Carbon-Modified TiO_2 Visible Light Photocatalyst Prepared Using Phenolic Resin as Carbon Source

A carbon-modified titanium dioxide photocatalyst,PF/TiO2,was prepared by calcining self-prepared phenolic resin (PF) and TiO2 in N2 atmosphere.The as-prepared PF/TiO2 samples were characterized by X-ray diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy (XPS),and UV-Vis diffuse reflectance spectroscopy.PF/TiO2 has similar crystal phase and morphology to raw TiO2 and has significant absorption in the visible region.The XPS observed the presence of Cn,C-OH(C-O-C),and C=O(COO) species,which confirms that there is graphite carbonaceous matter on the surface of PF/TiO2.During the calcination,the phenolic resin on the surface of PF/TiO2 has been carbonized.The photocatalytic performance of PF/TiO2 under visible light was evaluated by the degradation of methyl orange.The photocatalytic activity of PF/TiO2 is greatly higher than that of bare TiO2.The PF dosage for preparing PF/TiO2 with the highest visible light photocatalytic activity is 2%,corresponding to a carbonaceous matter content of 1.33% in PF/TiO2.