Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 221, Issue -, Pages 55-62Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.06.040
Keywords
ZnFe2O4; Nanoparticles; Gas sensor; Acetone
Funding
- National Science Foundation of China (NSFC) [21471001, 21275006]
- Natural Science Foundation of Anhui Province [1508085MB22]
- 211 Project of Anhui University
- Key Laboratory of Environment Friendly Polymer Materials of Anhui Province
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ZnFe2O4 nanoparticles with diameter of ca.10 nm were successfully synthesized under hydrothermal conditions without using any surfactant or structure-directing agents. The structure, composition and morphology of the samples were characterized by means of powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectra (DRS) and the Brunauer-Emmett-Teller (BET) surface area measurement. The results showed that the mole ratio of reactants ZnO to FeCl3 played an important role in controlling the composition and morphology of the products. BET specific surface area of ZnFe2O4 nanopartides was evaluated to be 115.6 m(2) g(-1). Interestingly, as-prepared ZnFe2O4 nanoparticles displayed enhanced gas sensing performance to acetone, which response value reached 39.5 for 200 ppm acetone gas at lower optimum working temperature of 200 degrees C, in comparison with the precursor ZnO (4.2) at the same condition. The gas sensing property demonstrates that as-prepared ZnFe2O4 has potential applications in the detection of acetone. (C) 2015 Elsevier B.V. All rights reserved.
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