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

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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Bibliographic Details
Main Authors:	Gaytri Sharma, Endalkachew Sahle-Demessie, Catherine B. Almquist
Format:	Article
Language:	English
Published:	MDPI AG 2025-06-01
Series:	Molecules
Subjects:	WO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>/TiO<sub>2</sub> catalysts morphology DMS oxidation
Online Access:	https://www.mdpi.com/1420-3049/30/11/2436
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Summary:	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%).
ISSN:	1420-3049