A Nanocomposite of Copper(Ii) Functionalized Graphene and Application for Sensing Sulfurated Organophosphorus Pesticides
New journal of chemistry(2013)
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.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要