Polyoxometalate-grafted graphene nanohybrid for electrochemical detection of hydrogen peroxide and glucose

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• 作者：MinHo Yang^a ; Dong Seok Kim^b ; Tae Jae Lee^a ; Seok Jae Lee^a ; Kyoung G. Lee^a ; ^{kglee@nnfc.re.kr" class="auth_mail" title="E-mail the corresponding author} ; Bong Gill Choi^b ; ^{bgchoi@kangwon.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Polyoxometalate ; Graphene ; Nanohybrid ; Ionic liquid ; Electrochemical sensor
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：15 April 2016
• 年：2016
• 卷：468
• 期：Complete
• 页码：51-56
• 全文大小：1866 K

文摘

The electrochemical performances of electrochemical biosensors largely depend on electrode characteristics, such as size, composition, surface area, and electron and ion conductivities. Herein, highly efficient electrocatalytic polyoxometalate (POM) was directly deposited on polymeric ionic liquid (PIL)-functionalized reduced graphene oxide (rGO) in a simple manner. The nano-sized POM with PIL functional groups was uniformly distributed on the surface of rGO sheets. The unique nanostructure of the resultant POM-g-rGO nanohybrids enabled well-defined multiple redox reaction of POMs and rapid electron transfer. In particular, as-prepared nanohybrids demonstrated high electrocatalytic activity for the electrochemical detection of H₂O₂ and glucose molecules in flow-injection biosensor device with high sensitivity, rapid response time, and low detection limit.