title: Constructing Three-Dimensional Mesoporous Bouquet-Posy-like TiO2Superstructures with Radially Oriented Mesochannels and Single-Crystal Walls.
abstract: Constructing three-dimensional (3-D) hierarchical mesostructures with unique morphology, pore orientation, single-crystal nature, and functionality remains a great challenge in materials science. Here, we report a confined microemulsion self-assembly approach to synthesize an unprecedented type of 3-D highly ordered mesoporous TiO2superstructure (Level-1), which consists of 1 spherical core and 12 symmetric satellite hemispheres epitaxially growing out of the core vertices. A more complex and asymmetric TiO2superstructure (Level-2) with 13 spherical cores and up to 44 symmetric satellite hemispheres can also be well manipulated by increasing the size or content of impregnated TiO2precursor emulsion droplets. The obtained 3-D mesoporous TiO2superstructures have well-defined bouquet-posy-like topologies, oriented hexagonal mesochannels, high accessible surface area (134-148 m2/g), large pore volume (0.48-0.51 cm3/g), and well single-crystalline anatase walls with dominant (001) active facets. More interestingly, all cylindrical mesopore channels are highly interconnected and radially distributed within the whole superstructures, and all TiO2nanocrystal building blocks are oriented grown into a single-crystal anatase wall, making them ideal candidates for various applications ranging from catalysis to optoelectronics. As expected, the bouquet-posy-like mesoporous TiO2superstructure supported catalysts show excellent catalytic activity (≥99.7%) and selectivity (≥96%) in cis-semihydrogenation of various alkynes, exceeding that of commercial TiO2(P25) supported catalyst by a factor of 10. No decay in the activity was observed for 25 cycles, revealing a high stability of the mesoporous TiO2superstructure supported catalyst.
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.|Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Lan
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Shushuang
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Biao
authors.initials: B
authors.lastname: Kong
authors.affiliation: School of Physical Science and Technology, ShanghaiTech University , Shanghai 201210, China.
authors.forename: Geng
authors.initials: G
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Ruicong
authors.initials: R
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Haili
authors.initials: H
authors.lastname: He
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Ling
authors.affiliation: Department of Chemistry, College of Science, King Saud University , Riyadh 11451, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Al-Enizi
authors.affiliation: Materials Science and Technology Program, College of Arts and Sciences, Qatar University , P.O. Box 2713, Doha, Qatar.
authors.forename: Ahmed A
authors.identifier: 0000-0002-7291-5723
authors.initials: AA
authors.lastname: Elzatahry
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Yong
authors.identifier: 0000-0002-8333-0181
authors.initials: Y
authors.lastname: Cao
authors.affiliation: School of Physical Science and Technology, ShanghaiTech University , Shanghai 201210, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University , Shanghai 200433, China.
authors.forename: Dongyuan
authors.identifier: 0000-0001-8440-6902
authors.initials: D
authors.lastname: Zhao