Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation

Three photocatalysts (CdS, ZnFe2O4, and NiFe2O4) were synthesized and their ability to photodegrade methylene blue (MB) was evaluated. MB was degraded by both spinel photocatalysts under visible light at room temperature, although their efficacy was less than that for CdS. The photocatalytic efficac...

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Autores principales:	Xiaoyu Wang, Susan J. Masten, Elaheh Esfahanian
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	life cycle assessment photocatalytic degradation spinel photocatalysts water purification Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/68d42d32c5a147628906d109de1273a7
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spelling	oai:doaj.org-article:68d42d32c5a147628906d109de1273a72021-11-06T10:50:35ZComparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation0273-12231996-973210.2166/wst.2021.036https://doaj.org/article/68d42d32c5a147628906d109de1273a72021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/5/993https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Three photocatalysts (CdS, ZnFe2O4, and NiFe2O4) were synthesized and their ability to photodegrade methylene blue (MB) was evaluated. MB was degraded by both spinel photocatalysts under visible light at room temperature, although their efficacy was less than that for CdS. The photocatalytic efficacies of NiFe2O4 were observed to be much greater than that for ZnFe2O4. All the synthesized nanoparticles absorbed visible light, while CdS had a larger absorption range within the visible light spectra and the most porous surface. Photo-deactivation was observed during the study, which could be due to the chemical adsorption of the degraded products on the catalyst surface. The factors that affected MB removal efficacy include the absorption range of photocatalysts, initial MB concentrations, amount of photocatalysts added, and photoreactor conditions. Life cycle analysis was used to compare the preparation methods of the photocatalysts in terms of energy consumption and environmental impact. The results showed that the hydrothermal method for NiFe2O4 preparation was less energy-intensive than the sol-gel method for CdS and ZnFe2O4 as the hydrothermal method is effective over a wider range of temperatures in aqueous media. Also, as ZnFe2O4, and NiFe2O4 have lower environmental impacts than CdS both show promise as photocatalysts.Xiaoyu WangSusan J. MastenElaheh EsfahanianIWA Publishingarticlelife cycle assessmentphotocatalytic degradationspinel photocatalystswater purificationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 5, Pp 993-1004 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	life cycle assessment photocatalytic degradation spinel photocatalysts water purification Environmental technology. Sanitary engineering TD1-1066
spellingShingle	life cycle assessment photocatalytic degradation spinel photocatalysts water purification Environmental technology. Sanitary engineering TD1-1066 Xiaoyu Wang Susan J. Masten Elaheh Esfahanian Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
description	Three photocatalysts (CdS, ZnFe2O4, and NiFe2O4) were synthesized and their ability to photodegrade methylene blue (MB) was evaluated. MB was degraded by both spinel photocatalysts under visible light at room temperature, although their efficacy was less than that for CdS. The photocatalytic efficacies of NiFe2O4 were observed to be much greater than that for ZnFe2O4. All the synthesized nanoparticles absorbed visible light, while CdS had a larger absorption range within the visible light spectra and the most porous surface. Photo-deactivation was observed during the study, which could be due to the chemical adsorption of the degraded products on the catalyst surface. The factors that affected MB removal efficacy include the absorption range of photocatalysts, initial MB concentrations, amount of photocatalysts added, and photoreactor conditions. Life cycle analysis was used to compare the preparation methods of the photocatalysts in terms of energy consumption and environmental impact. The results showed that the hydrothermal method for NiFe2O4 preparation was less energy-intensive than the sol-gel method for CdS and ZnFe2O4 as the hydrothermal method is effective over a wider range of temperatures in aqueous media. Also, as ZnFe2O4, and NiFe2O4 have lower environmental impacts than CdS both show promise as photocatalysts.
format	article
author	Xiaoyu Wang Susan J. Masten Elaheh Esfahanian
author_facet	Xiaoyu Wang Susan J. Masten Elaheh Esfahanian
author_sort	Xiaoyu Wang
title	Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
title_short	Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
title_full	Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
title_fullStr	Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
title_full_unstemmed	Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation
title_sort	comparison of the photocatalytic efficacy and environmental impact of cds, znfe2o4, and nife2o4 under visible light irradiation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/68d42d32c5a147628906d109de1273a7
work_keys_str_mv	AT xiaoyuwang comparisonofthephotocatalyticefficacyandenvironmentalimpactofcdsznfe2o4andnife2o4undervisiblelightirradiation AT susanjmasten comparisonofthephotocatalyticefficacyandenvironmentalimpactofcdsznfe2o4andnife2o4undervisiblelightirradiation AT elahehesfahanian comparisonofthephotocatalyticefficacyandenvironmentalimpactofcdsznfe2o4andnife2o4undervisiblelightirradiation
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Comparison of the photocatalytic efficacy and environmental impact of CdS, ZnFe2O4, and NiFe2O4 under visible light irradiation

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