| Title: | MOF-Derived Mesoporous and Hierarchical Hollow-Structured In(2)O(3)-NiO Composites for Enhanced Triethylamine Sensing |
| Author(s): | Yu Q; Jin R; Zhao L; Wang T; Liu F; Yan X; Wang C; Sun P; Lu G; |
| Address: | "State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China" |
| DOI: | 10.1021/acssensors.1c01374 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "It remains a challenge to design and fabricate high-performance gas sensors using metal-organic framework (MOF)-derived metal oxide semiconductors (MOS) as sensing materials due to the structural damage during the annealing process. In this study, the mesoporous In(2)O(3)-NiO hollow spheres consisting of nanosheets were prepared via a solvothermal reaction and subsequent cation exchange. More importantly, the transformation of Ni-MOF into In/Ni-MOF through exchanging the Ni(2+) ion with In(3+) ion can prevent the destruction of the porous reticular skeleton and hierarchical structure of Ni-MOF during calcination. Thus, the mesoporous In(2)O(3)-NiO hollow composites possess high porosity and large specific surface area (55.5 m(2) g(-1)), which can produce sufficient permeability pathways for volatile organic compound (VOCs) molecules, maximize the active sites, and enhance the capacity of VOC capture. The mesoporous In(2)O(3)-NiO-based sensors exhibit enhanced triethylamine (TEA) sensing performance (S = 33.9-100 ppm) with distinct selectivity, good long-term stability, and lower detection limit (500 ppb) at 200 degrees C. These results can be attributed to the mesoporous hollow hierarchical structure and p-n junction of In(2)O(3)-NiO. The preparation concept mentioned in this work may provide a versatile platform applicable to various mesoporous composite sensing material-based hollow structures" |
| Keywords: | Ethylamines *Metal-Organic Frameworks In2O3-NiO Mof gas sensor mesoporous hollow structure triethylamine sensing; |
| Notes: | "MedlineYu, Qi Jin, Rongrong Zhao, Liupeng Wang, Tianshuang Liu, Fangmeng Yan, Xu Wang, Chenguang Sun, Peng Lu, Geyu eng Research Support, Non-U.S. Gov't 2021/09/03 ACS Sens. 2021 Sep 24; 6(9):3451-3461. doi: 10.1021/acssensors.1c01374. Epub 2021 Sep 2" |
