Yu. S. Haiduk, I. A. Taratyn, A. E. Usenka, D. V. Ivashenko, V. V. Pankov
{"title":"基于in2o3 -石墨烯复合材料的单电极气体传感器","authors":"Yu. S. Haiduk, I. A. Taratyn, A. E. Usenka, D. V. Ivashenko, V. V. Pankov","doi":"10.1134/S0020168524700870","DOIUrl":null,"url":null,"abstract":"<p>Indium oxide–graphene (In<sub>2</sub>O<sub>3</sub>/Gr) composites (2.0 and 4.0 wt % graphene) have been prepared by sol–gel synthesis and the microstructure and gas-sensing properties of the composites (in the composition of single-electrode ceramic sensors) have been studied. The composites have the form of heterogeneous systems formed by the In<sub>2</sub>O<sub>3</sub> phase ranging in crystallite size from 7 to 12 nm and the graphene phase. The microstructure of the composites has been shown to depend on the fabrication process. The In<sub>2</sub>O<sub>3</sub>/Gr-based sensors have higher sensitivity to reducing (CH<sub>4</sub>) and oxidizing (NO<sub>2</sub>) gases than do In<sub>2</sub>O<sub>3</sub>-based sensors and shorter response and recovery times. Possible causes of their better gas sensitivity are the formation of spatially separated positively and negatively charged regions, which leads to electron concentration redistribution in individual phases; the increased defect density in the indium oxide and graphene phases in the composite; and the large specific surface area of graphene.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 5","pages":"620 - 630"},"PeriodicalIF":0.9000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Single-Electrode Gas Sensors Based on an In2O3–Graphene Composite\",\"authors\":\"Yu. S. Haiduk, I. A. Taratyn, A. E. Usenka, D. V. Ivashenko, V. V. Pankov\",\"doi\":\"10.1134/S0020168524700870\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Indium oxide–graphene (In<sub>2</sub>O<sub>3</sub>/Gr) composites (2.0 and 4.0 wt % graphene) have been prepared by sol–gel synthesis and the microstructure and gas-sensing properties of the composites (in the composition of single-electrode ceramic sensors) have been studied. The composites have the form of heterogeneous systems formed by the In<sub>2</sub>O<sub>3</sub> phase ranging in crystallite size from 7 to 12 nm and the graphene phase. The microstructure of the composites has been shown to depend on the fabrication process. The In<sub>2</sub>O<sub>3</sub>/Gr-based sensors have higher sensitivity to reducing (CH<sub>4</sub>) and oxidizing (NO<sub>2</sub>) gases than do In<sub>2</sub>O<sub>3</sub>-based sensors and shorter response and recovery times. Possible causes of their better gas sensitivity are the formation of spatially separated positively and negatively charged regions, which leads to electron concentration redistribution in individual phases; the increased defect density in the indium oxide and graphene phases in the composite; and the large specific surface area of graphene.</p>\",\"PeriodicalId\":585,\"journal\":{\"name\":\"Inorganic Materials\",\"volume\":\"60 5\",\"pages\":\"620 - 630\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2025-03-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0020168524700870\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S0020168524700870","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Single-Electrode Gas Sensors Based on an In2O3–Graphene Composite
Indium oxide–graphene (In2O3/Gr) composites (2.0 and 4.0 wt % graphene) have been prepared by sol–gel synthesis and the microstructure and gas-sensing properties of the composites (in the composition of single-electrode ceramic sensors) have been studied. The composites have the form of heterogeneous systems formed by the In2O3 phase ranging in crystallite size from 7 to 12 nm and the graphene phase. The microstructure of the composites has been shown to depend on the fabrication process. The In2O3/Gr-based sensors have higher sensitivity to reducing (CH4) and oxidizing (NO2) gases than do In2O3-based sensors and shorter response and recovery times. Possible causes of their better gas sensitivity are the formation of spatially separated positively and negatively charged regions, which leads to electron concentration redistribution in individual phases; the increased defect density in the indium oxide and graphene phases in the composite; and the large specific surface area of graphene.
期刊介绍：
Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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