The photoelectrochemical sensor based on graphene-supported TiO2 mesocrystal for concanavalin A determination

Chen Sihong; Zhang Shupei; LI Yilin; Yan Huixiang; Gong Lingshan; Zhang Qingrong; Xu Guifang; Dai Hong

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The photoelectrochemical sensor based on graphene-supported TiO2 mesocrystal for concanavalin A determination

Chen Sihong #,Zhang Shupei,LI Yilin,Yan Huixiang,Gong Lingshan,Zhang Qingrong,Xu Guifang,Dai Hong *

College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian, 350007

*Correspondence author

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Funding: National Science Foundation of Fujian Province（No.2011J05020）, Foundation of Fuzhou Science and Technology Bureau（No.2013-S-113）, Education Department of Fujian Province（No.JA14071, JB14036, JA13068）, Fujian Normal University outstanding young teacher research fund projects（No.fjsdjk2012068）, NSFC （No.21205016）

Opened online: 5 April 2016

Accepted by: none

Citation: Chen Sihong,Zhang Shupei,LI Yilin.The photoelectrochemical sensor based on graphene-supported TiO2 mesocrystal for concanavalin A determination[OL]. [ 5 April 2016] http://en.paper.edu.cn/en_releasepaper/content/4682488

A signal-on photoelectrochemical sensing methodology for concanavalin A monitoring by coupling graphene-supported quasi-octahedral TiO2 mesocrystal with an efficient enzyme-free labeling strategy. Graphene with prominent conductivity enhancing the photocurrent response, NiCo2O4 labeling was proposed here accept the photo-induced electrons from conduction band of TiO2 mesocrystal, leading to the decrease of the photocurrent intensity. A signal-on non-enzymatic photoelectrochemical sensor was constructed based on immobilized concanavalin A competing with isolated concanavalin A of various concentrations for reaction with the NiCo2O4 labeled glucose conjugates, which opened a novel method for concanavalin A determination.

Keywords:photoelectrochemical biosensor; graphen; TiO2 mesocrystal; concanavalin A; NiCo2O4 nanosheets

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