Hydrothermal synthesis of nanostructures Bi12TiO20 and their photocatalytic activity on acid orange 7 under visible light.
Bismuth titanate (Bi(12)TiO(20)) nanostructures with different morphologies were synthesized hydrothermally using Bi(NO(3))(3) and Ti(SO(4))(2) in the presence of polyethylene glycol (PEG). X-ray diffraction (XRD) proved that the samples were in pure cubic phase. UV-visible diffuse reflection spectra showed the band gap of Bi(12)TiO(20) is about 2.7eV. Brunauer-Emmett-Teller (BET) analysis proved that the Bi(12)TiO(20) samples have higher surface areas than samples prepared by methods reported previously. Photocatalytic degradation of acid orange 7 (AO7) under visible light illumination was used to evaluate the photocatalytic ability of samples. The photocatalytic results showed Bi(12)TiO(20) could degrade AO7 very efficiently and had higher photocatalytic activity than traditional N-doped TiO(2). In addition, we have also discussed factors that have major effect on reaction efficiency. BET surface area played the most important role in the photocatalytic degradation of AO7. The crystallinity of the samples is another important factor which can also influence photocatalysis results.
Zhu
Xiangqi
X
Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, PR China.
Zhang
Jinlong
J
Chen
Feng
F
D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D008027:Light; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D055668:Photochemical Processes; D013053:Spectrophotometry; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D001391:Azo Compounds; D001557:Benzenesulfonates; C550183:bismuth titanate; D014025:Titanium; C014722:2-naphthol orange; D001729:Bismuth