Preparation of iron-doped titania from flocculated sludge with iron-titanium composite coagulant
- Publication Type:
- Journal Article
- Journal of Nanoscience and Nanotechnology, 2013, 13 (6), pp. 4106 - 4109
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The main drawback of flocculation process with dye wastewater is the large amount of unrecy-clable sludge which needs disposal. A novel process using Ti-salt flocculation to purify wastewater was developed to produced sludge that can be calcined to produce titania. In this study, irondoped TiO 2 nanomaterial was successfully produced from sludge obtained by the flocculation of dye wastewater with a composite floculant including TiCl 4 and FeSO 4 . The titania was characterised using scanning electron microscopy (SEM/EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), and the photodecomposition of acetaldehyde. The XDR results showed that the anatase and rutile structures were found after sludge calcination at 550 °C and 640 °C respectively. The elemental analyses were carried out using EDX. The rutile titania sample consisted of Ti (35.7 wt.%), Fe (14.7 wt.%), O (42.3 wt.%), P (2.6 wt.%) and Ca (4.7 wt.%). The photocatalytic activity was monitored for the photodecomposition of gas acetaldehyde. Iron-doped titania seems to play an important role in increasing the photocatalytic activity under UV light irradiation. Copyright © 2013 American Scientific Publishers All rights reserved.
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