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TG/DTA and XRD study on structure and chemical transformation of the Cs–P–W oxides

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Abstract

In this paper, the thermoanalytical investigations on structure and chemical transformation of the Cs–P–W oxides are reported. The thermal decomposition and chemical transformations of solid Cs–P–W oxides prepared through evaporating the mixture solution containing a certain amount of Cs2CO3, (NH4)2HPO4 and (NH4)6PW7O24·6H2O were analyzed using the TG/DTA and X-ray diffraction during heating process at a rate of 5 °C min−1. The results showed that the W/Cs molar ratio significantly influences on the structure and chemical transformation of the Cs–P–W oxides. Besides, the influence of the support on the structure transformation is also investigated and found that the cesium tungsten oxides (CsW2O6) and cesium phosphotungstate salts (Cs x H3−x PW12O40) are formed on the surface of γ-Al2O3 and SiO2, respectively, due to different interactions of component with supports.

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Acknowledgements

This work was supported by the National Basic Research Program of China (2015CB251401); the National Natural Science Funds for Distinguished Young Scholar (No. 21425625); and National Science Fund for Excellent Young Scholars (21422607).

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Authors and Affiliations

  1. School of Engineering and Technology, China University of Geosciences, Beijing, 100083, People’s Republic of China

    Guoliang Zhang & Zhijian Peng

  2. Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Guoliang Zhang, Hui Wu & Chunshan Li

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  1. Guoliang Zhang
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Correspondence to Zhijian Peng or Chunshan Li.

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Zhang, G., Wu, H., Peng, Z. et al. TG/DTA and XRD study on structure and chemical transformation of the Cs–P–W oxides. J Therm Anal Calorim 128, 947–956 (2017). https://doi.org/10.1007/s10973-016-5990-9

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  • DOI: https://doi.org/10.1007/s10973-016-5990-9

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