Determination of m-dinitrobenzene based on novel type of sensor using thiol-porphyrin mixed monolayer-tethered polyaniline with intercalating fullerenols.
A novel sensor based on thiol-porphyrin mixed monolayer-tethered polyaniline (PANI) with intercalating fullerenols was applied to sensitively detect m-dinitrobenzene (m-DNB) by differential pulse voltammetry (DPV). The thiolated polyaniline was examined by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrode modification of thiol-porphyrin mixed monolayer-tethered polyaniline with intercalating fullerenols exhibited a higher analytical sensitivity versus that of thiol-porphyrin mixed monolayer-tethered polyaniline, because the fullerenols in mixed monolayer could improve the preconcentration efficiencies of m-DNB. Under optimum conditions, the linear calibration curves ranged from 0.029 to 10,000 nmol L(-1) for m-DNB, with a limit of detection (S/N=3) of 9.72 pmol L(-1).
Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. Electronic address: luxq@nwnu.edu.cn.
Xiaoquan
X
Lu
Duoliang
D
Shan
Jianmin
J
Yang
Baomei
B
Huang
Xibin
X
Zhou
D000814:Aniline Compounds / Q000737:chemistry*; D002138:Calibration; D004136:Dinitrobenzenes / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D057230:Limit of Detection; D011166:Porphyrins / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry*
D000814:Aniline Compounds; D004136:Dinitrobenzenes; D037741:Fullerenes; D011166:Porphyrins; D013438:Sulfhydryl Compounds; C416807:polyaniline; C017906:3-dinitrobenzene
Fullerenols; M-dinitrobenzene; Polyaniline; Porphyrin