Synthesis and photocatalytic activity of co-doped mesoporous TiO2 on Brij98/CTAB composite surfactant template

Using composite surfactant templates, polyoxyethylene (20) oleyl ether (Brij98) and cetyl trimethyl ammonium bromide (CTAB), as structure-directing agents. N and La co-doped mesoporous TiO2 complex photocatalysts were synthesized successfully The micromorphology of co-doped mesoporous TiO2 samples was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FT-IR), energy-dispersive X-ray spectrometer (EDS) and N-2 adsorption-desorption measurements The results indicated that the complex photocatalyst prepared with a molar ratio of Brij98:CTAB= 1:1 showed a uniform pore size of ca 7 nm and a high specific surface area (S-BET) of 279 0 m(2) g(-1), and exhibited the highest photocatalytic activity for degradation of papermaking wastewater under ultra-violet light irradiation. The chemical oxygen demand (CODc(r)) percent degradation was about 73% in 12h and chroma percent degradation was 100% in 8h (C) 2010 Elsevier Inc All rights reserved