Modification of carbon-coated TiO2 by iron to increase adsorptivity and photoactivity for phenol

• Published in: Chemosphere (Oxford) 2005-07, Vol.60 (4), p.477-484
• Main Authors: TRYBA, B, TOYODA, M, MORAWSKI, A. W, INAGAKI, M
• Format: Article
• Language: English
• Subjects: Adsorption; Applied sciences; Biological and physicochemical phenomena; Carbon - chemistry; Coloring Agents - chemistry; Disinfectants - chemistry; Exact sciences and technology; General purification processes; Natural water pollution; Phenol - chemistry; Photochemistry; Pollution; Titanium - chemistry; Wastewaters; Water Purification - methods; Water treatment and pollution
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2005.01.031

Carbon-coated TiO(2) modified by iron, were prepared from TiO(2) of anatase structure and PET modified by FeC(2)O(4). Catalysts were prepared by mixing powders of TiO(2) and modified PET and heating at different temperatures, from 400 to 800 degrees C under flow of Ar gas. High adsorption of phenol was observed on the catalyst heated at 400 degrees C, confirmed by FT-IR analysis. On this catalyst, fast rate of phenol decomposition was achieved by addition of small amount of H(2)O(2) to the reaction mixture. Phenol decomposition proceeded mainly through the direct oxidation of phenol species adsorbed on the catalyst surface due to the photo-Fenton reaction. Iron-modified carbon-coated TiO(2) catalysts heated at 500-800 degrees C showed almost no phenol adsorption or oxidation.