基于Pt-PDDA/还原石墨烯纳米电极材料的构建及电化学检测4-氨基苯酚  

Construction and Electrochemical Detection of 4-Aminophenol Based on Pt-PDDA/Reduced Graphene Nano-Electrode Materials

作　　者：智晋峰 郝玺龙 白雅蓉 梁文婷 ZHI Jin-feng;HAO Xi-long;BAI Ya-rong;LIANG Wen-ting(Institute of Environmental Science,Shanxi University,Taiyuan 030006,China;Science&Technology Information and Strategy Research Center of Shanxi,Taiyuan 030024,China)

机构地区：[1]山西大学环境科学研究所,山西太原030006 [2]山西省科技情报与战略研究中心,山西太原030024

出　　处：《化学试剂》2024年第4期108-113,共6页Chemical Reagents

基　　金：邻苯二甲酸酯光电化学适配体传感器的构筑及其高性能响应机制的研究项目(21707082)。

摘　　要：通过Hummer法将天然石墨粉氧化得到氧化石墨,再将其超声分散于去离子水中形成稳定的氧化石墨分散液。为了引入铂粒子并使之与氧化石墨烯片牢固锚定,将氧化石墨分散液与氯铂酸溶液混,合成Pt-PDDA/还原石墨烯(Pt NPs-PDDA/rGO)纳米电极材料。通过红外、紫外光谱分析以及扫描循环伏安曲线、交流阻抗曲线对该复合电极材料进行了表征。由于铂优良的催化性能,聚二烯丙基二甲基氯化铵(PDDA)的防聚合功能,石墨烯巨大的表面积、优异的电子传导性能及对4-氨基苯酚(4-AP)强大的吸附作用,将制备得到的Pt-PDDA/还原石墨烯纳米电极材料构建电化学传感器,用于对4-AP超灵敏的检测。结果表明,在0.5 mol/L的磷酸盐缓冲液(PBS)中对不同浓度的4-AP进行测定,Pt NPs-PDDA/rGO复合膜修饰的GCE与裸露的GCE和功能化石墨烯(PDDA-rGO)修饰的GCE相比,4-AP的氧化还原峰电流显著增加,表明Pt NPs-PDDA/rGO具有对4-AP的电催化活性。然后对实验条件进行了优化,研究了不同实验条件对电化学传感器性能的影响。结果表明,在最理想的条件下,4-AP浓度在1.00×10^(-5)~1.00×10^(-3)mol/L范围内时,氧化峰电流与浓度呈良好的线性关系,相关系数为0.992 2。最后将其应用于河水和自来水中的4-AP检测,获得令人满意的结果,回收率为98.0%~106.0%。In this paper,graphite oxide was obtained by oxidizing natural graphite powder by Hummer′s method,and then ultrasonically dispersed in deionized water to form a stable graphite oxide dispersion.In order to introduce platinum particles and anchor them firmly to graphene oxide sheets,Pt-PDDA/reduced graphene(Pt NPs-PDDA/rGO)nanoelectrode materials were synthesized by mixing graphite oxide dispersion with chloroplatinic acid solution.The composite electrode material was characterized by infrared,ultraviolet spectral analysis,scanning cyclic voltammetry curves and AC impedance curves.Due to the excellent catalytic properties of platinum,the anti-polymerization function of Poly Diallyl Dimethyl Ammonium chloride(PDDA),the huge surface area of graphene,the excellent electron-conducting properties,and the strong adsorption of 4-aminophenol(4-AP),the electrochemical sensor constructed from Pt-PDDA/reduced graphene nanoelectrode materials were used for the ultra-sensitive detection of 4-AP.The results showed that the redox peak current of 4-AP was significantly increased in Pt NPs-PDDA/rGO composite membrane-modified GCE compared with bare GCE and functionalized graphene(PDDA-rGO)-modified GCE at different concentrations of 4-AP in 0.5 mol/L phosphate buffer solution(PBS),suggesting that Pt NPs-PDDA/rGO possesses the ability to electrocatalytic activity of 4-AP.Then the experimental conditions were optimized and the effects of different experimental conditions on the performance of electrochemical sensors were investigated.The results showed that under the optimal conditions,the oxidation peak current showed a good linear relationship with the concentration with a correlation coefficient of 0.9922 when the concentration of 4-AP was in the range of 1.00×10^(-5) to 1.00×10^(-3) mol/L.Finally,it was applied to the detection of 4-AP in the river water and tap water,and the satisfactory results were obtained with the recoveries ranging from 98.0%to 106.0%.

关 键 词：电化学 4-氨基苯酚 玻碳电极 铂催化剂 

分 类 号：O65[理学—分析化学]