摘要
石墨烯特有的褶皱层状结构以及银纳米粒子良好的催化性能,使其在电化学方面具有良好的应用潜能。本研究以柠檬酸钠为还原剂,通过水热反应原位制备出还原石墨烯/纳米银复合材料(rGO/Ag NPs),用于修饰玻碳电极,研究了双酚A的电化学行为。循环伏安法(CV)和方波伏安法(SWV)的实验结果表明,双酚A可以在r GO/Ag NPs修饰电极表面发生快速的氧化还原反应,基于此实现了对双酚A的高灵敏检测。在最优条件下,双酚A的氧化峰电流与其浓度在0.1~40.0μmol/L范围内呈良好的线性关系(r^2=0.996),检出限为50.7 nmol/L(S/N=3)。将其用于实际环境和塑料样品中双酚A的检测,回收率为91.7%~102.9%。
Graphene and silver nanoparticles showed good application potentials in electrochemistry due to their unique folded layered structure and good catalytic performance. In this work,reduced graphene oxide-Ag nanoparticles( r GO/Ag NPs) composite material was prepared in situ by using hydrothermal reduction synthesis method with sodium citrate as reducing agent. The material was then used as modified electrodes to study the electrochemical behaviors of bisphenol A( BPA). The results of cyclic voltammetry and square wave voltammetry showed that the fast oxidation-reduction reaction of BPA could occur on the r GO/Ag NPs modified glassy carbon electrode and lead to the sensitive determination of BPA. Under the optimal conditions,the oxidation current of BPA was linear to its concentration in the range of 0. 1-40. 0 μmol/L and the detection limit was 50.7 nmol/L( S/N = 3). The presented method was also used for the determination of BPA in plastic samples with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2017年第12期2011-2017,共7页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金项目(Nos.21475153
21575167
21675178和21675179)
广东省自然科学基金项目(Nos.2015A030311020
2016A030313358)
广东省公益研究与能力建设专项(No.2015A030401036)
广州市科技计划项目(No.201604020165)资助~~
关键词
还原石墨烯/纳米银复合材料
电化学检测
双酚A
Reduced graphene/silver nanoparticles composites
Electrochemical determination
Bisphenol A