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Vol. 29 No. 1 (2017): Vol 29 Issue 1

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Impact of Wastewater Strength and Photocatalyst Loading on Decolourization of Acid Orange 7 by Co-Doped TiO2

https://doi.org/10.14233/ajchem.2017.20162
Erick Butler1
1School of Engineering, Computer Science and Mathematics, West Texas A&M University, Canyon, TX 79016, USA 2Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115, USA 3Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan *Corresponding author: Tel: +1 806 6512271; E-mail: erick.ben.butler@gmail.com
Oliver Mulamba1
1School of Engineering, Computer Science and Mathematics, West Texas A&M University, Canyon, TX 79016, USA 2Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115, USA 3Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan *Corresponding author: Tel: +1 806 6512271; E-mail: erick.ben.butler@gmail.com
Yung-Tse Hung2
1School of Engineering, Computer Science and Mathematics, West Texas A&M University, Canyon, TX 79016, USA 2Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115, USA 3Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan *Corresponding author: Tel: +1 806 6512271; E-mail: erick.ben.butler@gmail.com
Ching-Cheng Chen3
1School of Engineering, Computer Science and Mathematics, West Texas A&M University, Canyon, TX 79016, USA 2Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115, USA 3Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan *Corresponding author: Tel: +1 806 6512271; E-mail: erick.ben.butler@gmail.com
Yen-Pei Fu3
1School of Engineering, Computer Science and Mathematics, West Texas A&M University, Canyon, TX 79016, USA 2Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio 44115, USA 3Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan *Corresponding author: Tel: +1 806 6512271; E-mail: erick.ben.butler@gmail.com

Asian Journal of Chemistry, Vol. 29 No. 1 (2017): Vol 29 Issue 1

Abstract

Heterogeneous photocatalysis has proved to be a successful method for the degradation of water pollutants. In this work, the photocatalytic decolourization of acid orange 7 was performed by cobalt-doped titanium dioxide (Co-doped TiO2). The Co-doped TiO2 was synthesized and characterized using X-ray diffraction, scanning electron microscopy, energy diffraction spectroscopy, UV-visible reflective dispersion spectroscopy and adsorption of nitrogen gas. The acid orange 7 was prepared as a synthetic textile wastewater at three initial concentrations (24, 34 and 44 mg/L) with three photocatalyst loadings (0.025 g, 0.050, 0.1 g/100 mL acid orange 7). Results show a plateauing behaviour with the effect of photocatalyst concentration on removal of acid orange 7. As the concentration increased of acid orange 7, an ideal photocatalytic loading was found that outperformed higher concentrations in regards to removal of acid orange 7. As such it was concluded that high photocatalyst concentrations are not synonymous with efficient water treatment.

Keywords

Oxides X-ray photo-emission spectroscopy Photocatalytic degradation Optical properties Wastewater treatment.
Butler1, E., Mulamba1, O., Hung2, Y.-T., Chen3, C.-C., & Fu3, Y.-P. (2016). Impact of Wastewater Strength and Photocatalyst Loading on Decolourization of Acid Orange 7 by Co-Doped TiO2. Asian Journal of Chemistry, 29(1), 139–144. https://doi.org/10.14233/ajchem.2017.20162
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