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Reference type: Journal
Authors: Zhang YN, Nong FQ, Shi HJ, Chai SN, Huang XF, Zhao GH, Zhang YG, Zhang YL
Article Title: Enhanced selective photoelectrochemical oxidation for small organic molecules derived from molecularly imprinted single crystalline ZnO nanorods electrodes.
Publication date: 2013
Journal: Electrochemistry Communications
Volume: 33
Page numbers: 5-9.
DOI: 10.1016/j.elecom.2013.04.003
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1388248113001355

Abstract: To solve the problem of poor selectivity on photoelectrochemical (PEC) oxidation toward small organic molecules especially has the similar chemical structures, a novel method in this work was proposed for achieving a high selective PEC oxidation by constructing molecularly imprinted sites on a single crystalline (SC) ZnO surface (imp-ZnO). Though a crystal-seed-assisted hydrothermal method, the phenol (C6H5-OH) imp-ZnO and p-hydroxybenzoic acid (PHBA, HOOC-C6H4-OH) imp-ZnO electrodes were prepared, which were in the form of vertically aligned nanorods with maintained single crystalline. The results showed the high selective PEC oxidation capabilities were obtained on SC imp-ZnO electrodes toward target between phenol and PHBA, with selective factor R of 5.64 and 2.38 respectively. This was attributed to their excellent imprinted expression with high value of imprinting factor S (1.86 and 1.55), deriving from an obvious difference of photocurrent enhancement (5.5-8 times) on SC imp-ZnO between target and nontarget. Such kind of single crystalline ZnO substrate is essential to constructed high-quality molecularly imprinted sites with clear size and hard shape for a great recognition effect
Template and target information: phenol, p-hydroxybenzoic acid, PHBA, 4-hydroxybenzoic acid
Author keywords: Single crystalline, ZnO nanorods, molecular imprinting technique, Selective photoelectrochemical, Target organic molecule

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