Thermal decomposition study of selected isopolymolybdates

• Published in: Journal of thermal analysis and calorimetry Vol. 96; no. 2; pp. 395 - 401
• Main Authors: Grzywa, M., Włodarczyk-Gajda, B., Łasocha, W.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.05.2009; Springer
• Subjects: Analytical Chemistry; Calorimetry; Chemistry; Chemistry and Materials Science; Crystallites; Decomposition; Diffraction; Exact sciences and technology; Inorganic Chemistry; Inorganic chemistry and origins of life; Measurement Science and Instrumentation; Molybdates; Phases; Physical Chemistry; Polymer Sciences; Preparations and properties; Salts; Thermal decomposition; X-rays; thermal decomposition; molybdates; powder X-ray diffraction; Scanning electron microscopy; Pyrolysis; Ammonium Compounds; Morphology; Thermogravimetry; Molybdenum Compounds; Thermal analysis; Molybdates; X ray diffraction; Surface structure
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-008-9207-8

The thermal decomposition of ammonium trimolybdate (NH 4 ) 2 Mo 3 O 10 ·H 2 O, anilinium trimolybdate (C 6 NH 8 ) 2 Mo 3 O 10 ·4H 2 O and anilinium pentamolybdate (C 6 NH 8 ) 2 Mo 5 O 16 in air and nitrogen has been investigated. The decomposition of molybdates was studied in situ by powder X-ray diffraction. Moreover, results of TG, as well as scanning microscopy studies, are presented. It was found that during thermal treatment in air phases of MoO x type are obtained, while thermal treatment in nitrogen leads to obtaining a mixture of Mo y C z and Mo p N q . It is worth noting that even though chemical decomposition and formation of new compounds took place, in some cases needle-like or plate-like shapes of crystallites were preserved during thermal treatment.