Huang Xiaomei, Deng Xiang, Qi Wenjing, Wu Di
Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou, Sichuan 635000, P. R. China.
Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing 401331, P. R. China.
J Nanosci Nanotechnol. 2018 Dec 1;18(12):8118-8123. doi: 10.1166/jnn.2018.16295.
Graphene cyclodextrin prepolymer (pre-CD)-multiwall carbon nanotubes (Gr-CDP-MWCNTs) nanocomposites modified on glassy carbon electrode (Gr-CDP-MWCNTs/GCE) are prepared and then platinum particles (PtNPs) are electrodeposited on it. The simultaneous determination of hydroquinone (HQ) and catechol (CC) at PtNPs/Gr-CDP-MWCNTs/GCE is reported in the present work. Synergistic effect of nanomaterials, host-guest chemical reaction ability of CDP, the stacking interaction between detected molecules and Gr-MWCNTs surface are considered as the main reasons of successfully simultaneous detection of HQ and CC. Cyclic voltammetry (CV), scanning electron microscopy (SEM) and different pulse voltammetry (DPV) are employed to characterize the proposed PtNPs/Gr-CDP-MWCNTs electrochemical biosensor. The prepared PtNPs/Gr-CDP-MWCNTs sensor shows linear response ranges of 0.05-27.2 μM and 0.1-27.2 μM and have low detection limits (S/N = 3) of 0.015 μM and 0.03 μM for simultaneous electrochemical determination of HQ and CC, respectively. It is also applied for the measurement of HQ and CC in local river water samples with recoveries from 98.0 to 102.0% and from 99.3 to 101.5%.
制备了修饰在玻碳电极上的石墨烯环糊精预聚物（pre-CD）-多壁碳纳米管（Gr-CDP-MWCNTs）纳米复合材料（Gr-CDP-MWCNTs/GCE），然后在其上电沉积铂颗粒（PtNPs）。本文报道了在PtNPs/Gr-CDP-MWCNTs/GCE上同时测定对苯二酚（HQ）和邻苯二酚（CC）。纳米材料的协同效应、CDP的主客体化学反应能力、检测分子与Gr-MWCNTs表面之间的堆积相互作用被认为是成功同时检测HQ和CC的主要原因。采用循环伏安法（CV）、扫描电子显微镜（SEM）和差分脉冲伏安法（DPV）对所制备的PtNPs/Gr-CDP-MWCNTs电化学生物传感器进行表征。所制备的PtNPs/Gr-CDP-MWCNTs传感器对HQ和CC同时电化学测定的线性响应范围分别为0.05 - 27.2 μM和0.1 - 27.2 μM，检测限（S/N = 3）分别低至0.015 μM和0.03 μM。它还用于测定当地河水样品中的HQ和CC，回收率分别为98.0%至102.0%和99.3%至101.5%。
