【摘要】 采用连续循环伏安法在金电极上制备了纳米金聚邻苯二胺膜修饰电极(nano-Au/POPD/Au),并研究了不同修饰电极在碱溶液中对甲醛的电催化氧化性能。结果发现,nano-Au/POPD/Au电极对甲醛具有高的催化活性和稳定性,在峰电位0.3 V处产生的电催化电流比nano-Au/Au电极上产生的高2.1倍。考察了纳米金的负载量(扫描圈数和扫描速率)、扫描速率、NaOH浓度等参数对甲醛催化氧化的影响。在优化条件下,甲醛在质量浓度0.1~600 mg/L范围内呈良好线性,检出限(S/N=3)为0.01 mg/L。将该方法应用于红酒和Skiphop儿童塑料餐碟中甲醛含量的测定,结果与标准乙酰丙酮法一致。更多还原

【Abstract】 A gold nanoparticles /poly o-phenylenediamine modified glod electrode( nano-Au /POPD / Au) was prepared by consecutive cyclic voltammetry( CV) and the performances of different modified electrodes were studied in alkaline solution. The results showed that the nano-Au / POPD / Au electrode was highly active and stable for electrooxidation of formaldehyde,and its electrocatalytic current at the potential of 0. 3 V was 2. 1 times higher than that of nano-Au / Au electrode. Effects of various parameters such as nano-Au loding( sweep cycle and scan rate),scan rate,NaOH concentration on the electrocatalytic oxidation of formaldehyde were also investigated. Under the optimum conditions, the calibration curve of formaldehyde was linear in the concentration range of 0. 1- 600 mg / L. The detection limit( S / N = 3) was 0. 01 mg / L. The method was applied in the determination of formaldehyde in red wine and skiphop children plastic dish,and the results were in agreements with those obtained by the standard acetylacetone method.更多还原