基于CeO_(2)/V_(2)CT_(x)纳米复合材料的的电化学传感器用于羟基自由基的检测  

Electrochemical Sensors Based on CeO_(2)/V_(2)CT_(x) Nanocomposites for the Detection of Hydroxyl Radicals

作　　者：靖硕硕 姚宇 丁亚新 赵雪伶[1,2,3,4] JING Shuoshuo;YAO Yu;DING Yaxin;ZHAO Xueling(School of Energy and Materials,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Engineering Research Center of Advanced Thermal Functional Materials,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Thermophysical Properties Big Data Professional Technical Service Platform,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学能源与材料学院,上海201209 [2]上海第二工业大学上海先进热功能材料工程技术研究中心,上海201209 [3]上海第二工业大学上海市工程材料应用与评价重点实验室,上海201209 [4]上海第二工业大学上海市热物性大数据专业技术服务平台,上海201209

出　　处：《上海第二工业大学学报》2023年第2期89-97,共9页Journal of Shanghai Polytechnic University

基　　金：上海市科委扬帆计划(17YF1406600);上海市教委晨光计划(18CG68)资助。

摘　　要：羟基自由基(·OH)的检测在人类各种疾病的发病研究进展中起着重要作用。目前基于电化学方法检测·OH的研究主要集中在有机材料载体方面。由于有机载体在极端环境中容易降解,导致以有机材料为载体的传感器稳定性和重复性都很差。虽然有一些基于无机传感材料用于·OH的检测,对于稳定性与重复性的改善成效显著,但是其有效活性位点数和导电性能的提升仍有很大的空间。通过简单的超声方法成功合成了CeO_(2)/V_(2)CT_(x)纳米复合材料,构建了用于·OH检测的电化学传感器,该传感器具有良好的选择性和较宽的线性范围(0.3-6 mmol/L),对OH的检测限低至0.48μmol/L。传感性能的提高可以从2个方面解释:①由于V_(2)CT_(x)丰富的官能团使得·OH能够被快速吸附,从而引发具有双重氧化态(即Ce^(3+)和Ce^(4+))的CeO_(2)产生电化学反应信号;②V_(2)CT_(x)的高导电性为电信号的长距离传输提供了途径。The detection of hydroxyl radical(·OH)plays an important role in the pathogenesis of various human diseases.At present,the research on the detection of ·OH based on electrochemical methods mainly focuses on the organic material carrier.However,due to the easy degradation of organic carriers in extreme environments,the stability and repeatability of sensors based on organic materials are very poor.Furthermore,some inorganic sensing materials have been used in the detection of·OH,which have achieved remarkable results in improving the stability and repeatability,but there is still much room for improvement in the number of effective active sites and conductivity.CeO_(2)/V_(2)CT_(x)nanocomposites were successfully synthesized by simple ultrasonic method,and an electrochemical sensor forOH detection was constructed.The sensor has good selectivity and wide linear range(0.3-6 mmol/L).At the same time,the limit of detection of·OH is as low as 0.48μmol/L.The improvement of sensing performance can be explained from two aspects:①because of the rich functional groups of V_(2)CT_(x),·OH can be rapidly adsorbed,which leads to the electrochemical reaction signal of CeO_(2)with double oxidation states(i.e.Ce^(3+)and Ce^(4+));②the high conductivity of V_(2)CT_(x)provides a way for long-distance transmission of electrical signals.

关 键 词：MXene材料 二氧化铈 电化学传感器 羟基自由基 

分 类 号：O657.1[理学—分析化学]