纳米α-Fe_(2)O_(3)/壳聚糖修饰玻碳电极的电化学行为研究  

Electrochemical behavior ofα-Fe_(2)O_(3) nanoparticles/chitosan modified glassy carbon electrode

作　　者：陈丽娟[1] 黄惠[2] 沈培辉[1] Chen Lijuan;Huang Hui;Shen Peihui(Department of Safety Technology and Environmental Engineering,Fujian Chuanzheng Communications College,Fuzhou 350007;College of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116)

机构地区：[1]福建船政交通职业学院安全与环境学院,福州350007 [2]福州大学机械工程及自动化学院,福州350116

出　　处：《化工新型材料》2024年第9期149-153,162,共6页New Chemical Materials

基　　金：国家自然科学基金(52105053);福建省自然科学基金项目(2020J01452和2022J01389);福建船政交通职业学院校级科技服务团队环境污染及治理研究项目(20200202)。

摘　　要：通过不同温度煅烧获得不同比表面积的α-Fe_(2)O_(3)纳米颗粒,将纳米α-Fe_(2)O_(3)与壳聚糖制成复合材料。利用滴涂法,将纳米α-Fe_(2)O_(3)/壳聚糖复合材料修饰在玻碳电极上,并通过循环伏安法研究纳米α-Fe_(2)O_(3)/壳聚糖/玻碳电极对铁氰化钾电化学性能的影响。结果表明:随着烧结温度从280℃提高到700℃时,α-Fe_(2)O_(3)纳米颗粒的比表面积由136.5m^(2)/g变为2.1m^(2)/g。纳米α-Fe_(2)O_(3)/壳聚糖/玻碳电极能显著提高铁氰化钾的电化学性能,与裸电极相比,氧化和还原电流均显著提高,其电化学催化性能与其纳米α-Fe_(2)O_(3)比表面积密切相关,比表面积越大峰电流就越强。在最佳实验条件下,浓度在510^(-4)~510^(-3)mol/L范围内,铁氰化钾的还原电流与浓度呈良好的线性关系,检出限为1.25×10^(-5)mol/L,该修饰电极重复性和稳定性较好。α-Fe_(2)O_(3)nanoparticles with different surface areas were obtained by calcination at different temperatures and then were combined with chitosan to form a composite material.Theα-Fe_(2)O_(3)nanoparticles/chitosan composite was modified on a glassy carbon electrode by the drop coating method,and the effect of theα-Fe_(2)O_(3)nanoparticles/chitosan/glassy carbon on the electrochemical performance of potassium ferricyanide was studied by cyclic voltammetry.The results showed that the surface area ofα-Fe_(2)O_(3)nanoparticles changed from 136.5m 2/g to 2.1m 2/g as the sintering temperature increased from 280℃to 700℃.Theα-Fe_(2)O_(3)nanoparticles/chitosan/glassy carbon electrode could significantly improve the electrochemical performance of potassium ferricyanide.Compared with the bare electrode,the oxidation and reduction currents were significantly increased.Its electrochemical catalytic performance was closely related to its surface area of theα-Fe_(2)O_(3)nanoparticles.The larger the specific surface area,the stronger the peak current.Under the optimal experimental conditions,in the range of concentration from 5×10^(-4) to 5×10^(-3) mol/L,the reduction current of potassium ferricyanide had a good linear relationship with the concentration,with a detection limit of 1.25×10^(-5) mol/L,and the modified electrode had good repeatability and stability.

关 键 词：纳米 α-Fe_(2)O_(3) 循环伏安法 电化学检测 铁氰化钾 

分 类 号：O657.1[理学—分析化学]