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Green One-Step Synthesis of Catalytically Active Palladium Nanoparticles Supported on Cellulose Nanocrystals.

Rezayat, Marzieh, Blundell, Rebecca K., Camp, Jason, Walsh, Darren A. and Thielemans, Wim. (2014) Green One-Step Synthesis of Catalytically Active Palladium Nanoparticles Supported on Cellulose Nanocrystals. ACS Sustainable Chemistry & Engineering, 2 (5). pp. 1241-1250. ISSN 2168-0485

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Abstract

Palladium nanoparticles (PdNPs) supported on cellulose nanocrystals (CNXL) were synthesized in a single step from Pd(hexafluoroacetylacetonate)2 (Pd(hfac)2) in subcrit. and supercrit. carbon dioxide. CNXLs acted as both the reducing agent and support material for the obtained nanoparticles. Dry Pd nanoparticles supported on the cellulose nanocrystals (PdNP@CNXL) were obtained by simply venting the CO2 and were characterized by FT-IR, XPS, powder X-ray diffraction (XRD), thermogravimetric anal. (TGA), and transmission electron microscopy (TEM). The results show that the Pd nanoparticle diams. varied between 6 and 13 nm with varying pressure (240-2200 psi), reaction time (2-17 h), and wt. ratio of the precursor Pd(hfac)2 to CNXL (1-4% wt./wt.). Particles with diams. above 13 nm appeared not to remain attached to the CNXL surface. Reaction conditions also affected the Pd loading in the final PdNP@CNXL composite. Finally, the PdNP@CNXL composites were shown to be effective catalysts for carbon-carbon bond formation in the Mizoroki-Heck cross-coupling reaction, in line with other reports. [on SciFinder(R)]

Item Type: Article
Additional Information: Unmapped bibliographic data: PY - 2014/// [EPrints field already has value set] M3 - 10.1021/sc500079q [Field not mapped to EPrints] JA - ACS Sustainable Chem. Eng. [Field not mapped to EPrints]
Uncontrolled Keywords: palladium nanoparticle supported cellulose nanocrystal
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Schools: School of Applied Sciences
Related URLs:
Depositing User: Sara Taylor
Date Deposited: 11 Nov 2014 13:45
Last Modified: 11 Nov 2014 13:45
URI: http://eprints.hud.ac.uk/id/eprint/22267

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