{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:49:02Z","timestamp":1787028542536,"version":"build-2736575974"},"reference-count":32,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2024,7,23]],"date-time":"2024-07-23T00:00:00Z","timestamp":1721692800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Talent Introduction Program of Chengdu Normal University","award":["YJRC 2020-14"],"award-info":[{"award-number":["YJRC 2020-14"]}]},{"name":"Talent Introduction Program of Chengdu Normal University","award":["2023JG09"],"award-info":[{"award-number":["2023JG09"]}]},{"name":"Talent Introduction Program of Chengdu Normal University","award":["CXSY2024009"],"award-info":[{"award-number":["CXSY2024009"]}]},{"name":"Innovative Experimental Project of Chengdu Normal University","award":["YJRC 2020-14"],"award-info":[{"award-number":["YJRC 2020-14"]}]},{"name":"Innovative Experimental Project of Chengdu Normal University","award":["2023JG09"],"award-info":[{"award-number":["2023JG09"]}]},{"name":"Innovative Experimental Project of Chengdu Normal University","award":["CXSY2024009"],"award-info":[{"award-number":["CXSY2024009"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>The online monitoring of GIS equipment can be realized through detecting SF6 decomposition gasses. Metal oxide heterojunctions are widely used as gas-sensing materials. In this study, the structural and electrical properties of In2O3-ZnO and TiO2-ZnO heterojunctions were analyzed based on density functional theory calculations. After heterojunction structural optimization, the electrical conductivity of these two heterojunctions was enhanced compared to each intrinsic model, and the electrical conductivity is ranked as follows: In2O3-ZnO heterojunction &gt; TiO2-ZnO heterojunction. The gas-sensing response of these two heterojunctions to four SF6 decomposition gasses, H2S, SO2, SOF2, and SO2F2, was investigated. For gas adsorption systems, the adsorption energy, charge transfer, density of states, charge difference density, and frontier molecular orbitals were calculated to analyze the adsorption and gas-sensing performance. For gas adsorption on the In2O3-ZnO heterojunction surface, the induced conductivity changes are in the following order: H2S &gt; SO2F2 &gt; SOF2 &gt; SO2. For gas adsorption on the TiO2-ZnO heterojunction surface, H2S and SOF2 increase conductivity, and SO2 and SO2F2 decrease conductivity.<\/jats:p>","DOI":"10.3390\/ijms25158009","type":"journal-article","created":{"date-parts":[[2024,7,23]],"date-time":"2024-07-23T11:40:36Z","timestamp":1721734836000},"page":"8009","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Gas-Sensing Performance of Metal Oxide Heterojunction Materials for SF6 Decomposition Gases: A DFT Study"],"prefix":"10.3390","volume":"25","author":[{"given":"Tingting","family":"Zeng","sequence":"first","affiliation":[{"name":"College of Physics and Engineering, Chengdu Normal University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donglin","family":"Ma","sequence":"additional","affiliation":[{"name":"College of Physics and Engineering, Chengdu Normal University, Chengdu 611130, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1424-7082","authenticated-orcid":false,"given":"Yingang","family":"Gui","sequence":"additional","affiliation":[{"name":"College of Engineering and Technology, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"206","DOI":"10.1049\/hve2.12355","article-title":"Analysis of SF6 decomposed products by fibre-enhanced Raman spectroscopy for gas-insulated switchgear diagnosis","volume":"9","author":"Wang","year":"2024","journal-title":"High Volt."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1109\/MEI.2019.8735667","article-title":"Partial discharge detection and diagnosis in gas insulated switchgear: State of the art","volume":"35","author":"Khan","year":"2019","journal-title":"IEEE Electr. 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