title: Electrochemical sensing of glucose by carbon cloth-supported Co3O4/PbO2 core-shell nanorod arrays.
abstract: A novel electrochemical sensor for the detection of glucose was constructed based on the use of Co3O4/PbO2 core-shell nanorod arrays as electrocatalysts. In this paper the Co3O4/PbO2 core-shell nanorod arrays grow directly on a flexible carbon cloth substrate by the combination of hydrothermal synthesis and electrochemical deposition methods. The as-prepared hierarchical nanocomposites show the structural characteristics of nanowire core and nanoparticle shell. The carbon cloth-supported Co3O4/PbO2 nanorod array electrode exhibits higher sensitivity (460.3 μA mM(-1)cm(-2) in the range from 5 μM to 1.2mM) and lower detection limit (0.31 μM (S/N=3)) than the carbon cloth-supported Co3O4 nanowire array electrode. Both the three-dimensional network of carbon cloth substrate and the hierarchical nanostructure of binary Co3O4/PbO2 composites make such an electrode have high electrocatalytic activity towards the glucose oxidation. Due to the excellent sensitivity, repeatability and anti-interference ability, the carbon cloth-supported Co3O4/PbO2 nanorod arrays will be the promising materials for fabricating practical non-enzymatic glucose sensors.
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Chen
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Li
authors.forename: Cuicui
authors.initials: C
authors.lastname: Qiu
authors.forename: Wencai
authors.initials: W
authors.lastname: Zhu
authors.forename: Houyi
authors.initials: H
authors.lastname: Ma
authors.forename: Shenhao
authors.initials: S
authors.lastname: Chen
authors.forename: Oliver
authors.initials: O
authors.lastname: Meng
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry; D005947:Glucose / Q000737:chemistry / Q000302:isolation & purification*; D006801:Humans; D007854:Lead / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry
chemical_list: D010087:Oxides; D007854:Lead; D003035:Cobalt; C047365:lead oxide; D002244:Carbon; D005947:Glucose; C060728:cobalt oxide
keywords: Carbon cloth; Co(3)O(4)/PbO(2); Glucose; Nanorod array; Non-enzymatic sensor