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Vol. 29 No. 2 (2017): Vol 29 Issue 2

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Degradation of Malachite Green by Silver Doped TiO2

https://doi.org/10.14233/ajchem.2017.20092
Humaira Rashid Khan
Department of Chemistry, Mirpur University of Science and Technology, Mirpur-10250, Pakistan
Muhammad Aziz Choudhary
Department of Chemistry, Mirpur University of Science and Technology, Mirpur-10250, Pakistan
Muhammad Aslam Mirza
Department of Chemistry, Mirpur University of Science and Technology, Mirpur-10250, Pakistan
Zahoor Ahmed
Department of Chemistry, Mirpur University of Science and Technology, Mirpur-10250, Pakistan
Yaqoob Khan
National Research Center for Physics, Islamabad-45320, Pakistan

Corresponding Author(s) : Humaira Rashid Khan

hrhummingbird@gmail.com

Asian Journal of Chemistry, Vol. 29 No. 2 (2017): Vol 29 Issue 2

Abstract

The present work reports the efficiency of Ag-doped and undoped TiO2 for photocatalytic break down of malachite green colourant. The influence of various factors such as dye concentration, catalyst dose, pH, intensity of light etc., on degradation of dye was observed. By changing the parameters optimum conditions (pH 9, dye concentration 5 × 10-6 mol/L, amount of nano catalyst used 0.12 g and intensity of light 60 mW cm–2.) were obtained. It was observed that photocatalytic degradation was maximum i.e. 99.5 % by using Ag doped TiO2 as compared to undoped TiO2 which was found to be 75 %, respectively. Scavenger studies have been applied to confirm the contribution of OH free radical. Many harmful products were produced by mineralization of these coloured compounds. The experimental records proved that the reaction follows Langmuir Hinshelwood model and pseudo first order kinetics.

Keywords

Malachite Degradation Ag doped TiO2 Kinetics
Khan, H. R., Choudhary, M. A., Mirza, M. A., Ahmed, Z., & Khan, Y. (2016). Degradation of Malachite Green by Silver Doped TiO2. Asian Journal of Chemistry, 29(2), 257–260. https://doi.org/10.14233/ajchem.2017.20092
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