Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection
Highly sensitive and selective detection of volatile organic compounds (VOCs) is highly important, and designing a suitable microstructure and constructing heterostructures are two main effective strategies for gas-sensing materials to achieve this goal. In this study, Pt nanoparticle-decorated CoFe...
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| Language: | English |
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Tsinghua University Press
2025-06-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2025.9221092 |
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| author | Yuli Zhao Mingyuan Wang Siwei Liu Xiangzhao Zhang Guiwu Liu Guanjun Qiao |
| author_facet | Yuli Zhao Mingyuan Wang Siwei Liu Xiangzhao Zhang Guiwu Liu Guanjun Qiao |
| author_sort | Yuli Zhao |
| collection | DOAJ |
| description | Highly sensitive and selective detection of volatile organic compounds (VOCs) is highly important, and designing a suitable microstructure and constructing heterostructures are two main effective strategies for gas-sensing materials to achieve this goal. In this study, Pt nanoparticle-decorated CoFe2O4/Co3O4 nanosheets were prepared via a solution method for highly accurate detection of formaldehyde (HCHO), where the CoFe2O4/Co3O4 nanosheets were derived from a two-dimensional Fe‒Co metal-organic framework (MOF). The response (Rg/Ra, where Rg represents the electrical resistance of the gas sensor when exposed to a specific target gas under defined conditions; Ra denotes the baseline resistance of the gas sensor in clean air) of the ternary Pt2/CoFe2O4/Co3O4 composite to 100 ppm HCHO at 280 °C can be calculated as 95.5, and it still exhibits a very high response to low concentrations of HCHO (1.26 to 50 ppb HCHO gas) and an ultralow limit of detection (LOD) of 6 ppb. The ternary composite also presented excellent reproducibility, selectivity, and long-term stability. The first-principles calculations demonstrated that the Pt/CoFe2O4/Co3O4 model presented the most stable structure and the strongest adsorption capacity for HCHO. The high sensitivity of Pt/CoFe2O4/Co3O4 to HCHO can be attributed mainly to the formation of multiple heterojunctions and the catalytic effect of the Pt nanoparticles. This work describes the facile preparation of MOF-derived multi-heterojunction materials and highlights the superior gas-sensing performance to that of VOCs. |
| format | Article |
| id | doaj-art-eef7e6b507514acb937e2b8e230dd15a |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-eef7e6b507514acb937e2b8e230dd15a2025-08-20T03:29:06ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-06-01146922109210.26599/JAC.2025.9221092Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detectionYuli Zhao0Mingyuan Wang1Siwei Liu2Xiangzhao Zhang3Guiwu Liu4Guanjun Qiao5School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, ChinaKey Laboratory for Theory and Technology of Intelligent Agriculture Machinery and Equipment, Jiangsu University, Zhenjiang 212013, ChinaSchool of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, ChinaHighly sensitive and selective detection of volatile organic compounds (VOCs) is highly important, and designing a suitable microstructure and constructing heterostructures are two main effective strategies for gas-sensing materials to achieve this goal. In this study, Pt nanoparticle-decorated CoFe2O4/Co3O4 nanosheets were prepared via a solution method for highly accurate detection of formaldehyde (HCHO), where the CoFe2O4/Co3O4 nanosheets were derived from a two-dimensional Fe‒Co metal-organic framework (MOF). The response (Rg/Ra, where Rg represents the electrical resistance of the gas sensor when exposed to a specific target gas under defined conditions; Ra denotes the baseline resistance of the gas sensor in clean air) of the ternary Pt2/CoFe2O4/Co3O4 composite to 100 ppm HCHO at 280 °C can be calculated as 95.5, and it still exhibits a very high response to low concentrations of HCHO (1.26 to 50 ppb HCHO gas) and an ultralow limit of detection (LOD) of 6 ppb. The ternary composite also presented excellent reproducibility, selectivity, and long-term stability. The first-principles calculations demonstrated that the Pt/CoFe2O4/Co3O4 model presented the most stable structure and the strongest adsorption capacity for HCHO. The high sensitivity of Pt/CoFe2O4/Co3O4 to HCHO can be attributed mainly to the formation of multiple heterojunctions and the catalytic effect of the Pt nanoparticles. This work describes the facile preparation of MOF-derived multi-heterojunction materials and highlights the superior gas-sensing performance to that of VOCs.https://www.sciopen.com/article/10.26599/JAC.2025.9221092pt/cofe2o4/co3o4nanosheetsheterojunctiongas sensing |
| spellingShingle | Yuli Zhao Mingyuan Wang Siwei Liu Xiangzhao Zhang Guiwu Liu Guanjun Qiao Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection Journal of Advanced Ceramics pt/cofe2o4/co3o4 nanosheets heterojunction gas sensing |
| title | Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection |
| title_full | Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection |
| title_fullStr | Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection |
| title_full_unstemmed | Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection |
| title_short | Pt decorated CoFe2O4/Co3O4 nanosheets derived from 2D Fe–Co MOF for enhanced HCHO detection |
| title_sort | pt decorated cofe2o4 co3o4 nanosheets derived from 2d fe co mof for enhanced hcho detection |
| topic | pt/cofe2o4/co3o4 nanosheets heterojunction gas sensing |
| url | https://www.sciopen.com/article/10.26599/JAC.2025.9221092 |
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