Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts
Here, we demonstrate the continuous synthesis of gallium nitride (GaN) nanophotocatalysts exhibiting high quantum confinement using a preheated supercritical millireactor. The GaN quantum dots (QDs) are obtained from the direct thermolysis of a single source amido complex precursor (tris(dimethyl)am...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821123000406 |
| _version_ | 1797832673511604224 |
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| author | Prasaanth Ravi Anusuyadevi Zachary S. Campbell Arnaud Erriguible Samuel Marre Cyril Aymonier |
| author_facet | Prasaanth Ravi Anusuyadevi Zachary S. Campbell Arnaud Erriguible Samuel Marre Cyril Aymonier |
| author_sort | Prasaanth Ravi Anusuyadevi |
| collection | DOAJ |
| description | Here, we demonstrate the continuous synthesis of gallium nitride (GaN) nanophotocatalysts exhibiting high quantum confinement using a preheated supercritical millireactor. The GaN quantum dots (QDs) are obtained from the direct thermolysis of a single source amido complex precursor (tris(dimethyl)amido gallium(III) dimer), in anhydrous supercritical cyclohexane. The quality of the synthesized QDs is highly dependent on the chemical pathways for the single source precursor thermolysis. Through the use of numerical modeling, we designed a millifluidic reactor allowing a sufficiently high heating rate for a direct precursor thermolysis towards efficient GaN nanoparticles. The as-designed preheated supercritical flow reactor yields highly reproducible GaN QDs (optical properties, crystallite phase and morphology) at high throughput, enabling gram scale production. Eventually, the photocatalytic properties of the GaN QDs were evaluated in a direct photochemical reaction through the degradation of a dye molecule (Methyl Orange). The obtained results demonstrate the higher photocatalytic activity of such photocatalysts compared to the commercially and reference available Degussa P25. |
| first_indexed | 2024-04-09T14:11:36Z |
| format | Article |
| id | doaj.art-0a6ffab5001345f7be31975b82b0dd23 |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-09T14:11:36Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-0a6ffab5001345f7be31975b82b0dd232023-05-06T04:39:17ZengElsevierChemical Engineering Journal Advances2666-82112023-05-0114100483Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalystsPrasaanth Ravi Anusuyadevi0Zachary S. Campbell1Arnaud Erriguible2Samuel Marre3Cyril Aymonier4Univ. Bordeaux, CNRS, Bordeaux INP, UMR5026, F-33600, FranceSchool of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr NW, Atlanta, GA, 30332 United States of AmericaUniv. Bordeaux, CNRS, Bordeaux INP, UMR5026, F-33600, FranceUniv. Bordeaux, CNRS, Bordeaux INP, UMR5026, F-33600, France; Corresponding authors.Univ. Bordeaux, CNRS, Bordeaux INP, UMR5026, F-33600, France; Corresponding authors.Here, we demonstrate the continuous synthesis of gallium nitride (GaN) nanophotocatalysts exhibiting high quantum confinement using a preheated supercritical millireactor. The GaN quantum dots (QDs) are obtained from the direct thermolysis of a single source amido complex precursor (tris(dimethyl)amido gallium(III) dimer), in anhydrous supercritical cyclohexane. The quality of the synthesized QDs is highly dependent on the chemical pathways for the single source precursor thermolysis. Through the use of numerical modeling, we designed a millifluidic reactor allowing a sufficiently high heating rate for a direct precursor thermolysis towards efficient GaN nanoparticles. The as-designed preheated supercritical flow reactor yields highly reproducible GaN QDs (optical properties, crystallite phase and morphology) at high throughput, enabling gram scale production. Eventually, the photocatalytic properties of the GaN QDs were evaluated in a direct photochemical reaction through the degradation of a dye molecule (Methyl Orange). The obtained results demonstrate the higher photocatalytic activity of such photocatalysts compared to the commercially and reference available Degussa P25.http://www.sciencedirect.com/science/article/pii/S2666821123000406Continuous flow synthesisChemical engineering for reactor designSupercritical fluidsGallium nitrideQuantum dotsNanophotocatalysts |
| spellingShingle | Prasaanth Ravi Anusuyadevi Zachary S. Campbell Arnaud Erriguible Samuel Marre Cyril Aymonier Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts Chemical Engineering Journal Advances Continuous flow synthesis Chemical engineering for reactor design Supercritical fluids Gallium nitride Quantum dots Nanophotocatalysts |
| title | Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts |
| title_full | Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts |
| title_fullStr | Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts |
| title_full_unstemmed | Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts |
| title_short | Supercritical millifluidic reactor for the synthesis of efficient GaN nanophotocatalysts |
| title_sort | supercritical millifluidic reactor for the synthesis of efficient gan nanophotocatalysts |
| topic | Continuous flow synthesis Chemical engineering for reactor design Supercritical fluids Gallium nitride Quantum dots Nanophotocatalysts |
| url | http://www.sciencedirect.com/science/article/pii/S2666821123000406 |
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