An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide
WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> (W<sub>x</sub>V<sub>5</sub>TiO<sub>2</sub>) catalysts were prepared via a wet incipient method with a V/Ti mass ratio = 0.05 and a W/Ti mass ratio varying fro...
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2025-06-01
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| author | Gaytri Sharma Endalkachew Sahle-Demessie Catherine B. Almquist |
| author_facet | Gaytri Sharma Endalkachew Sahle-Demessie Catherine B. Almquist |
| author_sort | Gaytri Sharma |
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| description | WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> (W<sub>x</sub>V<sub>5</sub>TiO<sub>2</sub>) catalysts were prepared via a wet incipient method with a V/Ti mass ratio = 0.05 and a W/Ti mass ratio varying from 0 to 0.10. The catalysts were calcined in air for 24 h at temperatures of 400 °C, 500 °C, 550 °C, and 600 °C. The presence of WO<sub>3</sub> on W<sub>x</sub>V<sub>5</sub>TiO<sub>2</sub> catalysts inhibits morphological and crystal structure transformations as the calcination temperature increases from 400 °C to 600 °C. The results of this study give evidence that the active component of the catalyst is V on anatase TiO<sub>2</sub>. Therefore, the incorporation of WO<sub>3</sub> onto an anatase TiO<sub>2</sub> support widens the temperature range at which the WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalyst maintains the anatase crystal structure and, hence, the performance of the catalyst. The catalytic oxidation of dimethyl sulfide (DMS) was used as a probe reaction to evaluate catalytic activity. The results indicate that WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalysts are capable of effectively oxidizing DMS at relatively low reaction temperatures (250 °C), even under conditions of an elevated DMS concentration in air (1.6 vol%). |
| format | Article |
| id | doaj-art-e2ddfe2b236043a7a8a25b4d69eae5c0 |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-e2ddfe2b236043a7a8a25b4d69eae5c02025-08-20T03:46:38ZengMDPI AGMolecules1420-30492025-06-013011243610.3390/molecules30112436An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl SulfideGaytri Sharma0Endalkachew Sahle-Demessie1Catherine B. Almquist2Chemical, Paper, Biomedical Engineering Department, Miami University, Oxford, OH 45056, USAUS Environmental Protection Agency, Cincinnati, OH 45220, USAChemical, Paper, Biomedical Engineering Department, Miami University, Oxford, OH 45056, USAWO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> (W<sub>x</sub>V<sub>5</sub>TiO<sub>2</sub>) catalysts were prepared via a wet incipient method with a V/Ti mass ratio = 0.05 and a W/Ti mass ratio varying from 0 to 0.10. The catalysts were calcined in air for 24 h at temperatures of 400 °C, 500 °C, 550 °C, and 600 °C. The presence of WO<sub>3</sub> on W<sub>x</sub>V<sub>5</sub>TiO<sub>2</sub> catalysts inhibits morphological and crystal structure transformations as the calcination temperature increases from 400 °C to 600 °C. The results of this study give evidence that the active component of the catalyst is V on anatase TiO<sub>2</sub>. Therefore, the incorporation of WO<sub>3</sub> onto an anatase TiO<sub>2</sub> support widens the temperature range at which the WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalyst maintains the anatase crystal structure and, hence, the performance of the catalyst. The catalytic oxidation of dimethyl sulfide (DMS) was used as a probe reaction to evaluate catalytic activity. The results indicate that WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalysts are capable of effectively oxidizing DMS at relatively low reaction temperatures (250 °C), even under conditions of an elevated DMS concentration in air (1.6 vol%).https://www.mdpi.com/1420-3049/30/11/2436WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalystsmorphologyDMS oxidation |
| spellingShingle | Gaytri Sharma Endalkachew Sahle-Demessie Catherine B. Almquist An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide Molecules WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalysts morphology DMS oxidation |
| title | An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide |
| title_full | An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide |
| title_fullStr | An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide |
| title_full_unstemmed | An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide |
| title_short | An Investigation of WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> Catalysts: Effects of WO<sub>3</sub> on Morphology, Thermal Stability, and Activity for the Catalytic Oxidation of Dimethyl Sulfide |
| title_sort | investigation of wo sub 3 sub v sub 2 sub o sub 5 sub tio sub 2 sub catalysts effects of wo sub 3 sub on morphology thermal stability and activity for the catalytic oxidation of dimethyl sulfide |
| topic | WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalysts morphology DMS oxidation |
| url | https://www.mdpi.com/1420-3049/30/11/2436 |
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