화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.15, No.4, 476-482, July, 2009
DOI10.1016/j.jiec.2009.01.004  Export Citation
Development of a novel method to prepare Fe- and Al-doped TiO2 from wastewater
H.K. Shon1, D.L. Cho2, S.H. Na2, J.B. Kim2, 3, H.-J. Park4, and J.-H. Kim2, 3, †
  • 1Faculty of Engineering and IT, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), P.O. Box 123, Broadway, Sydney, NSW 2007, Australia
  • 2School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea
  • 3Photo & Environmental Technology Co. Ltd.,, Gwangju 500-460, Republic of Korea
  • 4Photo & Environmental Technology Co. Ltd., Gwangju 500-460, Republic of Korea
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A simple and novel method to synthesize iron and aluminium-doped titanium dioxide (TiO2) was investigated. Titanium tetrachloride (TiCl4) was used as a coagulant to remove organic matter from wastewater. The settled floc (sludge) was dewatered and incinerated at 600 ℃ after TiCl4 flocculation. The resultant by-product from the waste sludge was valuable TiO2. TiCl4 coagulant was added with FeCl3 and Al2(SO4)3 coagulants to dope iron and aluminium on TiO2 in a flocculation process. The effect of iron and aluminium on TiO2 was investigated in terms of scanning electron microscopy/energy dispersive Xray (SEM/EDX), X-ray diffraction (XRD), optical absorbance and photocatalytic activity. The majority of Fe/TiO2 and Al/TiO2 particleswere found to be less than 1 μm size formed by 0.1 μm agglomerates using SEM analysis. Fe/TiO2 included Ti, O, C, P and Fe elements and Al/TiO2 consisted of Ti, O, C, P and Al elements as confirmed by EDX results. Remaining organic carbon from the settled organic matter was the source of C atom in TiO2 whereas the P atom in TiO2 came from phosphorus nutrient present in wastewater. The majority of acetaldehyde with Fe/TiO2 and Al/TiO2 was significantly removed under UV irradiation within 60 min. However, at higher iron concentration, acetaldehyde removal decreased by almost 50%. Under visible light irradiation, the photo-decomposition of acetaldehyde using the Fe/TiO2 and Al/TiO2 was marginal.
Keywords:Titanium oxide;Iron doping;Aluminium doping;Wastewater;Flocculation
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