Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electroch...Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electrochemical behaviors of emtol and P-benzenediol were studied on the SAMs in Britton-Robinson buffer solution.The results of the experiments indicate that metol and p-benzenediol can be catalyzed on the SAMs.They can not only be determined singleness but also be determined in mixture simultaneously and doesn’t interfere with each other in a large range of concentration.This method has been used to determine metol and P-benzenediol in waste photographic imaging agent with satisfactory results.展开更多
A novel modified electrode was prepared by electrochemicaly cycling scanning the glass carbon electrode covered with a macroporous alumina membrane in a solution containing PPy and PMo 12O 3- 40. The reversibility of ...A novel modified electrode was prepared by electrochemicaly cycling scanning the glass carbon electrode covered with a macroporous alumina membrane in a solution containing PPy and PMo 12O 3- 40. The reversibility of the cyclic voltammograms was improved obviously. The remarkable advantage of the modified electrode was the high sensitivity and favorable electrocatalytic behavior toward NO - 2. The peak current increased linearly with the concentration of NO - 2 in the range of 8.0×10 -7—0.01 mol/L. The detection limit of NO - 2 was 1.0×10 -9 mol/L. The polyoxometalates nanopaticles modified electrode exhibited almost the same electrochemical behavior after 7 d. It is indicated that the PMo 12-PPy/AGCE has a good reproducibility, stability and wide linearity range.展开更多
以石墨烯-壳聚糖复合膜修饰玻碳电极,并在此复合膜上电沉积纳米铜,用于葡萄糖的无酶检测。以扫描电镜、傅立叶红外光谱及电化学交流阻抗谱对该复合膜微观形态进行表征,以循环伏安法、计时电流法对该电极的电化学行为进行研究。实验结果...以石墨烯-壳聚糖复合膜修饰玻碳电极,并在此复合膜上电沉积纳米铜,用于葡萄糖的无酶检测。以扫描电镜、傅立叶红外光谱及电化学交流阻抗谱对该复合膜微观形态进行表征,以循环伏安法、计时电流法对该电极的电化学行为进行研究。实验结果表明,在0.1 mol/L Na OH溶液中修饰电极对葡萄糖具有良好的催化氧化作用,该电极对葡萄糖的检测线性范围为5.6×10-5~1.2×10-3mol/L,检出限(S/N=3)为2.3×10-5mol/L。该修饰电极对样品的检测具有良好的稳定性、重现性。展开更多
文摘Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electrochemical behaviors of emtol and P-benzenediol were studied on the SAMs in Britton-Robinson buffer solution.The results of the experiments indicate that metol and p-benzenediol can be catalyzed on the SAMs.They can not only be determined singleness but also be determined in mixture simultaneously and doesn’t interfere with each other in a large range of concentration.This method has been used to determine metol and P-benzenediol in waste photographic imaging agent with satisfactory results.
文摘A novel modified electrode was prepared by electrochemicaly cycling scanning the glass carbon electrode covered with a macroporous alumina membrane in a solution containing PPy and PMo 12O 3- 40. The reversibility of the cyclic voltammograms was improved obviously. The remarkable advantage of the modified electrode was the high sensitivity and favorable electrocatalytic behavior toward NO - 2. The peak current increased linearly with the concentration of NO - 2 in the range of 8.0×10 -7—0.01 mol/L. The detection limit of NO - 2 was 1.0×10 -9 mol/L. The polyoxometalates nanopaticles modified electrode exhibited almost the same electrochemical behavior after 7 d. It is indicated that the PMo 12-PPy/AGCE has a good reproducibility, stability and wide linearity range.
文摘以石墨烯-壳聚糖复合膜修饰玻碳电极,并在此复合膜上电沉积纳米铜,用于葡萄糖的无酶检测。以扫描电镜、傅立叶红外光谱及电化学交流阻抗谱对该复合膜微观形态进行表征,以循环伏安法、计时电流法对该电极的电化学行为进行研究。实验结果表明,在0.1 mol/L Na OH溶液中修饰电极对葡萄糖具有良好的催化氧化作用,该电极对葡萄糖的检测线性范围为5.6×10-5~1.2×10-3mol/L,检出限(S/N=3)为2.3×10-5mol/L。该修饰电极对样品的检测具有良好的稳定性、重现性。
