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Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)

Herein we first report surface basicity mediated rapid and selective adsorptive removal of organic pollutants over nanocrystalline mesoporous CeO(2). The role of surface features in controlling the selectivity and efficiency of adsorption is well known. Nevertheless, the possibility of tuning the ad...

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Autores principales: Joshy, Deepak, Chakko, Seena, Ismail, Yahya A., Periyat, Pradeepan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419567/
https://www.ncbi.nlm.nih.gov/pubmed/36132658
http://dx.doi.org/10.1039/d1na00412c
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author Joshy, Deepak
Chakko, Seena
Ismail, Yahya A.
Periyat, Pradeepan
author_facet Joshy, Deepak
Chakko, Seena
Ismail, Yahya A.
Periyat, Pradeepan
author_sort Joshy, Deepak
collection PubMed
description Herein we first report surface basicity mediated rapid and selective adsorptive removal of organic pollutants over nanocrystalline mesoporous CeO(2). The role of surface features in controlling the selectivity and efficiency of adsorption is well known. Nevertheless, the possibility of tuning the adsorption capacity and selectivity of adsorbents through their surface characteristics remains less explored. In this work, the surface basicity of mesoporous CeO(2) nanoparticles was improved by Er(3+) doping under two different reaction conditions: via sol–gel and sol–hydrothermal methods. The nature and amount of surface basic sites were determined with the help of CO(2) temperature programmed desorption (TPD). The adsorption capacity and selectivity of four different CeO(2) samples were investigated using Congo red, methyl orange, and methylene blue as the model pollutants. From the adsorption studies, Er(3+) doped CeO(2) synthesized by the sol–gel method, having the highest amount of surface basic sites, proved to be the most efficient and highly selective adsorbent among the four developed variants of CeO(2) towards Congo red. According to the proposed mechanism, surface basicity can be employed as a controlling parameter capable of tuning the adsorption capacity as well as the selectivity of CeO(2) towards organic pollutants.
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spelling pubmed-94195672022-09-20 Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2) Joshy, Deepak Chakko, Seena Ismail, Yahya A. Periyat, Pradeepan Nanoscale Adv Chemistry Herein we first report surface basicity mediated rapid and selective adsorptive removal of organic pollutants over nanocrystalline mesoporous CeO(2). The role of surface features in controlling the selectivity and efficiency of adsorption is well known. Nevertheless, the possibility of tuning the adsorption capacity and selectivity of adsorbents through their surface characteristics remains less explored. In this work, the surface basicity of mesoporous CeO(2) nanoparticles was improved by Er(3+) doping under two different reaction conditions: via sol–gel and sol–hydrothermal methods. The nature and amount of surface basic sites were determined with the help of CO(2) temperature programmed desorption (TPD). The adsorption capacity and selectivity of four different CeO(2) samples were investigated using Congo red, methyl orange, and methylene blue as the model pollutants. From the adsorption studies, Er(3+) doped CeO(2) synthesized by the sol–gel method, having the highest amount of surface basic sites, proved to be the most efficient and highly selective adsorbent among the four developed variants of CeO(2) towards Congo red. According to the proposed mechanism, surface basicity can be employed as a controlling parameter capable of tuning the adsorption capacity as well as the selectivity of CeO(2) towards organic pollutants. RSC 2021-09-21 /pmc/articles/PMC9419567/ /pubmed/36132658 http://dx.doi.org/10.1039/d1na00412c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Joshy, Deepak
Chakko, Seena
Ismail, Yahya A.
Periyat, Pradeepan
Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title_full Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title_fullStr Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title_full_unstemmed Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title_short Surface basicity mediated rapid and selective adsorptive removal of Congo red over nanocrystalline mesoporous CeO(2)
title_sort surface basicity mediated rapid and selective adsorptive removal of congo red over nanocrystalline mesoporous ceo(2)
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419567/
https://www.ncbi.nlm.nih.gov/pubmed/36132658
http://dx.doi.org/10.1039/d1na00412c
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