采用不同活化剂制备分级多孔碳用于二羟基苯异构体的电化学传感分析  

Preparation of Hierarchically Porous Carbon Using Different Activators and Its Electrochemical Sensing of Dihydroxybenzene Isomers

作　　者：韦良 黄信龙 王彦力 杨晶 闫飞燕 宁德娇 唐莉 罗丽红 韦宇宁 牙禹 WEI Liang;HUANG Xin-Long;WANG Yan-Li;YANG Jing;YAN Fei-Yan;NING De-Jiao;TANG Li;LUO Li-Hong;WEI Yu-Ning;YA Yu(College of Chemistry and Materials Science,Nanning Normal University,Nanning 530001,China;Institute for Agricultural Product Quality Safety and Testing Technology,Guangxi Academy of Agricultural Sciences,Nanning 530007,China)

机构地区：[1]南宁师范大学化学与材料学院,南宁530001 [2]广西壮族自治区农业科学院农产品质量安全与检测技术研究所,南宁530007

出　　处：《分析化学》2022年第6期899-911,共13页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21862004);广西自然科学基金项目(Nos.2018GXNSFAA281230,2018GXNSFAA281228);“科技先锋队‘强农富民’‘六个一’专项行动”桂科盟项目(No.202216);广西农科院优势学科团队项目(No.2021YT136);广西研究生教育创新计划项目(YCSW2020193)资助。

摘　　要：以壳聚糖(CS)为碳源,分别以NaCl、Na_(2)CO_(3)和NaOH为活化剂,制备了分级多孔碳材料,采用扫描电镜、X射线衍射、拉曼光谱、N;吸附-脱附等技术对其形貌、结构、比表面积及孔径分布进行研究;采用电化学技术研究不同碳材料修饰电极的电化学性能,探究材料的形貌结构和理化参数与碳材料电化学传感性能之间的构效关系。研究结果表明,以Na_(2)CO_(3)为活化剂制备的分级多孔碳材料(CS-Na_(2)CO_(3))修饰电极具有更大的电化学活性面积和更快的电子转移速率,并对3种二羟基苯异构体(对苯二酚、邻苯二酚和间苯二酚)表现出更优异的电催化性能。基于CS-Na_(2)CO_(3)的电化学信号增强作用,构建了一种对苯二酚、邻苯二酚和间苯二酚连续测定的电化学传感平台,3种分析物的氧化峰电流与浓度分别在0.050~1.5μmol/L、0.050~1.5μmol/L和0.50~15μmol/L范围内呈线性关系,检出限(3σ)分别为0.012、0.017和0.29μmol/L。将本传感平台用于江水样品分析,展示出良好的准确度。The hierarchically porous carbon materials were prepared with chitosan(CS)as carbon source, and NaCl, NaOH and Na_(2)CO_(3)as activators. The morphology, porous structure, specific surface area and pore size distribution of the prepared carbon materials were characterized by scanning electron microscopy, X-ray diffraction, Raman spectrum and nitrogen adsorption-desorption isotherms,respectively. And the electrochemical properties of different carbon materials-modified electrode were studied by electrochemical techniques. Thus, structure-activity relationship between the morphology,structural and physicochemical parameters of different carbon materials and their electrochemical sensing properties were explored. The results showed that the hierarchically porous carbon material(CS-Na_(2)CO_(3),prepared using Na_(2)CO_(3)as activator)modified electrode had larger electrochemical active area, faster electron transfer rate and better electrocatalytic performance for three dihydroxybenzene isomers. A highperformance electrochemical sensing platform for simultaneous determination of hydroquinone, catechol and resorcinol was constructed based on the signal enhancement effect of CS-Na_(2)CO_(3). The linear ranges for simultaneous determination of hydroquinone, catechol and resorcinol were 0.050–1.5 μmol/L,0.050–1.5 μmol/L and 0.50–15 μmol/L, and the detection limits (3σ)were calculated to be 0.012, 0.017 and0.29 μmol/L, respectively. The prepared sensing platform demonstrated good accuracy in detection of dihydroxybenzene isomers in river water samples.

关 键 词：活化剂 分级多孔碳材料 电化学传感分析 构效关系 二羟基苯异构体 

分 类 号：X832[环境科学与工程—环境工程] O657.1[理学—分析化学] TQ127.11[理学—化学]