Preparation of porous SnO2 microcubes and their enhanced gas-sensing property

Title
Preparation of porous SnO2 microcubes and their enhanced gas-sensing property
Author(s)
심재진Liyou Wang[Liyou Wang]Cuiping Gu[Cuiping Gu]Zhijun Wang[Zhijun Wang]Yufeng Sun[Yufeng Sun]황지아루이
Keywords
VOLATILE ORGANIC-COMPOUNDS; SENSITIZED SOLAR-CELL; PHOTOCATALYTIC ACTIVITY; HOLLOW MICROSPHERES; OPTICAL-PROPERTIES; THIN-FILMS; SENSORS; ION; NANOPARTICLES; PERFORMANCE
Issue Date
201502
Publisher
ELSEVIER SCIENCE SA
Citation
SENSORS AND ACTUATORS B-CHEMICAL, v.207, pp.782 - 790
Abstract
Porous SnO2 microcubes were obtained through a facile chemical solution route with subsequent calcination and acid-washing process. Their structures and morphology evolution were comprehensively characterized via X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric-differential thermal analysis, and Brunauer-Emmett- Teller N-2 adsorption-desorption analyses. The process of inducing porosity starts with a crystalline single-phase MnSn(OH)(6) precursor formed by the co-precipitation of the metal ions from the aqueous solution. Thermal decomposition of the precursors leads to an intimate mixture of Mn3O4 and porous tetragonal SnO2. The SnO2 microcubes are obtained after a hydrothermal acid washing process. A decomposition-aggregation-dissolution process is proposed to demonstrate the formation of such special structure. Furthermore, the gas-sensing properties of the as-prepared porous SnO2 microcubes were investigated in toxic volatile organic compounds, such as formaldehyde, ethanol, benzene, methanol, acetone, and toluene. The enhanced sensing performance of porous SnO2 microcubes was demonstrated. The detection limits of formaldehyde and ethanol were approximately 0.09 and 0.12 ppm (signal-to-noise ratio, S/N = 3), respectively, which substantially benefitted from their unique porous structure and large surface area. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/33541http://dx.doi.org/10.1016/j.snb.2014.10.128
ISSN
0925-4005
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공과대학 > 화학공학부 > Articles
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