Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces
Sb2O3-loaded NaWO4-doped WO3 nanorods were fabricated with varying Sb contents from 0 to 2 wt% by precipitation/impregnation methods and their p-type acetylene (C2H2) gas-sensing mechanisms were rigorously analyzed. Material characterization by X-ray diffraction, X-ray photoelectron spectroscopy, sc...
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th-cmuir.6653943832-703702020-10-14T08:48:49Z Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces Nataporn Kotchasak Kanittha Inyawilert Anurat Wisitsoraat Adisorn Tuantranont Sukon Phanichphant Duangdao Channei Visittapong Yordsri Chaikarn Liewhiran Chemistry Physics and Astronomy Sb2O3-loaded NaWO4-doped WO3 nanorods were fabricated with varying Sb contents from 0 to 2 wt% by precipitation/impregnation methods and their p-type acetylene (C2H2) gas-sensing mechanisms were rigorously analyzed. Material characterization by X-ray diffraction, X-ray photoelectron spectroscopy, scanning transmission electron microscopy and nitrogen adsorption indicated the construction of short NaWO4-doped monoclinic WO3 nanorods loaded with very fine Sb2O3 nanoparticles. The sensors were fabricated by powder pasting and spin coating and their gas-sensing characteristics were evaluated towards 0.08-1.77 vol% C2H2 at 200-350 °C in dry air. The gas-sensing properties of the NaWO4-doped WO3 sensor with the optimum Sb content of 1 wt% showed the highest p-type response of ∼250.2 to 1.77 vol% C2H2, which was more than 20 times as high as that of the unloaded one at the best working temperature of 250 °C. Furthermore, the Sb2O3-loaded sensor offered high C2H2 selectivity against CH4, H2, C3H6O, C2H5OH, HCHO, CH3OH, C8H10, C7H8, C2H4 and NO2. Mechanisms responsible for the observed p-type sensing and response enhancement behaviors were proposed based on the NaWO4-doped WO3-Sb2O3 (p-n) heterointerfaces and catalytic spillover effects. Consequently, the Sb2O3-loaded NaWO4-doped WO3 nanorods have potential as alternative p-type gas sensors for selective and sensitive C2H2 detection in various industrial applications. 2020-10-14T08:28:28Z 2020-10-14T08:28:28Z 2020-09-23 Journal 14639084 2-s2.0-85091540585 10.1039/d0cp01444c https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85091540585&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/70370 |
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Chemistry Physics and Astronomy Nataporn Kotchasak Kanittha Inyawilert Anurat Wisitsoraat Adisorn Tuantranont Sukon Phanichphant Duangdao Channei Visittapong Yordsri Chaikarn Liewhiran Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
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Sb2O3-loaded NaWO4-doped WO3 nanorods were fabricated with varying Sb contents from 0 to 2 wt% by precipitation/impregnation methods and their p-type acetylene (C2H2) gas-sensing mechanisms were rigorously analyzed. Material characterization by X-ray diffraction, X-ray photoelectron spectroscopy, scanning transmission electron microscopy and nitrogen adsorption indicated the construction of short NaWO4-doped monoclinic WO3 nanorods loaded with very fine Sb2O3 nanoparticles. The sensors were fabricated by powder pasting and spin coating and their gas-sensing characteristics were evaluated towards 0.08-1.77 vol% C2H2 at 200-350 °C in dry air. The gas-sensing properties of the NaWO4-doped WO3 sensor with the optimum Sb content of 1 wt% showed the highest p-type response of ∼250.2 to 1.77 vol% C2H2, which was more than 20 times as high as that of the unloaded one at the best working temperature of 250 °C. Furthermore, the Sb2O3-loaded sensor offered high C2H2 selectivity against CH4, H2, C3H6O, C2H5OH, HCHO, CH3OH, C8H10, C7H8, C2H4 and NO2. Mechanisms responsible for the observed p-type sensing and response enhancement behaviors were proposed based on the NaWO4-doped WO3-Sb2O3 (p-n) heterointerfaces and catalytic spillover effects. Consequently, the Sb2O3-loaded NaWO4-doped WO3 nanorods have potential as alternative p-type gas sensors for selective and sensitive C2H2 detection in various industrial applications. |
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Journal |
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Nataporn Kotchasak Kanittha Inyawilert Anurat Wisitsoraat Adisorn Tuantranont Sukon Phanichphant Duangdao Channei Visittapong Yordsri Chaikarn Liewhiran |
author_facet |
Nataporn Kotchasak Kanittha Inyawilert Anurat Wisitsoraat Adisorn Tuantranont Sukon Phanichphant Duangdao Channei Visittapong Yordsri Chaikarn Liewhiran |
author_sort |
Nataporn Kotchasak |
title |
Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
title_short |
Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
title_full |
Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
title_fullStr |
Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
title_full_unstemmed |
Chemophysical acetylene-sensing mechanisms of Sb<inf>2</inf>O<inf>3</inf>/NaWO<inf>4</inf>-doped WO<inf>3</inf> heterointerfaces |
title_sort |
chemophysical acetylene-sensing mechanisms of sb<inf>2</inf>o<inf>3</inf>/nawo<inf>4</inf>-doped wo<inf>3</inf> heterointerfaces |
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2020 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85091540585&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/70370 |
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1681752890421542912 |