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Physical and chemical characterization of cerium(IV) oxide nanoparticles

DOI: 10.1007/s00216-016-9771-x DOI Help

Authors: Gemma Cepriá (Analytical Spectroscopy and Sensors Group (GEAS), Environmental Sciences Institute (IUCA), Analytical Chemistry Department, University of Zaragoza) , Walvin R. Córdova (Analytical Spectroscopy and Sensors Group (GEAS), Environmental Sciences Institute (IUCA), Analytical Chemistry Department, University of Zaragoza) , Oscar Céspedes (School of Physics and Astronomy, University of Leeds,) , Laura Sánchez-garcía (Analytical Spectroscopy and Sensors Group (GEAS), Environmental Sciences Institute (IUCA), Analytical Chemistry Department, University of Zaragoza) , Pilar Ferrer Escorihuela (Diamond Light Source) , Diego Gianolio (Diamond Light Source) , Juan R. Castillo (Analytical Spectroscopy and Sensors Group (GEAS), Environmental Sciences Institute (IUCA), Analytical Chemistry Department, University of Zaragoza)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Analytical And Bioanalytical Chemistry , VOL 408 , PAGES 6589 - 6598

State: Published (Approved)
Published: July 2016
Diamond Proposal Number(s): 11695

Abstract: Chemical composition, size and structure of the nanoparticle are required to describe nanoceria. Nanoparticles of similar size and Ce(III) content might exhibit different chemical behaviour due to their differences in structure. A simple and direct procedure based on affordable techniques for all the laboratories is presented in this paper. The combination of Raman and UV-vis spectroscopy and particle impact coulometry (PIC) allows the characterization of nanoceria of small size from 4 to 65 nm at a concentration from micromolar to nanomolar, a concentration range suitable for the analysis of lab-prepared or commercial nanoparticle suspensions, but too high for most analytical purposes aimed at nanoparticle monitoring. While the PIC limits of size detection are too high to observe small nanoparticles unless catalytic amplification is used, the method provides a simple means to study aggregation of nanoparticles in the media they are needed to be dispersed for each application. Raman spectroscopy provided information about structure of the nanoparticle, and UV-vis about their chemical behaviour against some common reducing and oxidizing agents.

Journal Keywords: Nanoceria, Chemical behaviour, Raman, Particle impact coulometry, XAS

Subject Areas: Chemistry


Instruments: B18-Core EXAFS