摘要
通过原位聚合法制备了金纳米颗粒(Au NPs)掺杂的聚苯胺(PANI)纳米复合材料,该复合材料修饰的电极(Au/PANI/GCE)对亚硝酸根(NO_(2)^(-))的氧化具有明显的电催化活性,其独特且均匀分散的蘑菇状结构可以掺杂更多的Au NPs,提供较多的活性位点和较大的比表面积,有助于提高电化学催化NO_(2)^(-)的效果。导电聚合物PANI中可质子化的苯胺(PhNH^(3+))与溶液中带负电荷的NO_(2)^(-)产生静电吸附可促进电子的传递。Au/PANI/GCE对NO_(2)^(-)的检出限为0.6876μmol/L,线性范围为10~2400μmol/L,线性相关系数R^(2)=0.9957,该传感器为实际湖水样品中亚硝酸盐检测提供了新方法。
In-situ polymerization was empolyed for fabricating polyaniline(PANI) nanocomposite doped with gold nano-particles(Au NPs). The electrode modified by Au/PANI nanocomposites(Au/PANI/GCE) exhibited distinguished electrocatalytic performance toward the oxidation of nitrite(NO_(2)^(-)). The unique and uniformly dispersed mushroom-shaped structure could dope more Au NPs, which could further provide more active sites and increase specific surface area. Moreover, this helped to improve the effect of electrochemical catalytic NO_(2)^(-).In addition, the protonated PANI(PhNH^(3+)) provided electrostatic adsorption sites for negatively charged NO_(2)^(-)which could promote the electron transfer. The Au/PANI/GCE presented a linear detection range of 10-2400 μmol/L(R^(2)=0.9957) with a detection limit of 0.6876 μmol/L for NO_(2)^(-). The as-prepared sensor provided an innovative approach for the determination of NO_(2)^(-)in real lake water.
作者
程文雪
郭浩民
罗敬朋
袁泽熙
张敏
程发良
CHENG Wenxue;GUO Haomin;LUO Jingpeng;YUAN Zexi;ZHANG Min;CHENG Faliang(Dongguan University of Technology,Dongguan 523808,China;Guangdong Engineering and Technology Research Center for Advanced Nanomaterials,Dongguan 523808,China)
出处
《分析试验室》
EI
CAS
CSCD
北大核心
2023年第3期291-296,共6页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金(21775022,21905046,52002068)
广东省普通高校创新强校工程项目(2020KTSCX151)
东莞市科技特派员项目(20201800500172)
东莞理工学院大学生创新创业训练项目(202011819191)资助。
作者简介
程文雪,女(1992-),硕士,助理实验师。研究方向:分析化学、电化学,Chengwx@dgut.edu.cn;通信作者:程发良,男(1967-),博士,教授。研究方向:生物传感器、燃料电池、电催化及储能器件,chengfl@dgut.edu.cn。
