Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub>
Efficient utilization of visible light for photocatalytic hydrogen production is one of the most important issues to address. This report describes a facile approach to immobilize visible-light sensitizers on TiO<sub>2</sub> surfaces. To effectively utilize the sensitization of Sn(IV) po...
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MDPI AG
2022-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/12/3770 |
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| author | Sung-Hyun Kim Hee-Joon Kim |
| author_facet | Sung-Hyun Kim Hee-Joon Kim |
| author_sort | Sung-Hyun Kim |
| collection | DOAJ |
| description | Efficient utilization of visible light for photocatalytic hydrogen production is one of the most important issues to address. This report describes a facile approach to immobilize visible-light sensitizers on TiO<sub>2</sub> surfaces. To effectively utilize the sensitization of Sn(IV) porphyrin species for photocatalytic hydrogen production, perfluorosulfonate polymer (Nafion) matrix coated-TiO<sub>2</sub> was fabricated. Nafion coated-TiO<sub>2</sub> readily adsorbed <i>trans</i>-diaqua[<i>meso</i>-tetrakis(4-pyridinium)porphyrinato]tin(IV) cation [(TPy<i><sup>H</sup></i>P)Sn(OH<sub>2</sub>)<sub>2</sub>]<sup>6+</sup> via an ion-exchange process. The uptake of [(TPy<i><sup>H</sup></i>P)Sn(OH<sub>2</sub>)<sub>2</sub>]<sup>6+</sup> in an aqueous solution completed within 30 min, as determined by UV-vis spectroscopy. The existence of Sn(IV) porphyrin species embedded in the Nafion matrix coated on TiO<sub>2</sub> was confirmed by zeta potential measurements, UV-vis absorption spectroscopy, TEM combined with energy dispersive X-ray spectroscopy, and thermogravimetric analysis. Sn(IV)-porphyrin cationic species embedded in the Nafion matrix were successfully used as visible-light sensitizer for photochemical hydrogen generation. This photocatalytic system performed 45% better than the uncoated TiO<sub>2</sub> system. In addition, the performance at pH 7 was superior to that at pH 3 or 9. This work revealed that Nafion matrix coated-TiO<sub>2</sub> can efficiently produce hydrogen with a consistent performance by utilizing a freshly supplied cationic Sn(IV)-porphyrin sensitizer in a neutral solution. |
| first_indexed | 2024-03-09T22:55:47Z |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T22:55:47Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-04ac46ea1b3e4d4a915a5d42ecb6b65c2023-11-23T18:10:56ZengMDPI AGMolecules1420-30492022-06-012712377010.3390/molecules27123770Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub>Sung-Hyun Kim0Hee-Joon Kim1Department of Chemistry and Bioscience, Kumoh National Institute of Technology, Gumi 39177, KoreaDepartment of Chemistry and Bioscience, Kumoh National Institute of Technology, Gumi 39177, KoreaEfficient utilization of visible light for photocatalytic hydrogen production is one of the most important issues to address. This report describes a facile approach to immobilize visible-light sensitizers on TiO<sub>2</sub> surfaces. To effectively utilize the sensitization of Sn(IV) porphyrin species for photocatalytic hydrogen production, perfluorosulfonate polymer (Nafion) matrix coated-TiO<sub>2</sub> was fabricated. Nafion coated-TiO<sub>2</sub> readily adsorbed <i>trans</i>-diaqua[<i>meso</i>-tetrakis(4-pyridinium)porphyrinato]tin(IV) cation [(TPy<i><sup>H</sup></i>P)Sn(OH<sub>2</sub>)<sub>2</sub>]<sup>6+</sup> via an ion-exchange process. The uptake of [(TPy<i><sup>H</sup></i>P)Sn(OH<sub>2</sub>)<sub>2</sub>]<sup>6+</sup> in an aqueous solution completed within 30 min, as determined by UV-vis spectroscopy. The existence of Sn(IV) porphyrin species embedded in the Nafion matrix coated on TiO<sub>2</sub> was confirmed by zeta potential measurements, UV-vis absorption spectroscopy, TEM combined with energy dispersive X-ray spectroscopy, and thermogravimetric analysis. Sn(IV)-porphyrin cationic species embedded in the Nafion matrix were successfully used as visible-light sensitizer for photochemical hydrogen generation. This photocatalytic system performed 45% better than the uncoated TiO<sub>2</sub> system. In addition, the performance at pH 7 was superior to that at pH 3 or 9. This work revealed that Nafion matrix coated-TiO<sub>2</sub> can efficiently produce hydrogen with a consistent performance by utilizing a freshly supplied cationic Sn(IV)-porphyrin sensitizer in a neutral solution.https://www.mdpi.com/1420-3049/27/12/3770hydrogen productionphotosensitizationSn(IV)-porphyrinNafionphotocatalyst |
| spellingShingle | Sung-Hyun Kim Hee-Joon Kim Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> Molecules hydrogen production photosensitization Sn(IV)-porphyrin Nafion photocatalyst |
| title | Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> |
| title_full | Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> |
| title_fullStr | Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> |
| title_full_unstemmed | Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> |
| title_short | Photocatalytic Hydrogen Production by the Sensitization of Sn(IV)-Porphyrin Embedded in a Nafion Matrix Coated on TiO<sub>2</sub> |
| title_sort | photocatalytic hydrogen production by the sensitization of sn iv porphyrin embedded in a nafion matrix coated on tio sub 2 sub |
| topic | hydrogen production photosensitization Sn(IV)-porphyrin Nafion photocatalyst |
| url | https://www.mdpi.com/1420-3049/27/12/3770 |
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