TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features
Hybrids containing approximately equal amounts of P25 TiO<sub>2</sub> and S-doped porous carbons were prepared using a water-based slurry mixing method. The materials were extensively characterized by adsorption of nitrogen, potentiometric titration, thermal analysis in air and in helium...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/24/19/3585 |
| _version_ | 1818946613223096320 |
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| author | Teresa J. Bandosz Alfonso Policicchio Marc Florent Po S. Poon Juan Matos |
| author_facet | Teresa J. Bandosz Alfonso Policicchio Marc Florent Po S. Poon Juan Matos |
| author_sort | Teresa J. Bandosz |
| collection | DOAJ |
| description | Hybrids containing approximately equal amounts of P25 TiO<sub>2</sub> and S-doped porous carbons were prepared using a water-based slurry mixing method. The materials were extensively characterized by adsorption of nitrogen, potentiometric titration, thermal analysis in air and in helium, XRD, XPS and SEM. The collected results showed the significant blockage of carbon micropores by TiO<sub>2</sub> particles deposited on their outer surface. The formation of a new interface, especially for the S-rich samples, might also contribute to the porosity alteration. Analysis of surface chemistry suggested the presence of Ti-S bonds with an involvement of sulfur from thiophenic species in the carbon phase. The latter, especially when polymer-derived, was mainly deposited on the TiO<sub>2</sub> nanoparticles. Formation of Ti-S stabilized sulfur and increased the ignition temperature of the hybrids, especially those with a high content of sulfur, in comparison with the ignition temperature of carbons. The surfaces of hybrid with S-containing carbons was also thermally very stable and of basic chemical nature. The formation of interfacial structures Ti-C was detected by XPS analysis suggesting a partial reduction of the Ti. |
| first_indexed | 2024-12-20T08:17:47Z |
| format | Article |
| id | doaj.art-3f2f2ea3a2874d5ea20f2e86668d0a10 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-20T08:17:47Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-3f2f2ea3a2874d5ea20f2e86668d0a102022-12-21T19:47:05ZengMDPI AGMolecules1420-30492019-10-012419358510.3390/molecules24193585molecules24193585TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface FeaturesTeresa J. Bandosz0Alfonso Policicchio1Marc Florent2Po S. Poon3Juan Matos4Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031, USADepartment of Chemistry and Biochemistry, The City College of New York, New York, NY 10031, USADepartment of Chemistry and Biochemistry, The City College of New York, New York, NY 10031, USAUnidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, 403000 Concepción, ChileUnidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, 403000 Concepción, ChileHybrids containing approximately equal amounts of P25 TiO<sub>2</sub> and S-doped porous carbons were prepared using a water-based slurry mixing method. The materials were extensively characterized by adsorption of nitrogen, potentiometric titration, thermal analysis in air and in helium, XRD, XPS and SEM. The collected results showed the significant blockage of carbon micropores by TiO<sub>2</sub> particles deposited on their outer surface. The formation of a new interface, especially for the S-rich samples, might also contribute to the porosity alteration. Analysis of surface chemistry suggested the presence of Ti-S bonds with an involvement of sulfur from thiophenic species in the carbon phase. The latter, especially when polymer-derived, was mainly deposited on the TiO<sub>2</sub> nanoparticles. Formation of Ti-S stabilized sulfur and increased the ignition temperature of the hybrids, especially those with a high content of sulfur, in comparison with the ignition temperature of carbons. The surfaces of hybrid with S-containing carbons was also thermally very stable and of basic chemical nature. The formation of interfacial structures Ti-C was detected by XPS analysis suggesting a partial reduction of the Ti.https://www.mdpi.com/1420-3049/24/19/3585s-doped carbontio<sub>2</sub>hybridssurface chemistryporosityinterface |
| spellingShingle | Teresa J. Bandosz Alfonso Policicchio Marc Florent Po S. Poon Juan Matos TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features Molecules s-doped carbon tio<sub>2</sub> hybrids surface chemistry porosity interface |
| title | TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features |
| title_full | TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features |
| title_fullStr | TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features |
| title_full_unstemmed | TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features |
| title_short | TiO<sub>2</sub>/S-Doped Carbons Hybrids: Analysis of Their Interfacial and Surface Features |
| title_sort | tio sub 2 sub s doped carbons hybrids analysis of their interfacial and surface features |
| topic | s-doped carbon tio<sub>2</sub> hybrids surface chemistry porosity interface |
| url | https://www.mdpi.com/1420-3049/24/19/3585 |
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