin and 2 μmol/L for AA （S/N = 3）, which are lower than those of the reported electrochemical sensors.展开更多
基于氧化石墨烯修饰电极,通过简单的恒电位还原方式制备电还原氧化石墨烯修饰电极(r GO/GCE),采用循环伏安法(CV)和微分脉冲伏安法(DPV)研究了对苯二酚(HQ)、邻苯二酚(CT)、间苯二酚(RS)3种苯二酚异构体混合物在该电极上的电化学响应,...基于氧化石墨烯修饰电极,通过简单的恒电位还原方式制备电还原氧化石墨烯修饰电极(r GO/GCE),采用循环伏安法(CV)和微分脉冲伏安法(DPV)研究了对苯二酚(HQ)、邻苯二酚(CT)、间苯二酚(RS)3种苯二酚异构体混合物在该电极上的电化学响应,并将检测条件逐步优化。结果表明,r GO/GCE可用于同时检测苯二酚的3种同分异构体,HQ、CT在r GO/GCE上的电位差为141.29 m V,CT、RS间的电位差为323.81 m V,线性范围分别为5.00×10^(-5)~2.00×10^(-3)、5.00×10^(-5)~2.00×10^(-3)、7.00×10^(-5)~3.00×10^(-3)mol/L,检出限分别达到3.57×10^(-7)、3.62×10^(-7)、3.55×10^(-6)mol/L。并将所制备电极应用于模拟水样,获得满意结果。展开更多
基金Funded by the National Natural Science Foundation of China(No.51273155)the Fundamental Research Funds for the Central Universities(No.2014-Ia-030)
文摘A simple and green method was introduced to fabricate the electrochemical sensor based on the electrochemically reduced graphene oxide（ERGO） modified electrode. It was found that the ERGO modified electrode exhibited an excellent catalytic activity toward the oxidation of dihydroxybenzenes isomers. Under the optimum conditions, in the simultaneous determination of the dihydroxybenzene isomers, the currents were linear with the concentrations of the isomers from 5 to 550 μmol/L for hydroquinone（HQ）, from 6 to 400 μmol/L for catechol（CT） and from 5 to 350 μmol/L for resorcinol（RS）, respectively. In addition, the proposed sensor has good stability and reproducibility. The developed method has been applied to the simultaneous determination of dihydroxybenzene isomers in real samples with a satisfactory recovery from 98% to 103%.
基金financially supported by the National Natural Science Foundation of China(Nos.50963002,51073074,51272906,51263010 and 51302117)Natural Science Foundation of Jiangxi Province(Nos.2010GZH0041,20122BAB213007)+1 种基金Jiangxi Provincial Department of Education(Nos.GJJ11590,GJJ10678 and GJJ13258)Jiangxi Science&Technology Normal University Innovation Fund of Postgraduates(YC2013-X25)
文摘A novel graphene oxide doped poly（hydroxymethylated-3,4-ethylenedioxythiophene） （PEDOT-MeOH/GO） composite film was synthesized and utilized as an efficient electrode material for simultaneous detection ofrutin and ascorbic acid （AA）. PEDOT-MeOH/GO films were synthesized on glassy carbon electrode （GCE） by a facile one-step electrochemical approach and were characterized by scanning electron microscopy, UV-Vis spectroscopy, FTIR spectra and electrochemical methods. Then the PEDOT-MeOH/GO/GCE was applied successfully in the simultaneous detection of rutin and AA. The results showed that the oxidation peak currents of rutin and AA obtained at the PEDOT-MeOH/GO/GCE were much higher than those at the traditional conducting polymer PEDOT/GO/GCE, PEDOT-MeOH/GCE, PEDOT/GCE and bare GCE. Under optimized conditions, the linear ranges for rutin and AA are 20 nmol/L-10 p.mol/L and 8 μmol/L-1 mmol/L, respectively. The detection limit is 6 nmol/L for rutin and 2 μmol/L for AA （S/N = 3）, which are lower than those of the reported electrochemical sensors.
文摘基于氧化石墨烯修饰电极,通过简单的恒电位还原方式制备电还原氧化石墨烯修饰电极(r GO/GCE),采用循环伏安法(CV)和微分脉冲伏安法(DPV)研究了对苯二酚(HQ)、邻苯二酚(CT)、间苯二酚(RS)3种苯二酚异构体混合物在该电极上的电化学响应,并将检测条件逐步优化。结果表明,r GO/GCE可用于同时检测苯二酚的3种同分异构体,HQ、CT在r GO/GCE上的电位差为141.29 m V,CT、RS间的电位差为323.81 m V,线性范围分别为5.00×10^(-5)~2.00×10^(-3)、5.00×10^(-5)~2.00×10^(-3)、7.00×10^(-5)~3.00×10^(-3)mol/L,检出限分别达到3.57×10^(-7)、3.62×10^(-7)、3.55×10^(-6)mol/L。并将所制备电极应用于模拟水样,获得满意结果。
