Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438606 | Ceramics International | 2017 | 21 Pages |
Abstract
The core-shell SrTiO3/TiO2 heterostructure was obtained via a combined hydrothermal route and calcination treatment using amorphous spherical TiO2 as both template and reactant. Adjusting the hydrothermal environments can control the morphology of the post-calcined sample when it is hydrothermally treated at 180 °C/3 h and 200 °C/6 h, respectively. Following the heat treatment at 700 °C/4 h, the obtained powder illustrates the core-shell heterostructure with a hierarchical surface, and the diameter of the microsphere is about 700 nm. This synthesizing route facilitates the formation of a concentration gradient of SrTiO3 and TiO2, and subsequently constructs a gradient energy level, which helps the samples exhibited an excellent de-colorize activity over the methylene blue. The possible formation mechanism of core-shell SrTiO3/TiO2 heterostructures was proposed to guide the further improvement of their photocatalytic activity.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Wei Zhao, Nianqi Liu, Hongxing Wang, Lihao Mao,