title: Hierarchical Mesoporous Metal-Organic Frameworks for Enhanced CO2 Capture.
abstract: Hierarchical porous materials are promising for catalyst, separation and sorption applications. A ligand-assisted etching process is developed for template-free synthesis of hierarchical mesoporous MOFs as single crystals and well-intergrown membranes at 40 °C. At 223 K, the hierarchical porous structures significantly improve the CO2 capture capacity of HKUST-1 by more than 44 % at pressures up to 20 kPa and 13 % at 100 kPa. Even at 323 K, the enhancement of CO2 uptake is above 25 % at pressures up to 20 kPa and 7 % at 100 kPa. The mesoporous structures not only enhance the CO2 uptake capacity but also improve the diffusion and mass transportation of CO2 . Similarly, well-intergrown mesoporous HKUST-1 membranes are synthesized, which hold the potential for film-like porous devices. Mesoporous MOF-5 crystals are also obtained by a similar ligand-assisted etching process. This may provide a facile way to prepare hierarchical porous MOF single crystals and membranes for wide-ranging applications.
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Yiyin
authors.initials: Y
authors.lastname: Mao
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Danke
authors.initials: D
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Pan
authors.initials: P
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Yi
authors.initials: Y
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Ying
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625.
authors.forename: Wen
authors.initials: W
authors.lastname: Ying
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027 (P. R. China), Fax: (+86) 571-87952625. pengxinsheng@zju.edu.cn.|Cyrus Tang Center for Sensor Materials and Applications, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 (P. R. China). pengxinsheng@zju.edu.cn.
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Peng
keywords: carbon dioxide capture; mesoporous materials; metal-organic frameworks; template-free synthesis