title: Sensitive electrochemical detection of nitrobenzene based on macro-/meso-porous carbon materials modified glassy carbon electrode.
abstract: A sensitive electrochemical sensor for nitrobenzene (NB) detection has been developed based on macro-/meso-porous carbon materials (MMPCMs). MMPCMs were prepared by pyrolysis of the ionic-liquid ([AEIm]BF(4)) polymer (PIL) pre-wrapped onto SiO(2) microspheres and then removal of the silica core. The morphology and structure of MMPCMs were characterized by scanning electron microscopy (SEM) and nitrogen adsorption/desorption measurements. Owing to the macro-/meso-porous structure, large specific surface area and accumulation effect of MMPCMs, the MMPCMs modified glassy carbon (MMPCMs/GC) electrode has high catalytic activity towards the reduction of NB. At the optimal pH value and accumulation time, the resulted electrochemical sensor shows satisfactory analytical performance for NB detection. The linear response range is from 0.2μM to 40μM and the detection limit is 8nM based on the signal-to-noise ratio of 3. Moreover, the MMPCMs/GC electrode exhibits good stability and reproducibility, and acceptable selectivity.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
authors.forename: Jiayue
authors.initials: J
authors.lastname: Ma
authors.forename: Yunsong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zhang
authors.forename: Gangbing
authors.initials: G
authors.lastname: Zhu
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Jinhua
authors.initials: J
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D004785:Environmental Pollutants / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D008863:Microspheres; D009578:Nitrobenzenes / Q000032:analysis*; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry; D016062:Porosity; D015203:Reproducibility of Results; D059629:Signal-To-Noise Ratio; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D004785:Environmental Pollutants; D052578:Ionic Liquids; D009578:Nitrobenzenes; D011108:Polymers; D002244:Carbon; D012822:Silicon Dioxide; C036077:nitrobenzene