文献类型：期刊文献

英文题名：A nanocomposite of copper(II) functionalized graphene and application for sensing sulfurated organophosphorus pesticides

作者：Li, Zhi[1];Zhang, Heji[1];Ge, Xueping[1];Liang, Ying[1];An, Xingcai[3];Yang, Cunzhong[1];Fang, Bin[1];Xie, Haifen[1];Wei, Jianjun[1,2]

机构：[1]E China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China;[2]JSNN, Dept Nanosci, Greensboro, NC 27401 USA;[3]Gansu Nat Energy Res Inst, Lanzhou 730000, Gansu, Peoples R China

年份：2013

卷号：37

期号：12

起止页码：3956

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000326984000021)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 51103039). J. Wei thanks support from the JSNN.

语种：英文

摘要：Reduced graphene oxide is modified with sulfanilic acid diazonium salt followed by copper(II) chelating to form a Cu complex nanocomposite. Characterization by Raman spectroscopy, FTIR and EDS, XPS, cyclic voltammetry demonstrates the successful functionalization of the graphene surfaces. Electrodes that are prepared by drop-casting the suspended nanocomposite solution on interdigitated electrodes (IDE) are tested for a novel pulsed amperometric detection of a series of sulfurated organophosphorus (SOP) pesticides, parathion, fenitrothion and malathion. A linear relationship of the pulsed amperometric current to the logarithmic value of concentration of the three SOPs is demonstrated with a R-2 value of similar to 0.95 at the S-OP concentration range of 1 ppb to 10(4) ppb. Negligible amperometric currents are observed in the control experiments using diethyl ethylphosphonate (DEEP) and dimethyl methyl phosphonate (DMMP), or S-2(-), SO32-, SO42- ions, suggesting sensing specificity to sulfurated compounds.