| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 1.72 MB | Adobe PDF |
Orientador(es)
Resumo(s)
3d metal (Cu, Fe, Co, V) containing composite catalysts for the solvent-free microwave-assisted trans-formation of 1-phenylethanol to acetophenone with tert-butyl hydroperoxide (TBHP) as oxidant wereprepared by ball milling. The influence of multiwalled carbon nanotubes (CNTs) and graphene oxide (GO)additives on the catalytic activity of the catalysts was studied. CNTs or GO were mixed by ball millingwith the metal salts (CoCl2), oxides (CuO, Fe2O3, V2O5) or binary systems (Fe2O3-CoCl2, CoCl2-V2O5, CuO-Fe2O3). For CoCl2-based catalytic systems, addition of small amounts (0.1–5%) of CNTs or GO leads tosignificant improvement in catalytic activity, e.g. 1% of the CNTs additive allows to rise yields from 28to 77%, under the same catalytic conditions. The CoCl2-5%CNTs composite is the most active among thestudied ones with 85% yield and TON of 43 after 1 h
Descrição
Palavras-chave
Carbonnanotubes Mechanochemistry Catalysis Oxidation Alcohols
Contexto Educativo
Citação
RIBEIRO, Ana Paula C.; [et al] – The influence of multiwalled carbon nanotubes and graphene oxide additives on the catalytic activity of 3d metal catalysts towards 1-phenylethanol oxidation. Journal of Molecular Catalysis A: Chemical. ISSN: 1381-1169. Vol. 426 (2017), pp. 557-563
Editora
Elsevier