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采用白磷还原法制备了磷修饰的金纳米粒子(Au-PNPs),Au-PNPs的粒径能够通过改变氯金酸与白磷的投料摩尔比进行有效调控.采用X-射线粉末衍射光谱(XRD)、傅里叶变换红外光谱(FT-IR)和透射电子显微镜(TEM)和电化学测试来表征Au-PNPs的形貌、结构和表面组成.循环伏安测试表明,在pH7.4的磷酸缓冲溶液中,Au-PNPs修饰电极对葡萄糖电化学氧化有良好的催化性能.通过与柠檬酸钠还原法制得的金纳米粒子(Au-CitNPs)的电化学性质比较,发现Au-PNPs对葡萄糖的电催化氧化具有优良的稳定性.基于此Au-PNPs修饰电极的葡萄糖无酶电化学传感器对于葡萄糖检测具有宽的线性检测范围(9.0×10-6～1.8×10-2mol/L)和低的检出限(5.0×10-6mol/L).
Phosphorus modified gold nanoparticles (Au-PNPs) were prepared by the white phosphorous reduction method. The particle size of Au-PNPs could be effectively controlled by changing the feed molar ratio of chloroauric acid to white phosphorous. X-ray powder diffraction (XRD) , Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM) and electrochemical tests were used to characterize the morphology, structure and surface composition of Au-PNPs. Cyclic voltammetry measurements showed that at pH 7.4 phosphate buffer Au-PNPs modified electrode has good catalytic performance for the electrochemical oxidation of glucose.Compared with the electrochemical properties of gold nanoparticles prepared by sodium citrate reduction method (Au-CitNPs), we found that the Au-PNPs modified electrode Catalytic oxidation has excellent stability.Glucose enzyme-free electrochemical sensor based on this Au-PNPs modified electrode has a wide linear detection range (9.0 × 10-6 ~ 1.8 × 10-2mol / L) and a low detection rate Out of limit (5.0 × 10 -6 mol / L).