Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub>
In this work, the influences of the Ar flow-rate and sublimation temperature on the phase composition and morphological structure of the sublimation products of analytical reagent MoO<sub>3</sub> are investigated. The results show that the sublimation products are always composed of ther...
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| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/30/13/2751 |
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| author | Feng-Jiao Du Jian-Jun Yu Jian-Gang Liu Lu Wang |
| author_facet | Feng-Jiao Du Jian-Jun Yu Jian-Gang Liu Lu Wang |
| author_sort | Feng-Jiao Du |
| collection | DOAJ |
| description | In this work, the influences of the Ar flow-rate and sublimation temperature on the phase composition and morphological structure of the sublimation products of analytical reagent MoO<sub>3</sub> are investigated. The results show that the sublimation products are always composed of thermodynamically stable orthorhombic molybdenum trioxide (α-MoO<sub>3</sub>) and metastable monoclinic molybdenum trioxide (β-MoO<sub>3</sub>) under different reaction conditions, among which the proportion of β-MoO<sub>3</sub> gradually increases with the increase in Ar flow-rate and the decrease in sublimation temperature. The formation temperature of α-MoO<sub>3</sub> is mainly between 780 K and 847 K, with the particles exhibiting an obvious sheet-like morphology. This work also finds that β-MoO<sub>3</sub> is mainly generated below 500 K; however, due to the co-actions of the deposition of gaseous MoO<sub>3</sub> molecules, the adsorption of Ar molecules, and the collision effect between the different particles, the newly formed β-MoO<sub>3</sub> is more inclined to take a spherical-shaped morphology in order to maintain its lowest energy state. |
| format | Article |
| id | doaj-art-20d384ade877447f860b70313f3a67fd |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-20d384ade877447f860b70313f3a67fd2025-08-20T03:28:28ZengMDPI AGMolecules1420-30492025-06-013013275110.3390/molecules30132751Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub>Feng-Jiao Du0Jian-Jun Yu1Jian-Gang Liu2Lu Wang3College of Mechanical and Electrical Engineering, Wuyi University, Wuyishan 354300, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, ChinaCollege of Mechanical and Electrical Engineering, Wuyi University, Wuyishan 354300, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, ChinaIn this work, the influences of the Ar flow-rate and sublimation temperature on the phase composition and morphological structure of the sublimation products of analytical reagent MoO<sub>3</sub> are investigated. The results show that the sublimation products are always composed of thermodynamically stable orthorhombic molybdenum trioxide (α-MoO<sub>3</sub>) and metastable monoclinic molybdenum trioxide (β-MoO<sub>3</sub>) under different reaction conditions, among which the proportion of β-MoO<sub>3</sub> gradually increases with the increase in Ar flow-rate and the decrease in sublimation temperature. The formation temperature of α-MoO<sub>3</sub> is mainly between 780 K and 847 K, with the particles exhibiting an obvious sheet-like morphology. This work also finds that β-MoO<sub>3</sub> is mainly generated below 500 K; however, due to the co-actions of the deposition of gaseous MoO<sub>3</sub> molecules, the adsorption of Ar molecules, and the collision effect between the different particles, the newly formed β-MoO<sub>3</sub> is more inclined to take a spherical-shaped morphology in order to maintain its lowest energy state.https://www.mdpi.com/1420-3049/30/13/2751β-MoO<sub>3</sub>α-MoO<sub>3</sub>ArSublimation temperatureformation mechanism |
| spellingShingle | Feng-Jiao Du Jian-Jun Yu Jian-Gang Liu Lu Wang Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> Molecules β-MoO<sub>3</sub> α-MoO<sub>3</sub> Ar Sublimation temperature formation mechanism |
| title | Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> |
| title_full | Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> |
| title_fullStr | Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> |
| title_full_unstemmed | Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> |
| title_short | Influences of Ar Flow-Rate and Sublimation Temperature on the Sublimation Product of Analytical Reagent MoO<sub>3</sub> |
| title_sort | influences of ar flow rate and sublimation temperature on the sublimation product of analytical reagent moo sub 3 sub |
| topic | β-MoO<sub>3</sub> α-MoO<sub>3</sub> Ar Sublimation temperature formation mechanism |
| url | https://www.mdpi.com/1420-3049/30/13/2751 |
| work_keys_str_mv | AT fengjiaodu influencesofarflowrateandsublimationtemperatureonthesublimationproductofanalyticalreagentmoosub3sub AT jianjunyu influencesofarflowrateandsublimationtemperatureonthesublimationproductofanalyticalreagentmoosub3sub AT jiangangliu influencesofarflowrateandsublimationtemperatureonthesublimationproductofanalyticalreagentmoosub3sub AT luwang influencesofarflowrateandsublimationtemperatureonthesublimationproductofanalyticalreagentmoosub3sub |