Catalytic activity of mesoporous TiO_(2-x)N_x photocatalysts for the decomposition of methyl orange under solar simulated light

摘要

Using Tween 80 as pore-directing agent,mesoporous TiO_(2-x)N_x was prepared via the hydrolysis of TTIP(titanium tetraisopropoxide)in a mixed aqueous solution of isopropanol and acetic acid in the presence of urea.The resulting mesoporous TiO_(2-x)N_x was characterized by XRD,N2 adsorption-desorption isotherms,TEM,UV-vis diffuse reflectance spectra and EDS.TEM and N2 adsorption-desorption isotherms showed that the TiO_(2-x)N_x has a uniform mesoporous structure.UV-vis spectra revealed that the nitrogen doping caused the absorption edge of TiO_(2-x)N_x to shift to the visible region.10%N-TiO2 exhibited the highest photocatalytic activity for degradation of MO aqueous solution under solar simulated light irradiation.