Back to Search
Start Over
Effects of the ZrO 2 Crystalline Phase and Morphology on the Thermocatalytic Decomposition of Dimethyl Methylphosphonate.
- Source :
- Nanomaterials (2079-4991); Apr2024, Vol. 14 Issue 7, p611, 14p
- Publication Year :
- 2024
-
Abstract
- Thermocatalytic decomposition is an efficient purification technology that is potentially applicable to degrading chemical warfare agents and industrial toxic gases. In particular, ZrO<subscript>2</subscript> has attracted attention as a catalyst for the thermocatalytic decomposition of dimethyl methylphosphonate (DMMP), which is a simulant of the nerve gas sarin. However, the influence of the crystal phase and morphology on the catalytic performance of ZrO<subscript>2</subscript> requires further exploration. In this study, monoclinic- and tetragonal-phase ZrO<subscript>2</subscript> (m- and t-ZrO<subscript>2</subscript>, respectively) with nanoparticle, flower-like shape and hollow microsphere morphologies were prepared via hydrothermal and solvothermal methods, and their thermocatalytic decomposition of DMMP was systematically investigated. For a given morphology, m-ZrO<subscript>2</subscript> performed better than t-ZrO<subscript>2</subscript>. For a given crystalline phase, the morphology of hollow microspheres resulted in the longest protection time. The exhaust gases generated by the thermocatalytic decomposition of DMMP mainly comprised H<subscript>2</subscript>, CO<subscript>2</subscript>, H<subscript>2</subscript>O and CH<subscript>3</subscript>OH, and the by-products were phosphorus oxide species. Thus, the deactivation of ZrO<subscript>2</subscript> was attributed to the deposition of these phosphorous oxide species on the catalyst surface. These results are expected to help guide the development of catalysts for the safe disposal of chemical warfare agents. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 14
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 176596847
- Full Text :
- https://doi.org/10.3390/nano14070611