One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances
In this study we report, for the first time, the synthesis of Co-doped NiO microspheres assembled by two-dimension nanosheets using a facile solvothermal method. The H2S gas-sensing performance of the as-prepared samples was systematically investigated. The result demonstrates that the Co–NiO sensor...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2023-10-01
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| Series: | ChemPhysMater |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772571523000207 |
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| author | Wenjing Du Jinbo Zhao Fenglong Wang Huan Yang Ling Chen Xingyu Yao Lili Wu Jiurong Liu |
| author_facet | Wenjing Du Jinbo Zhao Fenglong Wang Huan Yang Ling Chen Xingyu Yao Lili Wu Jiurong Liu |
| author_sort | Wenjing Du |
| collection | DOAJ |
| description | In this study we report, for the first time, the synthesis of Co-doped NiO microspheres assembled by two-dimension nanosheets using a facile solvothermal method. The H2S gas-sensing performance of the as-prepared samples was systematically investigated. The result demonstrates that the Co–NiO sensor with Co/Ni molar ratio of 1% (1% Co–NiO) exhibits high response (12.9) and rapid response speed (110 s) to 20×10−6 H2S at 200 °C in comparison with the pure NiO sensor. Moreover, excellent selectivity, repeatability, and stability were achieved. The sensing mechanism illustrates that the superior gas-sensing properties can be attributed to two factors. (1) The hierarchical microspherical construction with an ultrahigh specific surface area of 163.1 m2 g−1 provides adequate active sites for H2S gas adsorption, porous structures, and an interlayer gap that accelerates the diffusion of H2S gas, resulting in improved sensitivity and response speed of the sensor. (2) Co-doping results in a decrease in the particle sizes (ca. 4 nm) and increase in the number of adsorbed ionized oxygen species, which improves sensitivity and selectivity. Therefore, this study provides a facile approach for the synthesis of hierarchical Co–NiO microspheres with enhanced H2S gas-sensing performance. |
| first_indexed | 2024-03-11T15:31:25Z |
| format | Article |
| id | doaj.art-ac78f5fb315048d7a7769c9af3c0b0c4 |
| institution | Directory Open Access Journal |
| issn | 2772-5715 |
| language | English |
| last_indexed | 2024-03-11T15:31:25Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | ChemPhysMater |
| spelling | doaj.art-ac78f5fb315048d7a7769c9af3c0b0c42023-10-27T04:24:58ZengKeAi Communications Co., Ltd.ChemPhysMater2772-57152023-10-0124337345One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performancesWenjing Du0Jinbo Zhao1Fenglong Wang2Huan Yang3Ling Chen4Xingyu Yao5Lili Wu6Jiurong Liu7College of Materials Engineering, Henan Key Laboratory of Electronic Ceramics Materials and Application, Henan International Joint Laboratory of Rare Earth Composite Materials, Henan University of Engineering, Zhengzhou 451191, China; Corresponding authors.School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250100, China; Corresponding authors.Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of School of Materials Science and Engineering, Shandong University, Jinan 250061, ChinaDepartment of Chemical Engineering and Safety, Binzhou University, Binzhou 256600, ChinaCollege of Materials Engineering, Henan Key Laboratory of Electronic Ceramics Materials and Application, Henan International Joint Laboratory of Rare Earth Composite Materials, Henan University of Engineering, Zhengzhou 451191, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of School of Materials Science and Engineering, Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of School of Materials Science and Engineering, Shandong University, Jinan 250061, China; Corresponding authors.Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of School of Materials Science and Engineering, Shandong University, Jinan 250061, China; Corresponding authors.In this study we report, for the first time, the synthesis of Co-doped NiO microspheres assembled by two-dimension nanosheets using a facile solvothermal method. The H2S gas-sensing performance of the as-prepared samples was systematically investigated. The result demonstrates that the Co–NiO sensor with Co/Ni molar ratio of 1% (1% Co–NiO) exhibits high response (12.9) and rapid response speed (110 s) to 20×10−6 H2S at 200 °C in comparison with the pure NiO sensor. Moreover, excellent selectivity, repeatability, and stability were achieved. The sensing mechanism illustrates that the superior gas-sensing properties can be attributed to two factors. (1) The hierarchical microspherical construction with an ultrahigh specific surface area of 163.1 m2 g−1 provides adequate active sites for H2S gas adsorption, porous structures, and an interlayer gap that accelerates the diffusion of H2S gas, resulting in improved sensitivity and response speed of the sensor. (2) Co-doping results in a decrease in the particle sizes (ca. 4 nm) and increase in the number of adsorbed ionized oxygen species, which improves sensitivity and selectivity. Therefore, this study provides a facile approach for the synthesis of hierarchical Co–NiO microspheres with enhanced H2S gas-sensing performance.http://www.sciencedirect.com/science/article/pii/S2772571523000207Co-doped NiOGas sensorHierarchical microspheresHydrogen sulfide |
| spellingShingle | Wenjing Du Jinbo Zhao Fenglong Wang Huan Yang Ling Chen Xingyu Yao Lili Wu Jiurong Liu One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances ChemPhysMater Co-doped NiO Gas sensor Hierarchical microspheres Hydrogen sulfide |
| title | One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances |
| title_full | One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances |
| title_fullStr | One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances |
| title_full_unstemmed | One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances |
| title_short | One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances |
| title_sort | one pot solvothermal synthesis of hierarchical co doped nio microspheres with enhanced hydrogen sulfide sensing performances |
| topic | Co-doped NiO Gas sensor Hierarchical microspheres Hydrogen sulfide |
| url | http://www.sciencedirect.com/science/article/pii/S2772571523000207 |
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