基于多壁碳纳米管修饰电极的臭氧传感器研究  

Ozone sensor based on multi-wall carbon nanotube modified electrode

作　　者：晚豪 康天放[1] 鲁理平[1] WAN Hao;KANG Tian-fang;LU Li-ping(Key Laboratory of Beijing on Regional Air Pollution Control,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,环境与生命学部,北京100124

出　　处：《化学研究与应用》2023年第11期2635-2642,共8页Chemical Research and Application

基　　金：国家自然科学基金项目(22276005)资助。

摘　　要：本文将多壁碳纳米管(MWCNT)修饰到玻碳电极(GCE)界面,并基于臭氧(O_(3))与靛蓝三磺酸钾(ITS)的灵敏反应,间接实现了水中O_(3)的定量测定。利用扫描电镜和循环伏安法对该修饰电极进行了形貌和电化学性质表征。在最优实验条件下,溶液中ITS的方波伏安(SWV)峰电流在2.0×10^(-7)~6.4×10^(-5)mol·L^(-1)浓度范围内随ITS的浓度增大而呈线性增强,检测限为5×10^(-8)mol·L^(-1)。当体系中存在O_(3)时,ITS的SWV峰电流随臭氧浓度的增加而减小,往ITS溶液中加入臭氧溶液前后峰电流减小的差值与O_(3)浓度的对数值在5.0×10^(-9)~1.0×10^(-5)mol·L^(-1)范围内呈线性关系,检测限为1×10^(-9)mol·L^(-1),本方法具有灵敏度高,操作简便,重现性好的优点。In this paper,multi-walled carbon nanotubes(MWCNTs)were modified to the glassy carbon electrode(GCE)interface,and based on the sensitive reaction between ozone(O_(3))and potassium indigotrisulfonate(ITS),the quantitative determination of O_(3),in water was achieved indirectly.The morphology and electrochemical properties of the modified electrode were characterized by scanning electron microscopy and cyclic voltammetry.Under the optimal experimental conditions,the peak current of square wave voltammetry(SWV)of ITS in solution increases linearly with the concentration of ITS within the concentration range of 2.O×10^(-7)~6.4×10^(-5)mol·L^(-1),the detection limit is 5x10-8 mol·L^(-1).When O,exists in the system,the SWV peak current of ITS decreases with the increase of ozone concentration.The difference in peak current reduction befor and after adding ozone solution to the ITS solution has a linear relationship with the logarithmic value of O_(3),concentration in the range of 5.0×10^(-9)~1.0×10^(-5)mol·L^(-1),the limit of detection is 1×10^(-9)mol·L^(-1).This method has the advantages of high sensitivity,easy operation and good reproducibilty.

关 键 词：臭氧 传感器 多壁碳纳米管 靛蓝三磺酸钾 方波伏安法 

分 类 号：O657.1[理学—分析化学]