摘要
将合成的量子点CdTe与氧化石墨烯(GO)的复合物修饰到金电极的表面,得到了GO-CdTe电化学发光传感器,用以测定水中对硝基酚的含量.结果表明,在含有鲁米诺的强碱性溶液中,该传感器会产生明显的电化学发光信号,加入一定量的对硝基酚,该体系的发光信号发生明显猝灭.在优化的实验条件下,对硝基酚浓度在1.9×10~(-7 )~3.8×10~(-5 )mol/L范围内与相对电化学发光强度呈现良好的线性关系,检测限为6.3×10~(-8)mol/L.对实际水样中对硝基酚含量进行测定的回收率在97.2%~101.8%范围内.
GO-CdTe electrochemical luminescence sensor was prepared by casting the CdTe quantum dot and graphene oxide(GO) complex on the gold electrode surface, determination of p-nitrophenol in Itunhe water sample. The results showed that this sensor can produce obviously electrochemical luminescence signal in alkaline media containing luminol. And when a certain amount of p-nitrophenol is added, the luminous signal of the system is obviously quenched. Under optimized conditions, the ECL signal intensity depends linearly on the concentration of p-nitrophenol in the range of 1.9×10~(-7) and 3.8×10~(-5)mol/L. The detection limit is 6.3×10~(-8)mol/L. The method was applied to the determination of p-nitrophenol in real samples, with satisfactory results. The recovery rates were determined to be between 97.2% and 101.8%.
引文
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