Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite
Removal of highly toxic H<sub>2</sub>S for pollution control and operational safety is a pressing need. For this purpose, a montmorillonite intercalated with Cu(II)-phenanthroline complex [Cu[(Phen)(H<sub>2</sub>O)<sub>2</sub>]<sup>2+</sup> (Mt-CuPhen)...
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MDPI AG
2020-05-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/6/510 |
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| author | Elena Castellini Fabrizio Bernini Lorenzo Sebastianelli Claro Ignacio Sainz-Díaz Aida Serrano German R. Castro Daniele Malferrari Maria Franca Brigatti Marco Borsari |
| author_facet | Elena Castellini Fabrizio Bernini Lorenzo Sebastianelli Claro Ignacio Sainz-Díaz Aida Serrano German R. Castro Daniele Malferrari Maria Franca Brigatti Marco Borsari |
| author_sort | Elena Castellini |
| collection | DOAJ |
| description | Removal of highly toxic H<sub>2</sub>S for pollution control and operational safety is a pressing need. For this purpose, a montmorillonite intercalated with Cu(II)-phenanthroline complex [Cu[(Phen)(H<sub>2</sub>O)<sub>2</sub>]<sup>2+</sup> (Mt-CuPhen) was prepared to capture gaseous H<sub>2</sub>S under mild conditions. This hybrid material was simple to obtain and demonstrated an outstanding ability to entrap H<sub>2</sub>S at room temperature, retaining high efficiency for a very long time (up to 36.8 g of S/100 g Mt-CuPhen after 3 months of exposure). Sorbent and H<sub>2</sub>S uptake were investigated by elemental analysis, X-ray powder diffraction measurements, diffuse reflectance (DR) UV–Vis and infrared spectroscopy, thermal analysis and evolved gas mass spectrometry, scanning electron microscopy equipped with energy-dispersive X-ray spectrometer, and X-ray absorption spectroscopy. The H<sub>2</sub>S capture was studied over time and a mechanism of action was proposed. The entrapping involves a catalytic mechanism in which [Cu[(Phen)(H<sub>2</sub>O)<sub>2</sub>]<sup>2+</sup> acts as catalyst for H<sub>2</sub>S oxidation to S<sup>0</sup> by atmospheric oxygen. The low cost and the long-lasting performance for H<sub>2</sub>S removal render Mt-CuPhen an extremely appealing trap for H<sub>2</sub>S removal and a promising material for many technological applications. |
| first_indexed | 2024-03-10T19:27:33Z |
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| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T19:27:33Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-3eec4021e47647daba1bbeeb9a9943952023-11-20T02:24:30ZengMDPI AGMinerals2075-163X2020-05-0110651010.3390/min10060510Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on MontmorilloniteElena Castellini0Fabrizio Bernini1Lorenzo Sebastianelli2Claro Ignacio Sainz-Díaz3Aida Serrano4German R. Castro5Daniele Malferrari6Maria Franca Brigatti7Marco Borsari8Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyInstituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Av. de las Palmeras, 4, 18100 Armilla, Granada, SpainSpLine, Spanish CRG BM25 Beamline at The European Synchrotron (The ESRF), 71 Avenue des Martyrs, F-38000 Grenoble, FranceSpLine, Spanish CRG BM25 Beamline at The European Synchrotron (The ESRF), 71 Avenue des Martyrs, F-38000 Grenoble, FranceDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, ItalyRemoval of highly toxic H<sub>2</sub>S for pollution control and operational safety is a pressing need. For this purpose, a montmorillonite intercalated with Cu(II)-phenanthroline complex [Cu[(Phen)(H<sub>2</sub>O)<sub>2</sub>]<sup>2+</sup> (Mt-CuPhen) was prepared to capture gaseous H<sub>2</sub>S under mild conditions. This hybrid material was simple to obtain and demonstrated an outstanding ability to entrap H<sub>2</sub>S at room temperature, retaining high efficiency for a very long time (up to 36.8 g of S/100 g Mt-CuPhen after 3 months of exposure). Sorbent and H<sub>2</sub>S uptake were investigated by elemental analysis, X-ray powder diffraction measurements, diffuse reflectance (DR) UV–Vis and infrared spectroscopy, thermal analysis and evolved gas mass spectrometry, scanning electron microscopy equipped with energy-dispersive X-ray spectrometer, and X-ray absorption spectroscopy. The H<sub>2</sub>S capture was studied over time and a mechanism of action was proposed. The entrapping involves a catalytic mechanism in which [Cu[(Phen)(H<sub>2</sub>O)<sub>2</sub>]<sup>2+</sup> acts as catalyst for H<sub>2</sub>S oxidation to S<sup>0</sup> by atmospheric oxygen. The low cost and the long-lasting performance for H<sub>2</sub>S removal render Mt-CuPhen an extremely appealing trap for H<sub>2</sub>S removal and a promising material for many technological applications.https://www.mdpi.com/2075-163X/10/6/510layer silicatesclay mineralsmontmorillonitecopperhydrogen sulfidecatalytic oxidation |
| spellingShingle | Elena Castellini Fabrizio Bernini Lorenzo Sebastianelli Claro Ignacio Sainz-Díaz Aida Serrano German R. Castro Daniele Malferrari Maria Franca Brigatti Marco Borsari Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite Minerals layer silicates clay minerals montmorillonite copper hydrogen sulfide catalytic oxidation |
| title | Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite |
| title_full | Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite |
| title_fullStr | Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite |
| title_full_unstemmed | Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite |
| title_short | Interlayer-Confined Cu(II) Complex as an Efficient and Long-Lasting Catalyst for Oxidation of H<sub>2</sub>S on Montmorillonite |
| title_sort | interlayer confined cu ii complex as an efficient and long lasting catalyst for oxidation of h sub 2 sub s on montmorillonite |
| topic | layer silicates clay minerals montmorillonite copper hydrogen sulfide catalytic oxidation |
| url | https://www.mdpi.com/2075-163X/10/6/510 |
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