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Thermoanalytical investigation of the decomposition course of copper oxysalts

II. Copper (II) nitrate trihydrate

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Abstract

The thermal decomposition of copper nitrate trihydrate (CuNTH); Cu(NO3)2·3H2O was studied up to 600°C by thermogravimetry (TG) and differential thermal analysis (DTA) in a dynamic atmosphere of air. The thermal events occurring throughout the decomposition course were characterized on the basis of spectral analyses using infrared spectroscopy (IR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Non-isothermal kinetic parameters were determined. The results showed that the decomposition course involves two main processes, firstly the formation of hydroxy copper nitrate and secondly, the decomposition of this compound to yield CuO. Pathways were suggested that may be involved in the decomposition course.

Zusammenfassung

Mittels Thermogravimetrie (TG) und Differentialthermoanalyse (DTA) in dynamischer Luftatmosphäre wurde der thermische Zersetzungsweg von Kupfernitrattrihydrat (CuNTH); Cu(NO3)2·3H2O bis zu einer Temperatur von 600°C untersucht. Die während des Zersetzungsvorganges ablaufenden thermischen Ereignisse wurden auf der Grundlage von Spektralanalyse mittels Infrarotspektroskopie (IR), Röntgendiffraktion (XRD) und Scanning-Elektronenmikroskopie (SEM) charakterisiert. Nichtisotherme kinetische Parameter wurden ermittelt. Die Ergebnisse zeigten, daß die Zersetzung zwei Hauptprozesse umfaßt, als erstes die Bildung von Hydroxy-Kupfernitrat und zweitens, die Zersetzung dieser Verbindung zu CuO. Es wurde Wege vorgeschlagen, die bei dieser Zersetzung involviert sein können.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Minia University, El-Minia, Egypt

    S. A. A. Mansour

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  1. S. A. A. Mansour
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Mansour, S.A.A. Thermoanalytical investigation of the decomposition course of copper oxysalts. Journal of Thermal Analysis 45, 1381–1392 (1995). https://doi.org/10.1007/BF02547432

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  • DOI: https://doi.org/10.1007/BF02547432

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