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Synthesis of Hierarchical-Porous Fluorinated Metal-Organic Frameworks with Superior Toluene Adsorption Properties.
Wang, Hao; Lu, Shuangchun; Liu, Qingling; Han, Rui; Lu, Xuebin; Song, Chunfeng; Ji, Na; Ma, Degang.
Afiliación
  • Wang H; Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, P.R. China.
  • Lu S; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, P.R. China.
  • Liu Q; Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, P.R. China.
  • Han R; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, P.R. China.
  • Lu X; Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, P.R. China.
  • Song C; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, P.R. China.
  • Ji N; Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, P.R. China.
  • Ma D; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, P.R. China.
ChemSusChem ; 15(16): e202200702, 2022 Aug 19.
Article en En | MEDLINE | ID: mdl-35778818
Constructing metal-organic frameworks (MOFs) with high volatile organic compounds (VOCs) adsorption capacity and excellent water resistance remain challenging. Herein, a monocarboxylic acid-assisted mixed ligands strategy was designed to synthesize a novel fluorinated MOFs, MIL-53 (Al). The monocarboxylic acid promoted crystallization and produced abundant crystal defects, which increased pore volume. Moreover, the competitive coordination between tetrafluoroterephthalic acid and 1,4-dicarboxybenzene was moderated by monocarboxylic modulators, significantly improving the hydrophobicity. The toluene uptake of the optimal sample reached 254.85 mg g-1 under humid conditions, increased by 33.56 % of MIL-53(Al), and the QWet /QDry (the ratio of adsorption quality under wet to adsorption quality under dry) was 0.92, remarkably surpassing that of origin MIL-53 (0.72). The recycle experiment showed superior reusability with no performance degradation after 10 recycle under RH=50 % (relative humidity). The adsorptive kinetic and thermodynamic analysis proves that the adsorption process is controlled by surface mono-layer adsorption and pore diffusion. The fluorine group affects the internal diffusion, which weakens the transfer rate. This strategy opens a new prospect of obtaining hierarchical functional MOFs for meeting the VOCs uptake under the practical application.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemSusChem Asunto de la revista: QUIMICA / TOXICOLOGIA Año: 2022 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemSusChem Asunto de la revista: QUIMICA / TOXICOLOGIA Año: 2022 Tipo del documento: Article Pais de publicación: Alemania