摘要
以SnCl_45H_2O和NH_3H_2O为原料,采取水热法合成了SnO_2纳米材料,并制备了纳米材料修饰电极。实验结果表明,SnO_2纳米材料修饰电极对多巴胺电化学氧化过程具有良好的电催化性能。探讨pH值、修饰量、扫速等因素对多巴胺电化学行为的影响,得出了最佳的实验条件,并利用差分脉冲伏安法实现了对多巴胺的检测。结果表明,在1.0×10~(-5)~9.0×10~(-5)mol/L范围内,氧化峰电流与多巴胺浓度呈线性变化关系,相关系数可达0.991 4。
SnO_2 nanomaterials were synthesized with hydrothermal method by using SnCl_4 5H_2O and NH_3H_2O as raw materials, and nanomaterial modified electrodes were prepared. The experimental results show that the SnO_2 nanomaterial modified electrode has good electrocatalytic performance for dopamine electrochemical oxidation process. The effect of pH values, modification amount, sweep rate and other factors on the electrochemical behavior of dopamine were studied,the optimal experimental conditions were obtained and the detection of dopamine was achieved by differential pulse voltammetry. The results showed that the oxidation peak current and the dopamine concentration varied linearly in the concentration range of 1.0×10~(-5)-9.0×10~(-5) mol/L, and the correlation coefficient can reach 0.991 4.
引文
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