Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element
The gas sensing properties of Co3O4 and Co3O4:Y nano structures were investigated. The films were synthesized using the hydrothermal method on a seeded layer. The XRD, SEM analysis and gas sensing properties were investigated for Co3O4 and Co3O4:Y thin films. XRD analysis shows that all films are po...
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| Format: | Article |
| Language: | English |
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University of Baghdad, College of Science for Women
2019-03-01
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| Series: | مجلة بغداد للعلوم |
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| Online Access: | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3237 |
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| author | Hamdan et al. |
| author_facet | Hamdan et al. |
| author_sort | Hamdan et al. |
| collection | DOAJ |
| description | The gas sensing properties of Co3O4 and Co3O4:Y nano structures were investigated. The films were synthesized using the hydrothermal method on a seeded layer. The XRD, SEM analysis and gas sensing properties were investigated for Co3O4 and Co3O4:Y thin films. XRD analysis shows that all films are polycrystalline in nature, having a cubic structure, and the crystallite size is (11.7)nm for cobalt oxide and (9.3)nm for the Co3O4:10%Y. The SEM analysis of thin films obviously indicates that Co3O4 possesses a nanosphere-like structure and a flower-like structure for Co3O4:Y.
The sensitivity, response time and recovery time to a H2S reducing gas were tested at different operating temperatures. The resistance changes with exposure to the test gas. The results reveal that the Co3O4:10%Y possesses the highest sensitivity around 80% at a 100oC operating temperature when exposed to the reducing gas H2S with 0.8sec for both recovery and response times. |
| format | Article |
| id | doaj-art-0ff7ea0df06e463d845741e148ffe80a |
| institution | Kabale University |
| issn | 2078-8665 2411-7986 |
| language | English |
| publishDate | 2019-03-01 |
| publisher | University of Baghdad, College of Science for Women |
| record_format | Article |
| series | مجلة بغداد للعلوم |
| spelling | doaj-art-0ff7ea0df06e463d845741e148ffe80a2025-08-20T03:34:12ZengUniversity of Baghdad, College of Science for Womenمجلة بغداد للعلوم2078-86652411-79862019-03-0116110.21123/bsj.16.1.(suppl.).0221Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium ElementHamdan et al.The gas sensing properties of Co3O4 and Co3O4:Y nano structures were investigated. The films were synthesized using the hydrothermal method on a seeded layer. The XRD, SEM analysis and gas sensing properties were investigated for Co3O4 and Co3O4:Y thin films. XRD analysis shows that all films are polycrystalline in nature, having a cubic structure, and the crystallite size is (11.7)nm for cobalt oxide and (9.3)nm for the Co3O4:10%Y. The SEM analysis of thin films obviously indicates that Co3O4 possesses a nanosphere-like structure and a flower-like structure for Co3O4:Y. The sensitivity, response time and recovery time to a H2S reducing gas were tested at different operating temperatures. The resistance changes with exposure to the test gas. The results reveal that the Co3O4:10%Y possesses the highest sensitivity around 80% at a 100oC operating temperature when exposed to the reducing gas H2S with 0.8sec for both recovery and response times.http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3237Cobalt Oxide, H2S, Gas sensors, Sensitivity, Yttrium |
| spellingShingle | Hamdan et al. Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element مجلة بغداد للعلوم Cobalt Oxide, H2S, Gas sensors, Sensitivity, Yttrium |
| title | Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element |
| title_full | Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element |
| title_fullStr | Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element |
| title_full_unstemmed | Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element |
| title_short | Enhancement of Hydrothermally Co3O4 Thin Films as H2S Gas Sensor by Loading Yttrium Element |
| title_sort | enhancement of hydrothermally co3o4 thin films as h2s gas sensor by loading yttrium element |
| topic | Cobalt Oxide, H2S, Gas sensors, Sensitivity, Yttrium |
| url | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3237 |
| work_keys_str_mv | AT hamdanetal enhancementofhydrothermallyco3o4thinfilmsash2sgassensorbyloadingyttriumelement |