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A study on the synthesis and characterisation of nanocrystalline transition metal oxynitrides

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Abstract

A different processing route to bimetallic oxynitrides has been developed using oxide precursors generated from coprecipitation of ethanolic solutions of the relevant metal chlorides. The nitridation of the mixed-metal precursors yields nanocrystalline oxynitrides. Representative group 5–group 6 transition metal oxynitrides, M1−xM′x(O,N) (M = Nb, Ta; M′ = Mo, W) have been prepared and characterised by powder X-ray diffraction (PXD), scanning electron microscopy with energy dispersive analysis by X-rays (SEM/EDAX), transmission electron microscopy (TEM) with selected area electron diffraction (SAED), BET surface area measurements and SQUID magnetometry. The mixed-metal oxynitrides form rock salt structures (a ∼4.3 Å) with disordered distributions of both cations and anions. The purity, particle size and surface area of materials are significantly dependent on nitridation temperature.

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Acknowledgements

The authors would like to Ms N Bock and Dr FJ Allison for assistance with SEM and TEM measurements. DHG and WY would like to thank the Royal Society for awarding WY a Sino-British Fellowship and for funding this work. DHG would also like to thank the EPSRC for the award of an Advanced Research Fellowship.

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Authors and Affiliations

  1. Department of Chemical Engineering, Shanghai Institute of Technology, 200235, Shanghai, P.R. China

    Yuhong Wang

  2. School of Chemical, Environmental and Mining Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

    Edward Lesterb

  3. School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, UK

    Duncan H. Gregory

Authors
  1. Yuhong Wang
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  2. Edward Lesterb
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  3. Duncan H. Gregory
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Correspondence to Yuhong Wang.

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Wang, Y., Lesterb, E. & Gregory, D.H. A study on the synthesis and characterisation of nanocrystalline transition metal oxynitrides . J Mater Sci 42, 6779–6786 (2007). https://doi.org/10.1007/s10853-006-1464-y

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  • DOI: https://doi.org/10.1007/s10853-006-1464-y

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