Enhanced Photo catalytic Removal of Eosin Y and Methylene Blue by using TiO2 / GO/ PA as photo catalyst | [First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book) • 2022]

Author(s):

1. Afifa Rizwan: Department of Chemistry, The Rawalpindi Women University,Rawalpindi,Pakistan

2. Misbah Noor: Department of Chemistry, The Rawalpindi Women University,Rawalpindi,Pakistan

3. Azeema Munir: Department of Chemistry, Quaid-i-Azam University,Islamabad,Pakistan; Department of Chemistry, The Rawalpindi Women University,Rawalpindi,Pakistan

4. Afzal Shah: Department of Chemistry, Quaid-i-Azam University,Islamabad,Pakistan

Abstract:

Environmental problems are becoming more prevalent day by day, and it becomes one of the most serious global challenges. Textile industries are discharging a high amount of dyes into bodies of water without any treatment. Photocatalytic degradation is by far the most suitable method of removing dyes due to its high degradation percentage and low quantity of by-products. One of the best known and broadly used photo catalysts in this regard is TiO2, as it is non-toxic, cheap and highly stable chemically. To enhance its efficiency and to make it more effective, it is doped with Graphene oxide (GO). Immobilization of TiO2 with different types of poly amides is another useful technique as it increases the photo catalytic efficiency of catalyst and avoids the formation of secondary pollutants. The effects of this catalyst on photo degradation of Eosin Y (EY) and Methylene blue (MB) are investigated in this work. The band gap of TiO2 is larger (3.2 eV), but it decreases when doped with GO and PA. The photo degradation efficiency of TiO2 / GO/ PA catalyst is increased much as compared to TiO2 and TiO2 / GO catalysts. Degradation efficiency is also influenced by catalyst's dosage and change in pH. The absorbance spectra will be obtained by UV-Vis spectrophotometer. Maximum degradation is obtained at pH 5 and at pH 9 for EY and MB respectively. By linear regression model, both dyes follow the pseudo-first order kinetics. The R2 values for Eosin Y and MB are 0.9559 and 0.9685 respectively and degraded up to 95 % and 75 % approximately. Both dyes have different structures, functional groups, chemical properties and extent of ionization in aqueous solutions. It is supposed that both dyes behave in dissimilar manner in the process of photo degradation.

Page(s): 0-0

DOI: DOI not available

Published: Journal: First International Conference on Revamped Scientific Outlook of 21st Century (Abstract Book), Volume: 0, Issue: 0, Year: 2022

Keywords:

Photocatalyst , Photodegradation dyes , Methylene blue , Eosine

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