SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE

ABSTRACT The visible light spectral response of titania nanoparticles synthesized by hybrid treatment of TiO2 with silver dopant and Eosin Y-sensitizer was evaluated using caffeine, an emerging pollutant. The photocatalyst was characterized using scanning electron microscopy (SEM), x-ray diffraction...

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Autores principales:	Ibrahim,Muktar Musa, Gaya,Umar Ibrahim
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2019
Materias:	TiO2 Photocatalysis Caffeine Taguchi RSM Doping
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104275
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spelling	oai:scielo:S0717-970720190001042752019-04-11SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINEIbrahim,Muktar MusaGaya,Umar Ibrahim TiO2 Photocatalysis Caffeine Taguchi RSM Doping ABSTRACT The visible light spectral response of titania nanoparticles synthesized by hybrid treatment of TiO2 with silver dopant and Eosin Y-sensitizer was evaluated using caffeine, an emerging pollutant. The photocatalyst was characterized using scanning electron microscopy (SEM), x-ray diffraction (XRD), solid state UV/Visible spectrometry and Fourier transform infrared spectrometry (FTIR). Upon sensitization and doping, downsizing, increase in surface area and redshift were observed without significant annihilation of the tetragonal anatase and rutile structures. Factors affecting the degradation of caffeine were studied using Taguchi orthogonal array model and optimized using a response surface methodology (RSM) based on faced-centered composite design (FCCD). Caffeine degradation under the conditions of the study was not affected significantly by temperature but pH, initial concentration and catalyst concentration. Evidence for electron injection and red shift with sensitization was corroborated using quantum calculations at DFT/B3LYP level of the theory.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.64 n.1 20192019-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104275en10.4067/s0717-97072019000104275
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	TiO2 Photocatalysis Caffeine Taguchi RSM Doping
spellingShingle	TiO2 Photocatalysis Caffeine Taguchi RSM Doping Ibrahim,Muktar Musa Gaya,Umar Ibrahim SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
description	ABSTRACT The visible light spectral response of titania nanoparticles synthesized by hybrid treatment of TiO2 with silver dopant and Eosin Y-sensitizer was evaluated using caffeine, an emerging pollutant. The photocatalyst was characterized using scanning electron microscopy (SEM), x-ray diffraction (XRD), solid state UV/Visible spectrometry and Fourier transform infrared spectrometry (FTIR). Upon sensitization and doping, downsizing, increase in surface area and redshift were observed without significant annihilation of the tetragonal anatase and rutile structures. Factors affecting the degradation of caffeine were studied using Taguchi orthogonal array model and optimized using a response surface methodology (RSM) based on faced-centered composite design (FCCD). Caffeine degradation under the conditions of the study was not affected significantly by temperature but pH, initial concentration and catalyst concentration. Evidence for electron injection and red shift with sensitization was corroborated using quantum calculations at DFT/B3LYP level of the theory.
author	Ibrahim,Muktar Musa Gaya,Umar Ibrahim
author_facet	Ibrahim,Muktar Musa Gaya,Umar Ibrahim
author_sort	Ibrahim,Muktar Musa
title	SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
title_short	SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
title_full	SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
title_fullStr	SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
title_full_unstemmed	SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE
title_sort	synthesis of eosin y-sensitized ag-tio2 nano-hybrid for optimized photocatalytic degradation of aqueous caffeine
publisher	Sociedad Chilena de Química
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072019000104275
work_keys_str_mv	AT ibrahimmuktarmusa synthesisofeosinysensitizedagtio2nanohybridforoptimizedphotocatalyticdegradationofaqueouscaffeine AT gayaumaribrahim synthesisofeosinysensitizedagtio2nanohybridforoptimizedphotocatalyticdegradationofaqueouscaffeine
_version_	1714200933590630400

SYNTHESIS OF EOSIN Y-SENSITIZED Ag-TiO2 NANO-HYBRID FOR OPTIMIZED PHOTOCATALYTIC DEGRADATION OF AQUEOUS CAFFEINE

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