Mesoporous Spherical TiO₂ with Outstanding Photocatalysis under Visible Light

Abstract

In the paper, mesoporous spherical TiO 2 was synthesized using Ti(SO 4 ) 2 and TiCl 3 as raw materials through one step hydrothermal and calcination method. Good dispersibility and high photocatalytic performance could be obtained without adding any organic dispersant. The preparation process of TiO 2 was simple and high efficient. The grain sizes were 29.0 nm, and the specific surfaces were 99.201 m 2 /g. The photocatalytic efficiency of the prepared samples degrading methyl orange was 1.85 times higher than that of the conventional P25 under visible light. In addition, the reaction mechanism of mesoporous spherical TiO 2 based on experiments was explained.[a] Dr.

Progress on the nanoscale spherical TiO2 photocatalysts: Mechanisms, synthesis and degradation applications

“…There are many types of solid nanoscale spherical TiO 2 synthesis methods, among which the hydrothermal method and Sol–gel method are the main preparation methods with the advantages of controllable and uniform particle size. Li [ 15 ] et al. used Ti(SO 4 ) 2 and TiCl 3 as titanium sources to synthesize spherical TiO 2 by one‐step hydrothermal method.…”

“…Among various semiconductors, titanium dioxide [ 10 ] (TiO 2 ) due to its strong oxidation, [ 11 ] high chemical stability, [ 12 ] nontoxicity, [ 13 ] low cost, [ 14 ] high photocatalytic activity [ 15 ] and resistance to corrosion, has been widely used in PCO degradation of pollutants. [ 16,17 ]…”