农业机械学报2017，Vol.48Issue(5)：188-192,5.DOI:10.6041/j.issn.1000-1298.2017.05.023
基于石墨烯气凝胶的全固态硝酸根离子选择性电极研究
All-solid-state Nitrate-selective Electrodes Based on Graphene Aerogels
摘要
Abstract
It is of great advantage for advanced potentiometric detection systems to develop ion-selective electrodes (ISEs) by using solid-state transducer materials.Conducting polymers are the most used solidstate transducing materials.However,their reliability is strongly related to their chemical stability and the formation of internal water films.The ISEs with the implementation of graphene as ion-to-electron transducer were reported.And it was found that the electric current for the graphene modified electrode was decreased with the decrease of thickness of the graphene transducing layer.Thus,a novel all-solidstate nitrate-selective electrode with implementation of 3D multilayer graphene aerogels (GAs) as solidcontact layer was developed.And the as-prepared GAs was characterized by transmission electron microscopy (TEM).The GAs films as transducer materials in potentiometric all-solid-state ISEs showed better electrochemical performance in reducing graphene oxide (RGO) films due to its multilayer structure,which was demonstrated by the cyclic voltammetry (CV).As a proof of concept,the performance of the newly developed electrode was evaluated on the basis of nitrate ions.And the hydrophobic nature of the GAs film was characterized via the potentiometric water layer test.The obtained results showed that graphene can significantly facilitate the ion-to-electron transducer and prevent the formation of water layer between the ion-selective membrane and the graphene layer.And the new nitrateselective electrode displayed a low detection limit of 10-4.2 mol/L.GAs offered great promise as a reliable high-performance transducer material for solid-state ISE sensors.Furthermore,the developed electrode exhibited fast response and excellent potential stability,which made it very promising for routine analysis and application.关键词
全固态离子选择性电极/石墨烯气凝胶/电位传感/硝酸根离子检测Key words
all-solid-state ion-selective electrode/graphene aerogels/potentiometric sensor/nitrate detection分类
农业科技引用本文复制引用
严玉婷,毛罕平,王坤,左志强..基于石墨烯气凝胶的全固态硝酸根离子选择性电极研究[J].农业机械学报,2017,48(5):188-192,5.基金项目
国家自然科学基金项目(31101082、61075036)、“十二五”国家科技支撑计划项目(2014BAD08B03)、江苏高校优势学科建设工程PAPD项目(苏政办发(2011)6号)和农业部农业信息技术重点实验室开放课题项目 （31101082、61075036）
