APPLICATION OF NANOCRYSTALLINE ANATASE TiO_2 THIN FILMS SUPPORTED ON GLASS IN HETEROGENEOUS PHOTOCATALYSIS

摘要

The present work reports the results from the photocatalytic decomposition of gelatine factories wastewater by using anatase TiO_2 particles prepared onto surface of glass materials. An experimental method adapted from emulsion templating approach associated with sol-gel process was employed to prepare and for fixing the catalyst. The resulting material was characterized by X-ray diffraction (XRD), Raman spectroscopy, Scanning electronic microscopy (SEM), and X Ray fluorescence. The developed material was applied in gelatine factories wastewater remediation by photocatalytic process assisted by TiO_2 and UV irradiation. The efficiency for substrate mineralization was analysed by the total organic carbon (TOC) reduction in the effluent. Experiments were conducted in a cylindrical Pyrex reactor of 250 mL capacity. A 125 w Phillips medium pressure mercury lamp was used as light source (113.4 Jm~2s~(-1)). The toxicity assay was evaluated and the TOC reduction reached values around 90%.