Citation: FAN Yong-Mei, ZHANG Ji-Mei, MI Chao, CAI Yu-Ling, ZHANG Li-Ping, ZHU Hai-Bin. Preparation of Polydiallyl Dimethyl Ammonium Chloride Modified Reduced Graphene Oxide/Zinc Oxide Composite Materials and Its Application in Detection of Uric Acid. Chinese Journal of Analytical Chemistry, 2018, 46(1): 33-38. doi: 10.11895/j.issn.0253-3820.171059 [复制]
Preparation of Polydiallyl Dimethyl Ammonium Chloride Modified Reduced Graphene Oxide/Zinc Oxide Composite Materials and Its Application in Detection of Uric Acid
以水合肼为还原剂，硝酸锌为前驱体，采用原位还原法同时还原氧化石墨烯（GO）和硝酸锌，制备了聚二烯丙基二甲基氯化铵（PDDA）改性石墨烯/氧化锌复合材料（PDDA-rGO/ZnO）。采用傅里叶红外光谱（FTIR）、X射线衍射（XRD）和透射电子显微镜（TEM）对复合材料进行了表征，并通过循环伏安（CV）和线性扫描伏安（LSV）电化学测试方法，研究了PDDA-rGO/ZnO修饰玻碳电极对尿酸（UA）的检测性能。结果表明，此修饰电极对UA表现出良好的电催化活性，具有良好的抗干扰性、重现性和稳定性。采用线性扫描伏安法检测UA的线性范围为0.02~0.10 mmol/L和0.10~1.00 mmol/L，检出限为15.9 nmol/L（S/N=3）。
By using zinc nitrate as precursor and hydrazine hydrate as reducing agent, polydiallyl dimethyl ammonium chloride modified reduced graphene oxide/zinc oxide composite materials (PDDA-rGO/ZnO) were prepared by simultaneous reduction of graphene oxide (GO) and zinc nitrate. The composite materials were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometer (XRD) and transmission electron microscopy (TEM), and their electrochemical catalytic activity for uric acid was studied by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) measurements. The result showed that PDDA-rGO/ZnO modified glassy carbon electrode prepared here was sensitive, reproducible and stable, and had significant electrocatalytic activity for UA. When using linear sweep voltammetry for detection of UA, the responses of modified electrode were linear with UA concentration in the ranges of 0.02-0.1 mmol/L and 0.1-1.0 mmol/L respectively, with detection limit of 15.9 nmol/L (S/N=3).
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