Journal Article

Fabrication and Photocatalytic Activity of Single Crystalline TiO2 Hierarchically Structured Microspheres

Qi Kong, Xin Yue, Kunlei Wang, Haisheng Huang, Zhishun Wei, Ying Chang

2023

Overview

Single crystalline anatase TiO2 microspheres with co-exposed 001/101 facets were prepared by a facile one-pot hydrothermal method using NaF as a morphology controlling agent. The influences of the NaF amount on the morphology and also on the photocatalytic activity were investigated systematically. The obtained microspheres possessed better morphology when the concentration of NaF was chosen at 0.1 mol/L, and the experimental results indicated that the crystal structure and morphology played important roles on the photocatalytic activity, based on the experimental results it was found that the photocatalytic degradation efficiency of TiO2 microspheres on Tetracycline hydrochloride could reach 76.4% in 2 h. Finally, a growth mechanism was proposed by investigating the growth process, i.e., a synergistic effect of F ions modified Ostwald ripening and oriented attachment.

• Publisher: MDPI AG
• Subject: Anatase / Catalysts / Catalytic activity / Chemical reactions / Crystal structure / Hydrothermal crystal growth / Microspheres / Morphology / Nanoparticles / Ostwald ripening / Particle size / Photocatalysis / Photodegradation / Single crystals / Synergistic effect / Titanium dioxide / titanium dioxide; microsphere; hierarchical structure; mechanism; photocatalysis