title: [Preparation of OMC-Au/L-Lysine/Au modified glassy carbon electrode and the study on its detection response to hydroquinone and catechol].
abstract: Ordered mesoporous carbon-Au nanoparticles (OMC-Au) nanocomposites were synthesized by a one-step chemical reduction route, and an OMC-Au/L-Lysine/Au composite film-modified glassy carbon electrode (GCE) was constructed. The microstructure of OMC and OMC-Au/L-Lysine/Au composite films were characterized by SEM, and the preparation process of OMC-Au/L-Lysine/Au modified glassy carbon electrode was investigated using cyclic voltammetry and electrochemical impedance spectroscopy. The electrocatalytic oxidation of hydroquinone and catechol on the modified electrode was discussed by differential pulse voltammetry in this study, and a sensor for separate determination of hydroquinone and catechol based on OMC-Au/L-Lysine/Au modified glassy carbon electrode was developed. Under the optimal conditions, the cathodic peak current was linearly related to hydroquinone concentration over ranges from 1.0 x 10(-6) mol x L(-1) to 8.0 x 10(-4) mol x L(-1) with a detection limit of 3.0 x 10(-7) mol x L(-1), and linearly related to catechol concentration from 1.0 x 10(-7) mol x L(-1) to 8.0 x 10(-5) mol x L(-1) with a detection limit of 8.0 x 10(-7) mol x L(-1).
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. iluenjor@163.com
authors.forename: Yao-Yu
authors.initials: YY
authors.lastname: Zhou
authors.forename: Lin
authors.initials: L
authors.lastname: Tang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Liu
authors.forename: Gui-De
authors.initials: GD
authors.lastname: Yang
authors.forename: Meng-Shi
authors.initials: MS
authors.lastname: Wu
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Lei
authors.forename: Guang-Ming
authors.initials: GM
authors.lastname: Zheng
mesh_terms: D002244:Carbon / Q000737:chemistry; D002396:Catechols / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D004867:Equipment Design; D005898:Glass / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006873:Hydroquinones / Q000032:analysis*; D008239:Lysine / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry; D016062:Porosity
chemical_list: D002396:Catechols; D006873:Hydroquinones; D002244:Carbon; D006046:Gold; D008239:Lysine; C034221:catechol; C031927:hydroquinone