O3/UV/TiO2 was used to effectively decompose humic acids (HAs) in drinking water. A series of Al-doped, Fe-doped, Zn-doped and co-doped TiO2 nanotubes were successfully synthesized by a hydrothermal method. According to the characterization of ion-doped TiO2 nanotubes, Al3+ and Fe3+ ions occupied substitutional positions in the crystal lattice, and Zn2+ ions were partially dispersed in the bulk of the TiO2 nanotubes, with ZnO formed on the surface of the TiO2. The calcination temperature and doping concentration could affect the anatase phase weight fractions, average crystallite sizes, Brunauer–Emmett–Teller (BET) surface area, bandgap energy, and photocatalytic activity of the catalysts. For single ion-doped TiO2 nanotubes, the best photocatalytic activities were achieved when the ion-doping amount was 1.0%, and the optimal calcination temperatures for Al-, Fe- or Zn-doped TiO2 were 600°C, 550°C and 550°C, respectively. The highest HA removal efficiency of 80.1% was achieved in the presence of 550°C calcined, 1.0% co-doped TiO2 nanotubes with an Fe:Zn ratio of 1:1 (atomic percent), with second-order rate constant of 0.0394 L/(min·mg). The addition of a third ion had little effect on the photocatalytic activity. The pollutants in filter influent from No. 9 waterworks in Beijing could be efficiently removed, with UV254 and total organic carbon (TOC) removal efficiencies of 57.2% and 44.7%, respectively.
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Research Article|
September 02 2015
Effect of ion (Al, Fe and Zn) co-doped TiO2 nanotubes on photocatalytic degradation of humic acids under UV/ozonation for drinking water purification Available to Purchase
Rongfang Yuan;
Rongfang Yuan
1Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 100083, China and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 100083, China
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Beihai Zhou
1Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 100083, China and Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 100083, China
E-mail: [email protected]
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Water Supply (2016) 16 (1): 237–244.
Article history
Received:
March 24 2015
Accepted:
August 17 2015
Citation
Rongfang Yuan, Beihai Zhou; Effect of ion (Al, Fe and Zn) co-doped TiO2 nanotubes on photocatalytic degradation of humic acids under UV/ozonation for drinking water purification. Water Supply 1 February 2016; 16 (1): 237–244. doi: https://doi.org/10.2166/ws.2015.130
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