De-Ethylation and Cleavage of Rhodamine B by a Zirconium Phosphate/Silver Bromide Composite Photocatalyst
A composite heterogeneous photocatalyst based on silver bromide was prepared by a reaction of silver exchanged zirconium phosphate (ZrP) and HBr. The ZrP/AgBr composite containing 53 wt% AgBr was tested in the photocatalytic degradation of Rhodamine B (RhB) and exhibited higher catalytic activity wi...
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description | A composite heterogeneous photocatalyst based on silver bromide was prepared by a reaction of silver exchanged zirconium phosphate (ZrP) and HBr. The ZrP/AgBr composite containing 53 wt% AgBr was tested in the photocatalytic degradation of Rhodamine B (RhB) and exhibited higher catalytic activity with respect to pure AgBr. As a matter of fact, the time needed to achieve a percentage of chromophore cleavage of about 90% was 3 min for the composite versus the 30 min needed for pure AgBr. The ZrP/AgBr composite turned out to be stable for at least three consecutive cycles. The UV-Vis spectra of the RhB solution, recorded at different irradiation times, were also decomposed and the concentration of the species formed by de-ethylation and cleavage processes during photocatalysis were calculated; the data obtained for the AgBr-based catalysis were also compared with those for the AgCl-based catalysis, and the degradation mechanism was suggested for both catalytic systems. |
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The ZrP/AgBr composite containing 53 wt% AgBr was tested in the photocatalytic degradation of Rhodamine B (RhB) and exhibited higher catalytic activity with respect to pure AgBr. As a matter of fact, the time needed to achieve a percentage of chromophore cleavage of about 90% was 3 min for the composite versus the 30 min needed for pure AgBr. The ZrP/AgBr composite turned out to be stable for at least three consecutive cycles. The UV-Vis spectra of the RhB solution, recorded at different irradiation times, were also decomposed and the concentration of the species formed by de-ethylation and cleavage processes during photocatalysis were calculated; the data obtained for the AgBr-based catalysis were also compared with those for the AgCl-based catalysis, and the degradation mechanism was suggested for both catalytic systems.</description><identifier>ISSN: 2073-4344</identifier><identifier>EISSN: 2073-4344</identifier><identifier>DOI: 10.3390/catal9010003</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Catalysis ; Catalysts ; Catalytic activity ; Chemical reactions ; Chromophores ; Cleavage ; Composite materials ; Morphology ; Nanoparticles ; Particle size ; Photocatalysis ; Photocatalysts ; Photodegradation ; Rhodamine ; Scanning electron microscopy ; Silver ; Silver chloride ; Spectrum analysis ; Zirconium</subject><ispartof>Catalysts, 2019-01, Vol.9 (1), p.3</ispartof><rights>2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 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The UV-Vis spectra of the RhB solution, recorded at different irradiation times, were also decomposed and the concentration of the species formed by de-ethylation and cleavage processes during photocatalysis were calculated; the data obtained for the AgBr-based catalysis were also compared with those for the AgCl-based catalysis, and the degradation mechanism was suggested for both catalytic systems.</description><subject>Catalysis</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Chemical reactions</subject><subject>Chromophores</subject><subject>Cleavage</subject><subject>Composite materials</subject><subject>Morphology</subject><subject>Nanoparticles</subject><subject>Particle size</subject><subject>Photocatalysis</subject><subject>Photocatalysts</subject><subject>Photodegradation</subject><subject>Rhodamine</subject><subject>Scanning electron microscopy</subject><subject>Silver</subject><subject>Silver chloride</subject><subject>Spectrum analysis</subject><subject>Zirconium</subject><issn>2073-4344</issn><issn>2073-4344</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNkD1PwzAYhC0EElXpxg-wxEqov1LbIw0tIFUC8bGwRI7jEFdJHGy3Uv49KWXo9N7w3L2nA-AaoztKJZprFVUjEUYI0TMwIYjThFHGzk_0JZiFsB0JJDEVOJ0A-2CSVayHRkXrOqi6EmaNUXv1baCr4FvtStXazsAlLAao4Jf12nV218LX2oW-VtHM322zNx4uvWttaWDm2t4FG80Bie6v1xDiFbioVBPM7P9Owed69ZE9JZuXx-fsfpNoInlMUqY4GasZQSlClcALhli10CmXgitNCRPYSMKk1IyKgpKU6wKPFlosGMclnYKbY27v3c_OhJhv3c5348ucpIyngmAhR-r2SGnvQvCmyntvW-WHHKP8sGd-uif9Baj1Zzo</recordid><startdate>20190101</startdate><enddate>20190101</enddate><creator>Pica, Monica</creator><creator>Calzuola, Silvia</creator><creator>Donnadio, Anna</creator><creator>Gentili, Pier Luigi</creator><creator>Nocchetti, Morena</creator><creator>Casciola, Mario</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PHGZM</scope><scope>PHGZT</scope><scope>PIMPY</scope><scope>PKEHL</scope><scope>PQEST</scope><scope>PQGLB</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0003-1092-9190</orcidid><orcidid>https://orcid.org/0000-0002-9121-7875</orcidid><orcidid>https://orcid.org/0000-0003-2927-1130</orcidid></search><sort><creationdate>20190101</creationdate><title>De-Ethylation and Cleavage of Rhodamine B by a Zirconium Phosphate/Silver Bromide Composite Photocatalyst</title><author>Pica, Monica ; 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The ZrP/AgBr composite containing 53 wt% AgBr was tested in the photocatalytic degradation of Rhodamine B (RhB) and exhibited higher catalytic activity with respect to pure AgBr. As a matter of fact, the time needed to achieve a percentage of chromophore cleavage of about 90% was 3 min for the composite versus the 30 min needed for pure AgBr. The ZrP/AgBr composite turned out to be stable for at least three consecutive cycles. The UV-Vis spectra of the RhB solution, recorded at different irradiation times, were also decomposed and the concentration of the species formed by de-ethylation and cleavage processes during photocatalysis were calculated; the data obtained for the AgBr-based catalysis were also compared with those for the AgCl-based catalysis, and the degradation mechanism was suggested for both catalytic systems.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/catal9010003</doi><orcidid>https://orcid.org/0000-0003-1092-9190</orcidid><orcidid>https://orcid.org/0000-0002-9121-7875</orcidid><orcidid>https://orcid.org/0000-0003-2927-1130</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Catalysis Catalysts Catalytic activity Chemical reactions Chromophores Cleavage Composite materials Morphology Nanoparticles Particle size Photocatalysis Photocatalysts Photodegradation Rhodamine Scanning electron microscopy Silver Silver chloride Spectrum analysis Zirconium |
title | De-Ethylation and Cleavage of Rhodamine B by a Zirconium Phosphate/Silver Bromide Composite Photocatalyst |
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