The effects of the electro-deposition conditions on the crystal structure and the properties of electrolytic manganese dioxide （EMD） were investigated in this paper. The results show that EMD was y-crystal, with san...The effects of the electro-deposition conditions on the crystal structure and the properties of electrolytic manganese dioxide （EMD） were investigated in this paper. The results show that EMD was y-crystal, with sand-like rough interface. The optimal preparation conditions of EMD were 30 min deposition time, and pH=1.0 in MnSO4-H2SO4 solution at 50 ℃. Surfactant （P1） was conducive to the uniform and stable surface ofy-MnO2 film, the impedance and the specific surface area of the electrode modified with y-MnO2 increased by 21.4 times and 75.6 times, respectively. The redox reversibility and the resolution ratio of characteristic peaks with the modified electrode were significantly improved in the benzodiazepines electrochemical reaction. The achievement illustrated that the controllable synthesis ofy-MnO2 film thickness was practical in electrochemical sensors, and the determination reliability of benzodiazepines was improved with y-MnO2 modified electrodes used in environment monitoring technology.展开更多
基金Funded by the Fundamental and Advanced Research Projects of Chongqing Science and Technology Commission(No.2013jj B20001)
文摘The effects of the electro-deposition conditions on the crystal structure and the properties of electrolytic manganese dioxide （EMD） were investigated in this paper. The results show that EMD was y-crystal, with sand-like rough interface. The optimal preparation conditions of EMD were 30 min deposition time, and pH=1.0 in MnSO4-H2SO4 solution at 50 ℃. Surfactant （P1） was conducive to the uniform and stable surface ofy-MnO2 film, the impedance and the specific surface area of the electrode modified with y-MnO2 increased by 21.4 times and 75.6 times, respectively. The redox reversibility and the resolution ratio of characteristic peaks with the modified electrode were significantly improved in the benzodiazepines electrochemical reaction. The achievement illustrated that the controllable synthesis ofy-MnO2 film thickness was practical in electrochemical sensors, and the determination reliability of benzodiazepines was improved with y-MnO2 modified electrodes used in environment monitoring technology.
