Journal
RSC ADVANCES
Volume 6, Issue 10, Pages 7829-7837Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra25337c
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Funding
- National Natural Science Foundation of China [21473161, 21271155]
- Zhejiang Provincial Top Key Academic Discipline of Chemical Engineering and Technology
- Alexander von Humboldt Foundation
- Zhejiang SCI-TECH University
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Spindle-shaped nanoporous anatase TiO2 mesocrystals with exposed active {101} facets have been successfully prepared through a hydrothermal method with tetrabutyl titanate as the precursor. By a deposition-precipitation process, highly dispersed Au nanoparticles loaded on spindle-shaped mesoTiO(2) exposed {101} facets, denoted as Aux/mesoTiO(2), were firstly fabricated to establish close Schottky junctions to improve the visible light activity and the stability of Au on the catalyst surface. The photodegradation of methylene blue (MB) over Aux/mesoTiO(2) was systematically investigated. The exposed active {101} facets together with the loaded Au nanoparticles dramatically enhanced the visible light photocatalytic activity of TiO2. The synergistic effect of the high intrinsic single-crystal-like nature of the anatase phase, the stability of gold and the strong interaction between Au and mesoTiO(2) result in extraordinary photocatalytic stability of the catalyst. The detailed e(-) and h(+) separation dynamics for the visible-light and UV-vis induced catalytic mechanisms were discussed.
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