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Indexed by:期刊论文

Date of Publication:2015-02-01

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI

Volume:207

Issue:Part A

Page Number:66-73

ISSN No.:0925-4005

Key Words:Hydrothermal route; Toluene; Bond dissociation energy; Charge transfer

Abstract:A facile and efficient hydrothermal route was used to synthesize flower-like ZnO. The morphology and composition of ZnO were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD results that pure ZnO were formed without any other impurity peaks. Uniformly distributed flower-like ZnO were clearly observed from the SEM images. A possible growth model was proposed to simulate the formation of flower-like ZnO. The fabricated ZnO sensors exhibited good response to toluene than to other interfering gases such as acetone, ammonia and benzene. On the perspective of bond dissociation energy discrepancy, the good selectivity of the ZnO sensor to toluene was explained in detail. A reasonable sensing mechanism of ZnO sensor to toluene was proposed in the aspect of charge transfer. (C) 2014 Elsevier B.V. All rights reserved.