A selective and sensitive sensor based on highly dispersed cobalt porphyrin-Co3O4-graphene oxide nanocomposites for the detection of methyl parathion

作者：Liu, Fang-mei; Du, Yan-qiu; Cheng, Yan-mei; Yin, Wei^*; Hou, Chang-jun; Huo, Dan-qun; Chen, Can; Fa, Huan-bao^*

来源：Journal of Solid State Electrochemistry, 2016, 20(3): 599-607.

DOI：10.1007/s10008-015-3079-1

• Methyl parathion
• Porphyrin
• Graphene
• Electrochemical sensor
• Co3O4 nanoparticles

A new type of graphene-Co3O4 functionalized porphyrin was synthesized and used for selective and sensitive detection of methyl parathion (MP). Co3O4 nanoparticles were firstly modified onto graphene oxide sheets and the porphyrin/Co3O4/graphene nanocomposites were then synthesized by self-assembly decoration of anion porphyrin on Co3O4-modified graphene sheets by pi-pi stacking. By dexterously controlling the electrochemical reduction variables and optimizing the electrode preparation parameters, with the satisfactory conductivity, strong adsorption toward MP, the developed novel sensor fabricated with the as-synthesized nano-assembly for determination of MP shows some satisfactory properties such as a wide linear concentration range (from 4.0 x 10(-7) M to 2.0 x 10(-5) M), low detection limit (1.1 x 10(-8) M), favorable repeatability, long-time storage stability, and satisfactory anti-interference ability. It also had high precision for the real sample analysis, which indicated the good perspective for field application.

• 出版日期2016-3
• 单位重庆大学