Magnetically recyclable nanocatalysts based on magnetite: an environmentally friendly and recyclable catalyst for esterification reactions

Autor: Vannia Cristina dos Santos-Durndell, Tailor Machado Peruzzolo, Geani Maria Ucoski, Luiz Pereira Ramos, Shirley Nakagaki

Publikováno v: Biofuel Research Journal, Vol 5, Iss 2, Pp 806-812 (2018)

Solid magnetic nanoparticles (magnetite = Mag) composed of Fe3O4 and magnetite coated with silica (Fe3O4/SiO2 = Mag/Si) were prepared from inexpensive starting materials. The catalytic activity of the solids was investigated for palmitic acid esterif

Externí odkaz: https://doaj.org/article/ec6dd51ac79c4f3386f3914f01acfb5e

Citrate-mediated sol–gel synthesis of Al-substituted sulfated zirconia catalysts for α-pinene isomerization

Autor: Lee J. Durndell, Abdallah I.M. Rabee, Gamal A.H. Mekhemer, Mark A. Isaacs, Mohamed I. Zaki, Nasr E. Fouad, Lucia Frattini, Karen Wilson, Adam F. Lee, Vannia Cristina dos Santos

Publikováno v: Molecular Catalysis. 458:206-212

Solid acids are desirable heterogeneous catalysts for green chemistry, with zirconia and its sulfated analogues offering tunable Lewis/Bronsted character. A new route to sulfated ZrO2, and Al-substituted ZrO2 (SO4/AlxZrO2), via carbonization and calc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::161da046d654c95d106729b64b7d0d55
https://doi.org/10.1016/j.mcat.2017.10.029

Nb2O5/SBA-15 catalyzed propanoic acid esterification

Autor: Vannia Cristina dos Santos, Ana Carolina Cons Bacilla, Ângela Taís Mattei da Silva, Adam F. Lee, Karen Wilson, Karen Mary Mantovani, Shirley Nakagaki

Publikováno v: Applied Catalysis B: Environmental. 205:498-504

A family of niobia (Nb2O5) functionalized SBA-15 solid catalysts have been prepared via wet impregnation with NbCl5 (2–32 wt% Nb) and subsequent thermal processing, for application in the acid catalyzed esterification of propanoic acid with methano

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8afe92305d610e333ed415916c570dfb
https://doi.org/10.1016/j.apcatb.2016.12.066

Heterogeneous/homogeneous esterification reaction catalyzed by a solid based on a vanadium salt

Autor: Shirley Nakagaki, Ângela Taís Mattei da Silva, Alesandro Bail, Noemi Nagata, Ana Carolina Cons Bacilla, Marianne Roque de Freitas, Katia J. Ciuffi, Liziane Marçal, Vannia Cristina dos Santos

Publikováno v: Journal of Molecular Catalysis A: Chemical. 422:221-233

In this work a vanadium(III)-based catalyst was synthesized, characterized by thermogravimetric analysis, electron paramagnetic resonance (EPR), powder X-ray diffraction (PXRD) and FTIR spectroscopy, and its activity was evaluated during fatty acids

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::600acb80c1e9b6911ea58e1e80ebff97
https://doi.org/10.1016/j.molcata.2015.12.018

A new application for transition metal chalcogenides:WS2 catalysed esterification of carboxylic acids

Autor: Vannia Cristina dos Santos, Adam F. Lee, Karen Wilson, Mark A. Isaacs, Christopher M. A. Parlett, Lee J. Durndell

Publikováno v: dos Santos, V C, Durndell, L J, Isaacs, M A, Parlett, C M A, Wilson, K & Lee, A F 2017, ' A new application for transition metal chalcogenides : WS 2 catalysed esterification of carboxylic acids ', Catalysis Communications, vol. 91, pp. 16-20 . https://doi.org/10.1016/j.catcom.2016.12.003

The first application of WS2, a well-known graphene analogue, as a solid acid catalyst for carboxylic acid esterification is reported. WS2 exhibits excellent specific activities and high conversion to methyl esters of (65–90%) for C2–C16 carboxyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84e11ca6d4172f18433fbe273c50c036
https://doi.org/10.1016/j.catcom.2016.12.003