The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

Abstract

In order to improve the photocatalytic property of a tungsten trioxide (WO 3 )/titanium dioxide (TiO 2 ) composite, a novel structure -that is, a hollow microsphere with a mesoporous wall -was fabricated. The relations between the interior characteristics and the optical, photoelectric and photocatalytic properties of the samples were investigated. The results show that the tungsten (W)/titanium (Ti) ratio and the crystallinity and diameter of the crystallite of the sample determine its optical property. The photoelectric conversion property of the sample is related to its electron ability transfer and optical property. The photocatalytic property of the sample is relevant to its optical property and interior structures, in particular the particle microstructure of the sample, the dispersion of titanium dioxide and tungsten trioxide crystallites and their contact relationship at the mesoscale. In terms of application, it is the hollow microsphere with a mesoporous wall that takes a key role. These set a connection between the property and mesostructure of the sample, which facilitates the adjustment of the property of tungsten trioxide/titanium dioxide composite. Notation

Noble Metal Modified TiO2 Hierarchically Structured Microspheres with Enhanced Photocatalytic Activity

“…However, the co-existence of {001} and {101} facets of anatase TiO2 to form a "surface heterojunction" is beneficial to enhance its intrinsic photocatalytic performance and was proposed by Yu [10] et al in recent years. In addition, other effective strategies were also employed for improving the photocatalytic performance of TiO2, such as ion doping [11][12][13][14][15][16], semiconductor coupling [17][18][19][20][21], noble metal deposition [22][23][24][25][26], etc. Herein, we focus on improving the photocatalytic performance of TiO2 microspheres through a combined strategy by exposing its {001}/{101} facets and depositing the noble metals.…”