Abstract
Silver dinitramide AgN(NO2)2 was prepared, and its structure was characterized by UV–Visible absorption spectra, Fourier transform infrared (FT-IR) spectra and Fourier transform Raman spectra. Its thermal decomposition process was investigated by differential scanning calorimetry and thermogravimetric analysis coupled with the gas analysis by FT-IR (EGA-FT-IR). The intermediate and final products of thermal decomposition were analyzed by FT-IR, Raman spectra and X-ray diffraction. Kissinger method and Ozawa methods were used to calculate apparent activation energy E a, the pre-exponential constant lg A and linear correlation coefficient r. The results showed that the degradation process of AgN(NO2)2 could be divided into two stages. The first one with a mass loss of 21.86 % took place in 408–483 K, in which N2O was released and the intermediate product of thermal decomposition was AgNO3. The second stage with a mass loss of 28.24 % occurred in 483–800 K. In this process, gases NO2 and O2 were evolved and Ag was the final product of thermal decomposition. Kissinger method results: E a = 66.59 kJ mol−1, lg A = 7.21 min−1 and r = 0.9913. Ozawa method results: E a = 70.53 kJ mol−1, r = 0.9987.
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Acknowledgements
This work was supported by the National Science Foundation of China (No. 51372211), Youth Innovation Research Team of Sichuan for Carbon Nanomaterials (2011JTD0017) and Southwest University of Science and Technology Researching Project (13ZX9107, 14TDFK05).
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Chen, B., Jin, B., Peng, R. et al. The thermal decomposition of silver dinitramide AgN(NO2)2 . J Therm Anal Calorim 126, 1491–1498 (2016). https://doi.org/10.1007/s10973-016-5643-z
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DOI: https://doi.org/10.1007/s10973-016-5643-z