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Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation

[Image: see text] This work demonstrates a two-step gram-scale synthesis of presynthesized silver (Ag) nanoparticles impregnated with mesoporous TiO(2) and evaluates their feasibility for wastewater treatment and hydrogen gas generation under natural sunlight. Paracetamol was chosen as the model pha...

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Autores principales: Cherif, Yassine, Azzi, Hajer, Sridharan, Kishore, Ji, Seulgi, Choi, Heechae, Allan, Michael G., Benaissa, Sihem, Saidi-Bendahou, Karima, Damptey, Lois, Ribeiro, Camila Silva, Krishnamurthy, Satheesh, Nagarajan, Sanjay, Maroto-Valer, M. Mercedes, Kuehnel, Moritz F., Pitchaimuthu, Sudhagar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9835632/
https://www.ncbi.nlm.nih.gov/pubmed/36643558
http://dx.doi.org/10.1021/acsomega.2c06657
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author Cherif, Yassine
Azzi, Hajer
Sridharan, Kishore
Ji, Seulgi
Choi, Heechae
Allan, Michael G.
Benaissa, Sihem
Saidi-Bendahou, Karima
Damptey, Lois
Ribeiro, Camila Silva
Krishnamurthy, Satheesh
Nagarajan, Sanjay
Maroto-Valer, M. Mercedes
Kuehnel, Moritz F.
Pitchaimuthu, Sudhagar
author_facet Cherif, Yassine
Azzi, Hajer
Sridharan, Kishore
Ji, Seulgi
Choi, Heechae
Allan, Michael G.
Benaissa, Sihem
Saidi-Bendahou, Karima
Damptey, Lois
Ribeiro, Camila Silva
Krishnamurthy, Satheesh
Nagarajan, Sanjay
Maroto-Valer, M. Mercedes
Kuehnel, Moritz F.
Pitchaimuthu, Sudhagar
author_sort Cherif, Yassine
collection PubMed
description [Image: see text] This work demonstrates a two-step gram-scale synthesis of presynthesized silver (Ag) nanoparticles impregnated with mesoporous TiO(2) and evaluates their feasibility for wastewater treatment and hydrogen gas generation under natural sunlight. Paracetamol was chosen as the model pharmaceutical pollutant for evaluating photocatalytic performance. A systematic material analysis (morphology, chemical environment, optical bandgap energy) of the Ag/TiO(2) photocatalyst powder was carried out, and the influence of material properties on the performance is discussed in detail. The experimental results showed that the decoration of anatase TiO(2) nanoparticles (size between 80 and 100 nm) with 5 nm Ag nanoparticles (1 wt %) induced visible-light absorption and enhanced charge carrier separation. As a result, 0.01 g/L Ag/TiO(2) effectively removed 99% of 0.01 g/L paracetamol in 120 min and exhibited 60% higher photocatalytic removal than pristine TiO(2). Alongside paracetamol degradation, Ag/TiO(2) led to the generation of 1729 μmol H(2) g(–1) h(–1). This proof-of-concept approach for tandem pollutant degradation and hydrogen generation was further evaluated with rare earth metal (lanthanum)- and nonmetal (nitrogen)-doped TiO(2), which also showed a positive response. Using a combination of ab initio calculations and our new theory model, we revealed that the enhanced photocatalytic performance of Ag/TiO(2) was due to the surface Fermi-level change of TiO(2) and lowered surface reaction energy barrier for water pollutant oxidation. This work opens new opportunities for exploiting tandem photocatalytic routes beyond water splitting and understanding the simultaneous reactions in metal-doped metal oxide photocatalyst systems under natural sunlight.
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spelling pubmed-98356322023-01-13 Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation Cherif, Yassine Azzi, Hajer Sridharan, Kishore Ji, Seulgi Choi, Heechae Allan, Michael G. Benaissa, Sihem Saidi-Bendahou, Karima Damptey, Lois Ribeiro, Camila Silva Krishnamurthy, Satheesh Nagarajan, Sanjay Maroto-Valer, M. Mercedes Kuehnel, Moritz F. Pitchaimuthu, Sudhagar ACS Omega [Image: see text] This work demonstrates a two-step gram-scale synthesis of presynthesized silver (Ag) nanoparticles impregnated with mesoporous TiO(2) and evaluates their feasibility for wastewater treatment and hydrogen gas generation under natural sunlight. Paracetamol was chosen as the model pharmaceutical pollutant for evaluating photocatalytic performance. A systematic material analysis (morphology, chemical environment, optical bandgap energy) of the Ag/TiO(2) photocatalyst powder was carried out, and the influence of material properties on the performance is discussed in detail. The experimental results showed that the decoration of anatase TiO(2) nanoparticles (size between 80 and 100 nm) with 5 nm Ag nanoparticles (1 wt %) induced visible-light absorption and enhanced charge carrier separation. As a result, 0.01 g/L Ag/TiO(2) effectively removed 99% of 0.01 g/L paracetamol in 120 min and exhibited 60% higher photocatalytic removal than pristine TiO(2). Alongside paracetamol degradation, Ag/TiO(2) led to the generation of 1729 μmol H(2) g(–1) h(–1). This proof-of-concept approach for tandem pollutant degradation and hydrogen generation was further evaluated with rare earth metal (lanthanum)- and nonmetal (nitrogen)-doped TiO(2), which also showed a positive response. Using a combination of ab initio calculations and our new theory model, we revealed that the enhanced photocatalytic performance of Ag/TiO(2) was due to the surface Fermi-level change of TiO(2) and lowered surface reaction energy barrier for water pollutant oxidation. This work opens new opportunities for exploiting tandem photocatalytic routes beyond water splitting and understanding the simultaneous reactions in metal-doped metal oxide photocatalyst systems under natural sunlight. American Chemical Society 2022-12-28 /pmc/articles/PMC9835632/ /pubmed/36643558 http://dx.doi.org/10.1021/acsomega.2c06657 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Cherif, Yassine
Azzi, Hajer
Sridharan, Kishore
Ji, Seulgi
Choi, Heechae
Allan, Michael G.
Benaissa, Sihem
Saidi-Bendahou, Karima
Damptey, Lois
Ribeiro, Camila Silva
Krishnamurthy, Satheesh
Nagarajan, Sanjay
Maroto-Valer, M. Mercedes
Kuehnel, Moritz F.
Pitchaimuthu, Sudhagar
Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title_full Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title_fullStr Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title_full_unstemmed Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title_short Facile Synthesis of Gram-Scale Mesoporous Ag/TiO(2) Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation
title_sort facile synthesis of gram-scale mesoporous ag/tio(2) photocatalysts for pharmaceutical water pollutant removal and green hydrogen generation
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9835632/
https://www.ncbi.nlm.nih.gov/pubmed/36643558
http://dx.doi.org/10.1021/acsomega.2c06657
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