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Issue 38, 2014
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High temperature and water-based evaporation-induced self-assembly approach for facile and rapid synthesis of nanocrystalline mesoporous TiO2

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Abstract

Various appealing applications of mesoporous TiO2 continuously spur research on related mesostructural design as well as innovations in preparation. This paper reports a novel high temperature and water-based evaporation-induced self-assembly (HW-EISA) approach based on a simple ternary templating system (peroxotitanic acid/P123/H2O), enabling the facile and rapid synthesis of nanocrystalline mesoporous TiO2 with unusual structures: high surface areas (140–240 m2 g−1), ultra-large mesopores (20–30 nm)/pore volumes (0.7–1.0 cm3 g−1) and tunable bicrystallinity (anatase plus rutile). The unusual templating and subsequent decomposition behaviors of P123 were newly unveiled to play crucial and multiple roles in inducing self-assembly between peroxotitanic acid and P123 for final meso-TiO2 with ultra-large mesopores/pore volumes during the HW-EISA and helping preserve the integrity of mesostructures during calcination and rendering bicrystallinity in the titania frameworks as well. Other PEO-based nonionic surfactants were also demonstrated to be applicable in producing similar mesostructures. The photocatalytic testing results showed that both high surface areas and the synergistic effects of bicrystallinity of anatase plus rutile are of great significance in enhancing the photocatalytic properties of meso-TiO2.

Graphical abstract: High temperature and water-based evaporation-induced self-assembly approach for facile and rapid synthesis of nanocrystalline mesoporous TiO2

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Publication details

The article was received on 09 Jun 2014, accepted on 30 Jul 2014 and first published on 20 Aug 2014


Article type: Paper
DOI: 10.1039/C4TA02912G
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Citation: J. Mater. Chem. A, 2014,2, 15912-15920
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    High temperature and water-based evaporation-induced self-assembly approach for facile and rapid synthesis of nanocrystalline mesoporous TiO2

    W. Wang, D. Nguyen, H. Long, G. Liu, S. Li, X. Yue and H. Ru, J. Mater. Chem. A, 2014, 2, 15912
    DOI: 10.1039/C4TA02912G

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