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Tracking the Formation of Nano-sized Zinc Oxide from Zinc Peroxide by In Situ XAS and XRD

DOI: 10.1088/1742-6596/430/1/012080 DOI Help

Authors: T. Daley (University College London) , E. Raj (Johnson Matthey Technology Centre) , S. Ramos (Diamond Light Source) , G. Cibin (Diamond Light Source) , A. Dent (Diamond Light Source Ltd) , T. I. Hyde (Johnson Matthey) , G. Sankar (University College London)
Co-authored by industrial partner: Yes

Type: Conference Paper
Conference: 15th International Conference on X-ray Absorption Fine Structure (XAFS15)
Peer Reviewed: No

State: Published (Approved)
Published: April 2013

Abstract: In this paper we show how the formation of zinc oxide from zinc peroxide takes place during thermal decomposition, through a combination of X-ray Absorption Spectroscopy (XAS) and X-ray Diffraction (XRD). The time-resolved study allowed us to follow the changes in both the local structure of the material, in particular the conversion of octahedral Zn-O coordination to tetrahedral one through EXAFS and XANES analysis and at the same time the particle growth using both EXAFS and diffraction. Multi-cluster analysis provided information on the phase changes which could be cross-correlated with diffraction results which suggests an abrupt change in the long range coordination followed by a slow growth of zinc oxide NPs. This study allowed us to gain a detailed understanding of zinc peroxide decomposition leading to the formation of zinc oxide.

Journal Keywords: Absorption Spectroscopy; Fine Structure; Nanostructures; Particles; Peroxides; Pyrolysis; X-Ray Diffraction; X-Ray Spectroscopy; Zinc; Zinc Oxides

Subject Areas: Physics

Instruments: B18-Core EXAFS

Added On: 29/04/2013 09:37

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