Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 484, Issue -, Pages 51-59Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.08.056
Keywords
Gas sensor; Honey comb-like microstructure; La2O3; Thin film; Supercapacitor
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Funding
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant - Korea government Ministry of Trade, Industry and Energy [20124010203180]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2015R1A2A2A01006856]
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The porous honey comb-like La2O3 thin films have been synthesized using one step spray pyrolysis method. The influence of sprayed solution quantity on properties of La2O3 thin films is studied using X-ray diffraction, Fourier transform spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, optical absorption and Brunauer-Emmett-Teller techniques. Morphology of La2O3 electrode is controlled with sprayed solution quantity. The supercapacitive properties of La2O3 thin film electrode are investigated using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance techniques. The La2O3 film electrode exhibited the specific capacitance of the 166 F g(-1) with 85% stability for the 3000 cycles. The La2O3 film electrode exhibited sensitivity of 68 at 523 K for 500 ppm CO2 gas concentration. The possible CO2 sensing mechanism is discussed. (C) 2016 Elsevier Inc. All rights reserved.
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