Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants
We have explored an efficient strategy to enhance the overall photocatalytic performances of layered perovskites by increasing the density of hydroxyl group by protonation. The experimental procedure consisted of the slow replacement of interlayer Rb<sup>+</sup> cation of RbLaTa<sub&g...
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doaj-749dc368b5384464b839d5f61a9ed6c92020-11-25T03:05:28ZengMDPI AGCatalysts2073-43442020-06-011063763710.3390/catal10060637Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated PollutantsMonica Raciulete0Florica Papa1Catalin Negrila2Veronica Bratan3Cornel Munteanu4Jeanina Pandele-Cusu5Daniela C. Culita6Irina Atkinson7Ioan Balint8“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Institute of Material Physics, P.O. Box MG 7, RO-77125 Magurele, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaWe have explored an efficient strategy to enhance the overall photocatalytic performances of layered perovskites by increasing the density of hydroxyl group by protonation. The experimental procedure consisted of the slow replacement of interlayer Rb<sup>+</sup> cation of RbLaTa<sub>2</sub>O<sub>7</sub> Dion-Jacobson (DJ) perovskite by H<sup>+</sup> via acid treatment. Two layered perovskites synthesized by mild (1200 °C for 18 h) and harsh (950 and 1200 °C, for 36 h) annealing treatment routes were used as starting materials. The successful intercalation of proton into D-J interlayer galleries was confirmed by FTIR spectroscopy, thermal analyses, ion chromatography and XPS results. In addition, the ion-exchange route was effective to enlarge the specific surface area, thus enhancing the supply of photocharges able to participate in redox processes involved in the degradation of organic pollutants. HLaTa_01 protonated layered perovskite is reported as a efficient photocatalyst for photomineralization of trichloroethylene (TCE) to Cl<sup>−</sup> and CO<sub>2</sub> under simulated solar light. The enhanced activity is attributed to combined beneficial roles played by the increased specific surface area and high density of hydroxyl groups, leading to an efficiency of TCE mineralization of 68% moles after 5 h of irradiation.https://www.mdpi.com/2073-4344/10/6/637perovskite-type structureion-exchangephotocatalysisTCE photodegradationsimulated solar light |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Monica Raciulete Florica Papa Catalin Negrila Veronica Bratan Cornel Munteanu Jeanina Pandele-Cusu Daniela C. Culita Irina Atkinson Ioan Balint |
spellingShingle |
Monica Raciulete Florica Papa Catalin Negrila Veronica Bratan Cornel Munteanu Jeanina Pandele-Cusu Daniela C. Culita Irina Atkinson Ioan Balint Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants Catalysts perovskite-type structure ion-exchange photocatalysis TCE photodegradation simulated solar light |
author_facet |
Monica Raciulete Florica Papa Catalin Negrila Veronica Bratan Cornel Munteanu Jeanina Pandele-Cusu Daniela C. Culita Irina Atkinson Ioan Balint |
author_sort |
Monica Raciulete |
title |
Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants |
title_short |
Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants |
title_full |
Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants |
title_fullStr |
Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants |
title_full_unstemmed |
Strategy for Modifying Layered Perovskites toward Efficient Solar Light-Driven Photocatalysts for Removal of Chlorinated Pollutants |
title_sort |
strategy for modifying layered perovskites toward efficient solar light-driven photocatalysts for removal of chlorinated pollutants |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2020-06-01 |
description |
We have explored an efficient strategy to enhance the overall photocatalytic performances of layered perovskites by increasing the density of hydroxyl group by protonation. The experimental procedure consisted of the slow replacement of interlayer Rb<sup>+</sup> cation of RbLaTa<sub>2</sub>O<sub>7</sub> Dion-Jacobson (DJ) perovskite by H<sup>+</sup> via acid treatment. Two layered perovskites synthesized by mild (1200 °C for 18 h) and harsh (950 and 1200 °C, for 36 h) annealing treatment routes were used as starting materials. The successful intercalation of proton into D-J interlayer galleries was confirmed by FTIR spectroscopy, thermal analyses, ion chromatography and XPS results. In addition, the ion-exchange route was effective to enlarge the specific surface area, thus enhancing the supply of photocharges able to participate in redox processes involved in the degradation of organic pollutants. HLaTa_01 protonated layered perovskite is reported as a efficient photocatalyst for photomineralization of trichloroethylene (TCE) to Cl<sup>−</sup> and CO<sub>2</sub> under simulated solar light. The enhanced activity is attributed to combined beneficial roles played by the increased specific surface area and high density of hydroxyl groups, leading to an efficiency of TCE mineralization of 68% moles after 5 h of irradiation. |
topic |
perovskite-type structure ion-exchange photocatalysis TCE photodegradation simulated solar light |
url |
https://www.mdpi.com/2073-4344/10/6/637 |
work_keys_str_mv |
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