Binary-phase TiO2 modified Bi2MoO6 crystal for effective removal of antibiotics under visible light illumination. (April 2019)

• Record Type: Journal Article
• Authors: Liu, Zhen; Tian, Jian; Zeng, Debing; Yu, Changlin; Huang, Weiya; Yang, Kai; Liu, Xingqiang; Liu, Hong
• Is Part Of: Materials research bulletin. Volume 112(2019)
• Page Start: 336
• Page End: 345
• Publication Date: 2019-04
• Subjects: Binary-phase TiO2 -- Bi2MoO6 -- Antibiotics -- Photocatalytic degradation -- Mechanism; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2019.01.002
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Coupling of binary-phase TiO2 decreases particle size and increases specific surface area. At TiO2 /Bi2 MoO6 heterojunction interface high separation of photocarriers was obtained. TiO2 /Bi2 MoO6 exhibited a superior photocatalytic performance for different antibiotics degradation. Abstract: A series of binary-phase TiO2 modified Bi2 MoO6 nanocrystals have been prepared via a solvothermal-calcination process. Trace TiO2 modification can effectively enhance the visible light catalytic activity of Bi2 MoO6 to remove the antibiotics in aqueous solution. The obtained TiO2 /Bi2 MoO6 composites were investigated by some physicochemical techniques like XRD, N2 adsorption, SEM, TEM, UV–vis DRS, Raman, XPS, PL and Photo-electrochemical measurement. The presence of TiO2 nanoparticles (NPs) influenced the crystal growth of Bi2 MoO6, decreasing the crystal size of Bi2 MoO6 and effectively promoting its specific surface area. Moreover, the conduction band of TiO2 can serve as the electron transfer platform, which largely boosts the effective separation of photocarriers at TiO2 /Bi2 MoO6 heterojunction interface. With optimal TiO2 content (0.41 wt%), TiO2 /Bi2 MoO6 exhibited the best photocatalytic performance for different antibiotics degradation, e.g. ciprofloxacin, tetracycline and oxytetracyline hydrochloride under visible light irradiation. Moreover, the mechanism for enhanced photocatalytic performance in ciprofloxacin degradation was illuminated.