Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature
Two-dimensional (2D) or ultrathin metal sulfides have been emerging candidates in developing high-performance gas sensors given their physisorption-dominated interaction with target gas molecules. Their oxysulfide derivatives, as intermediates between oxides and sulfides, were recently demonstrated...
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MDPI AG
2022-09-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/9/372 |
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| author | Nam Ha Kai Xu Yinfen Cheng Rui Ou Qijie Ma Yihong Hu Vien Trinh Guanghui Ren Hao Yu Lei Zhang Xiang Liu Jiaru Zhang Zhong Li Jian Zhen Ou |
| author_facet | Nam Ha Kai Xu Yinfen Cheng Rui Ou Qijie Ma Yihong Hu Vien Trinh Guanghui Ren Hao Yu Lei Zhang Xiang Liu Jiaru Zhang Zhong Li Jian Zhen Ou |
| author_sort | Nam Ha |
| collection | DOAJ |
| description | Two-dimensional (2D) or ultrathin metal sulfides have been emerging candidates in developing high-performance gas sensors given their physisorption-dominated interaction with target gas molecules. Their oxysulfide derivatives, as intermediates between oxides and sulfides, were recently demonstrated to have fully reversible responses at room temperature and long-term device stability. In this work, we explored the micro-scale self-assembly of ultrathin nickel oxysulfide through the calcination of nickel sulfide in a controllable air environment. The thermal treatment resulted in the replacement of most S atoms in the Ni-S frameworks by O atoms, leading to the crystal phase transition from original hexagonal to orthorhombic coordination. In addition, the corresponding bandgap was slightly expanded by ~0.15 eV compared to that of pure nickel sulfide. Nickel oxysulfide exhibited a fully reversible response towards H<sub>2</sub> at room temperature for concentrations ranging from 0.25% and 1%, without the implementation of external stimuli such as light excitation and voltage biasing. The maximum response factor of ~3.24% was obtained at 1% H<sub>2</sub>, which is at least one order larger than those of common industrial gases including CH<sub>4</sub>, CO<sub>2</sub>, and NO<sub>2</sub>. Such an impressive response was also highly stable for at least four consecutive cycles. This work further demonstrates the great potential of metal oxysulfides in room-temperature gas sensing. |
| first_indexed | 2024-03-10T00:24:57Z |
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| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T00:24:57Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
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| series | Chemosensors |
| spelling | doaj.art-a29472678cf94d89867ea8dd185e74cd2023-11-23T15:36:01ZengMDPI AGChemosensors2227-90402022-09-0110937210.3390/chemosensors10090372Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room TemperatureNam Ha0Kai Xu1Yinfen Cheng2Rui Ou3Qijie Ma4Yihong Hu5Vien Trinh6Guanghui Ren7Hao Yu8Lei Zhang9Xiang Liu10Jiaru Zhang11Zhong Li12Jian Zhen Ou13School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaCollege of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Deyang 618307, ChinaCollege of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Deyang 618307, ChinaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaTwo-dimensional (2D) or ultrathin metal sulfides have been emerging candidates in developing high-performance gas sensors given their physisorption-dominated interaction with target gas molecules. Their oxysulfide derivatives, as intermediates between oxides and sulfides, were recently demonstrated to have fully reversible responses at room temperature and long-term device stability. In this work, we explored the micro-scale self-assembly of ultrathin nickel oxysulfide through the calcination of nickel sulfide in a controllable air environment. The thermal treatment resulted in the replacement of most S atoms in the Ni-S frameworks by O atoms, leading to the crystal phase transition from original hexagonal to orthorhombic coordination. In addition, the corresponding bandgap was slightly expanded by ~0.15 eV compared to that of pure nickel sulfide. Nickel oxysulfide exhibited a fully reversible response towards H<sub>2</sub> at room temperature for concentrations ranging from 0.25% and 1%, without the implementation of external stimuli such as light excitation and voltage biasing. The maximum response factor of ~3.24% was obtained at 1% H<sub>2</sub>, which is at least one order larger than those of common industrial gases including CH<sub>4</sub>, CO<sub>2</sub>, and NO<sub>2</sub>. Such an impressive response was also highly stable for at least four consecutive cycles. This work further demonstrates the great potential of metal oxysulfides in room-temperature gas sensing.https://www.mdpi.com/2227-9040/10/9/372nickel oxysulfideroom temperature gas sensingH<sub>2</sub> sensorphysisorption |
| spellingShingle | Nam Ha Kai Xu Yinfen Cheng Rui Ou Qijie Ma Yihong Hu Vien Trinh Guanghui Ren Hao Yu Lei Zhang Xiang Liu Jiaru Zhang Zhong Li Jian Zhen Ou Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature Chemosensors nickel oxysulfide room temperature gas sensing H<sub>2</sub> sensor physisorption |
| title | Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature |
| title_full | Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature |
| title_fullStr | Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature |
| title_full_unstemmed | Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature |
| title_short | Self-Assembly of Ultrathin Nickel Oxysulfide for Reversible Gas Sensing at Room Temperature |
| title_sort | self assembly of ultrathin nickel oxysulfide for reversible gas sensing at room temperature |
| topic | nickel oxysulfide room temperature gas sensing H<sub>2</sub> sensor physisorption |
| url | https://www.mdpi.com/2227-9040/10/9/372 |
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