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J Colloid Interface Sci

Title:		Carbon functionalized mesoporous silica-based gas sensors for indoor volatile organic compounds
Author(s):		Liu Y; Chen J; Li W; Shen D; Zhao Y; Pal M; Yu H; Tu B; Zhao D;
Address:		"Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, PR China. Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, PR China. Electronic address: botu@fudan.edu.cn. Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, PR China. Electronic address: dyzhao@fudan.edu.cn"
Journal Title:		J Colloid Interface Sci
Year:		2016
Volume:		20160521
Issue:
Page Number:		54 - 63
DOI:		10.1016/j.jcis.2016.05.040
ISSN/ISBN:		1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:		"Indoor organic gaseous pollution is a global health problem, which seriously threats the health and life of human all over the world. Hence, it is important to fabricate new sensing materials with high sensitivity and efficiency for indoor volatile organic compounds. In this study, a series of ordered mesoporous silica-based nanocomposites with uniform carbon coatings on the internal surface of silica mesopore channels were synthesized through a simple template-carbonization strategy. The obtained mesoporous silica-carbon nanocomposites not only possess ordered mesostructures, high surface areas (up to approximately 759m(2)g(-1)), large and tunable pore sizes (2.6-10.2nm), but also have the improved hydrophobicity and anti-interference capability to environmental humidity. The sensing performances of the mesoporous silica-carbon nanocomposites to volatile organic compounds, such as ethylbenzene, methylbenzene, benzene, methanol, acetone, formaldehyde, dichloromethane and tetrahydrofuran, were systematically investigated. The relationships between the sensing performances and their properties, including mesostructures, surface areas, pore sizes, carbon contents and surface hydrophilic/hydrophobic interactions, have been achieved. The mesoporous silica-carbon nanocomposites with hexagonal mesostructure exhibit outstanding performance at room temperature to benzene and acetone with high responses, short response (2-3s) and recovery (16-19s) time, strong anti-interference to environmental humidity, and long-term stability (less than approximately 5% loss of the frequency shifts after 42days). Therefore, the obtained mesoporous silica-carbon nanocomposites have a hopeful prospect in the field of environmental air quality monitoring"
Keywords:		Anti-interference Carbon functional Gas sensors Mesoporous silica Volatile organic compounds (VOCs);
Notes:		"PubMed-not-MEDLINELiu, Yupu Chen, Junchen Li, Wei Shen, Dengke Zhao, Yujuan Pal, Manas Yu, Haijun Tu, Bo Zhao, Dongyuan eng 2016/05/31 J Colloid Interface Sci. 2016 Sep 1; 477:54-63. doi: 10.1016/j.jcis.2016.05.040. Epub 2016 May 21"