Hybrid BiOBr-TiO2 nanocomposites with high visible light photocatalytic activity for water treatment.
Novel highly active visible light photocatalysts BiOBr-TiO2 nanocomposites were prepared by a facile one-pot solvothermal approach. Series of characterizations verified that the BiOBr nanoscale crystals are highly dispersed in amorphous TiO2 to form the hybrid mesoporous structure. The material shows excellent photocatalytic performance towards photodegradation of Rhodamine B under visible light irradiation. The content ratio between TiO2 and BiOBr plays a key role in the microstructure of the nanocomposites, so as to result in distinguished photocatalytic activity. The sample with a molar ratio of 10 between TiO2 and BiOBr shows the optimum performance. The high photocatalytic activity of BiOBr-TiO2 nanocomposites under visible light could be ascribed to the large surface area, opened mesoporous structure, appropriate band-gap, as well as synergistic effect between TiO2 and BiOBr. Besides, the BiOBr-TiO2 composites render a facile separation due to the three-dimensional superstructure. The BiOBr-TiO2 photocatalyst is very promising for water purification as well as other environmental applications.
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; University of the Chinese Academy of Sciences, Beijing 100039, China.
Xian-Xian
XX
Wei
Haitao
H
Cui
Shaoqing
S
Guo
Liangfu
L
Zhao
Wen
W
Li
D000327:Adsorption; D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D003460:Crystallization; D052918:Environmental Restoration and Remediation; D008027:Light; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D010782:Photolysis; D011312:Pressure; D012235:Rhodamines / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
D012235:Rhodamines; C009495:titanium dioxide; D014025:Titanium; C029773:rhodamine B; C542279:bismuth oxybromide; D010100:Oxygen; D001729:Bismuth
BiOBr; Hybrid; Nanocomposite; Photocatalysis; TiO(2); Water treatment