Core-shell structured TiO2 as highly efficient visible light photocatalyst for dye degradation

Authors

Haiyang Hu, Shanghai Jiao Tong University
Yan Lin, Shanghai Jiao Tong University
Yun Hang Hu, Michigan Technological UniversityFollow

Document Type

Article

Publication Date

2-1-2020

Department

Department of Materials Science and Engineering

Abstract

TiO₂ is one of the most important photocatalysts, but it is inefficient for visible light photocatalysis due to its large band gap. Herein, the unique core-shell structured TiO₂ photocatalyst was synthesized by a one-step hydrogen treatment at temperature of 400–600 °C. The novel catalyst exhibited excellent performance for visible light photocatalytic dye degradation at room temperature. Even under weak visible light (40 mW cm⁻²) illumination, its degradation efficiency for methylene blue dye was 400% higher than that of pristine TiO₂. Such a large enhancement can be attributed to the stable Ti³⁺ centers inside the core for visible light photocatalytic activity and the disordered shell for dye adsorption.

Publication Title

Catalysis Today

Recommended Citation

Hu, H., Lin, Y., & Hu, Y. H. (2020). Core-shell structured TiO2 as highly efficient visible light photocatalyst for dye degradation. Catalysis Today, 341, 90-95. http://doi.org/10.1016/j.cattod.2019.01.077
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/1388