Co-precipitation synthesis of ZnO–TiO2 nanostructure composites for arsenic photodegradation from industrial wastewater

Original Paper
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Abstract

In present work, controlled TiO2–ZnO ratio nanostructure composite powders synthesized via co-precipitation method from zinc acetate and titanium tetrachloride as starting materials were obtained. Samples with different Ti/Zn precursor ratios were prepared for the study. Photocatalytic activities of the particles were evaluated under UV and visible light sources, using both arsenic-laced solution and industrial copper smelting wastewater. Results generally show that nanopowder composites are formed. Samples with Ti/Zn precursor ratio of 90:10 and 50:50 showed considerable photocatalytic activities leading to up to 90% arsenic degradation under UV and visible light irradiation; however, compared experientially made a solution in the laboratory, the industrial wastewaters resulted in less arsenic photodegradation.

Keywords

Arsenic removal Industrial wastewater Photocatalytic process ZnO–TiO2 composite Nanostructure 

Notes

Acknowledgements

The authors acknowledge Dr. Reza Naseh from National Iranian Copper Industries Co. (NICICO) for his kind industrial comments. Also, the authors acknowledge Dr. Davod Mohebbi-Kalhori for proofreading the manuscript.

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Copyright information

© Islamic Azad University (IAU) 2017

Authors and Affiliations

  1. 1.Department of Materials Engineering, Faculty of EngineeringUniversity of Sistan and BaluchestanZahedanIran
  2. 2.Department of Materials Engineering, Faculty of EngineeringShahid Bahonar University of KermanKermanIran

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