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通过一定体积比的CdS和普鲁士蓝(PB)胶体纳米溶液的简单混合,制备了PB/CdS纳米复合物。在共反应剂存在条件下,PB纳米粒子含量较低时,在ITO电极上CdS纳晶的电致化学发光(ECL)强度可以增强3倍左右。PB纳米粒子含量较高时,CdS纳晶的ECL强度则显著降低。详细讨论了PB纳米粒子对CdS纳晶ECL影响的机理。PB纳米粒子对CdS纳晶的ECL增强可用于H2O2传感。该传感器对H2O2响应的线性范围为3.3×10-8～6.5×10-3 mol.L-1(R=0.999 2),检测限为12 nmol.L-1(S/N=3),传感器具有良好的稳定性和重现性。
PB / CdS nanocomposites were prepared by simple mixing of CdS and Prussian blue (PB) colloidal nanometer solution in a certain volume ratio. In the presence of co-reactants, the ECL intensity of CdS nanocrystals on the ITO electrode can be increased by about 3 times when the PB nanoparticle content is low. When the content of PB nanoparticles is high, the ECL intensity of CdS nanocrystals decreases significantly. The mechanism of the influence of PB nanoparticles on ECS of CdS nanocrystals is discussed in detail. The ECL enhancement of PB nanoparticles on CdS nanocrystals can be used for H2O2 sensing. The linear response of the sensor to H2O2 ranged from 3.3 × 10-8 to 6.5 × 10-3 mol·L-1 (R = 0.999 2) with a detection limit of 12 nmol.L-1 (S / N = 3) Has good stability and reproducibility.