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J Hazard Mater

Title:		Rational shape control of porous Co(3)O(4) assemblies derived from MOF and their structural effects on n-butanol sensing
Author(s):		Wang M; Shen Z; Zhao X; Duanmu F; Yu H; Ji H;
Address:		"Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China. Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China. Electronic address: shenzhurui@tju.edu.cn. Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, PR China. Electronic address: jihuiming@tju.edu.cn"
Journal Title:		J Hazard Mater
Year:		2019
Volume:		20190226
Issue:
Page Number:		352 - 361
DOI:		10.1016/j.jhazmat.2019.02.098
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Porous metal oxides are promising materials for VOCs (volatile organic compounds) chemical sensors, because they have large specific surface areas and enough internal space for the fast gas diffusion. Recently, metal-organic framework (MOF) materials with varied shapes and sizes have been regarded as good templates for preparing porous metal oxides. Herein, four kinds of Co-MOFs were prepared by altering the ratios of Co(2+) ions and 2-methylimidazole at room temperature, which exhibited well-controlled shapes. Then, corresponding porous Co(3)O(4) assembled from nanoparticles was acquired by heating Co-MOFs, and showed a good sensing performance for n-butanol, with a response up to 21.0 toward 100 ppm n-butanol. Moreover, it is found that the shape and the size of Co(3)O(4) assemblies can significantly influence their sensing performances. For porous Co(3)O(4) assemblies, when the nanoparticles are small enough ( 10 nm), a porous structure with a larger proportion of the nanoparticles close to its surface tends to show a better gas-sensing performance. The findings can be used in the design of gas-sensing materials in the future"
Keywords:		Co(3)O(4) Gas sensing Porous materials Zif-67 n-Butanol;
Notes:		"PubMed-not-MEDLINEWang, Mingjing Shen, Zhurui Zhao, Xiaodong Duanmu, Fanpeng Yu, Huijun Ji, Huiming eng Netherlands 2019/03/12 J Hazard Mater. 2019 Jun 5; 371:352-361. doi: 10.1016/j.jhazmat.2019.02.098. Epub 2019 Feb 26"