Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst

In this study, the photodegradation of Congo red dye (CR) in aqueous solution was investigated using Au-Pd/TiO2 as photocatalyst. The concentration of dye, dosage of photocatalyst, amount of H2O2, pH of the medium and temperature were examined to find the optimum values of these parameters. It has...

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Autores principales:	Souad A. Mousa, Sanaa Tareq, Eman A. Muhammed
Formato:	article
Lenguaje:	AR EN
Publicado:	College of Science for Women, University of Baghdad 2021
Materias:	الدوال الثرموداينميكية، التفكك الضوئي, الحركية ، صبغة الكونكو الحمراء، ثاني اوكسيد التيتانيوم Science Q
Acceso en línea:	https://doaj.org/article/2ef04e6762b24d7aac903d15d9fe4596
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spelling	oai:doaj.org-article:2ef04e6762b24d7aac903d15d9fe45962021-12-04T16:12:54ZStudying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst10.21123/bsj.2021.18.4.12612078-86652411-7986https://doaj.org/article/2ef04e6762b24d7aac903d15d9fe45962021-12-01T00:00:00Zhttps://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/5000https://doaj.org/toc/2078-8665https://doaj.org/toc/2411-7986 In this study, the photodegradation of Congo red dye (CR) in aqueous solution was investigated using Au-Pd/TiO2 as photocatalyst. The concentration of dye, dosage of photocatalyst, amount of H2O2, pH of the medium and temperature were examined to find the optimum values of these parameters. It has been found that 28 ppm was the best dye concentration. The optimum amount of photocatalyst was 0.09 g/75 mL of dye solution when the degradation percent was ~ 96 % after irradiation time of 12 hours, while the best amount of hydrogen peroxide was 7μl/75 mL of dye solution at degradation percent ~97 % after irradiation time of 10 hours, whereas pH 5 was the best value to carry out the reaction at the highest degradation percent. In addition, temperature tested at range of (25-55) C˚, and it has been figured out which photodegradation percent of dye increase with raising temperature (degradation percent was ~ 98% after irradiation time of 4 hours at 55 C˚), and the activation energy of the reaction was calculated (34.8016 kJ/mole) from Arrhenius law. The thermodynamic functions ΔH#, ΔG#, and ΔS# were obtained, where ΔH# and ΔG# are positive value which means that the reaction is endothermic and non-spontaneous respectively, while ΔS# has a negative value, thus indicates that the reactants are more disordered than the excited intermediate formed. The kinetic of the reaction was studied, and it has been found that the photocatalytic reaction follows pseudo first order reaction. Souad A. MousaSanaa TareqEman A. MuhammedCollege of Science for Women, University of Baghdadarticleالدوال الثرموداينميكية، التفكك الضوئي, الحركية ، صبغة الكونكو الحمراء، ثاني اوكسيد التيتانيومScienceQARENBaghdad Science Journal, Vol 18, Iss 4 (2021)
institution	DOAJ
collection	DOAJ
language	AR EN
topic	الدوال الثرموداينميكية، التفكك الضوئي, الحركية ، صبغة الكونكو الحمراء، ثاني اوكسيد التيتانيوم Science Q
spellingShingle	الدوال الثرموداينميكية، التفكك الضوئي, الحركية ، صبغة الكونكو الحمراء، ثاني اوكسيد التيتانيوم Science Q Souad A. Mousa Sanaa Tareq Eman A. Muhammed Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
description	In this study, the photodegradation of Congo red dye (CR) in aqueous solution was investigated using Au-Pd/TiO2 as photocatalyst. The concentration of dye, dosage of photocatalyst, amount of H2O2, pH of the medium and temperature were examined to find the optimum values of these parameters. It has been found that 28 ppm was the best dye concentration. The optimum amount of photocatalyst was 0.09 g/75 mL of dye solution when the degradation percent was ~ 96 % after irradiation time of 12 hours, while the best amount of hydrogen peroxide was 7μl/75 mL of dye solution at degradation percent ~97 % after irradiation time of 10 hours, whereas pH 5 was the best value to carry out the reaction at the highest degradation percent. In addition, temperature tested at range of (25-55) C˚, and it has been figured out which photodegradation percent of dye increase with raising temperature (degradation percent was ~ 98% after irradiation time of 4 hours at 55 C˚), and the activation energy of the reaction was calculated (34.8016 kJ/mole) from Arrhenius law. The thermodynamic functions ΔH#, ΔG#, and ΔS# were obtained, where ΔH# and ΔG# are positive value which means that the reaction is endothermic and non-spontaneous respectively, while ΔS# has a negative value, thus indicates that the reactants are more disordered than the excited intermediate formed. The kinetic of the reaction was studied, and it has been found that the photocatalytic reaction follows pseudo first order reaction.
format	article
author	Souad A. Mousa Sanaa Tareq Eman A. Muhammed
author_facet	Souad A. Mousa Sanaa Tareq Eman A. Muhammed
author_sort	Souad A. Mousa
title	Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
title_short	Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
title_full	Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
title_fullStr	Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
title_full_unstemmed	Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst
title_sort	studying the photodegradation of congo red dye from aqueous solutions using bimetallic au–pd/tio2 photocatalyst
publisher	College of Science for Women, University of Baghdad
publishDate	2021
url	https://doaj.org/article/2ef04e6762b24d7aac903d15d9fe4596
work_keys_str_mv	AT souadamousa studyingthephotodegradationofcongoreddyefromaqueoussolutionsusingbimetallicaupdtio2photocatalyst AT sanaatareq studyingthephotodegradationofcongoreddyefromaqueoussolutionsusingbimetallicaupdtio2photocatalyst AT emanamuhammed studyingthephotodegradationofcongoreddyefromaqueoussolutionsusingbimetallicaupdtio2photocatalyst
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Studying the Photodegradation of Congo Red Dye from Aqueous Solutions Using Bimetallic Au–Pd/TiO2 Photocatalyst

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