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Nitroarene and dye reduction with 2:1 Co/Al layered double hydroxide catalysts – Is gold still necessary?
Nitroarene and dye reduction with 2:1 Co/Al layered double hydroxide catalysts – Is gold still necessary?
- Source :
- Inorganica Chimica Acta. 521:120336
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- A 2:1 Co/Al layered double hydroxide (LDH) material was synthesized with Cl– anions intercalated and then anion exchanged with deprotonated methionine. This allowed further immobilization of Au nanoparticles. The catalytic performance of the set of three LDH materials for comparative benchmarking was assessed in the aqueous reduction of nitroaromatic compounds and of rhodamine dyes in the presence of NaBH4. All catalysts were found to be very active for the nitro-to-amine reduction. The same was observed for the dyes, where reduction rhodamine 6G was faster than that of rhodamine B, for all catalysts. While the Au-containing catalyst was apparently the one showing the best catalytic activity the LDH with Cl– was found to follow it closely in terms of catalytic performance. In addition, while the LDH catalyst with Au was prone to deactivation by amine products in recycling experiments, the LDH catalyst with Cl– was almost insensitive to that, which is a large advantage. These results showed that using a catalyst based on first-row metals for efficient processes is possible and addresses current sustainable and environmental concerns.
- Subjects :
- Aqueous solution
010405 organic chemistry
Chemistry
Inorganic chemistry
Hydrotalcite
Nanoparticle
Reduction catalysis
010402 general chemistry
01 natural sciences
0104 chemical sciences
Catalysis
Inorganic Chemistry
Rhodamine 6G
Rhodamine
chemistry.chemical_compound
Sustainability
Materials Chemistry
Rhodamine B
Gold nanoparticles
Hydroxide
Amine gas treating
Nitroaromatic compounds
Physical and Theoretical Chemistry
Dyes
Subjects
Details
- ISSN :
- 00201693
- Volume :
- 521
- Database :
- OpenAIRE
- Journal :
- Inorganica Chimica Acta
- Accession number :
- edsair.doi.dedup.....efa0a0c5e87aa0cd406c5607441a9a04
- Full Text :
- https://doi.org/10.1016/j.ica.2021.120336