Autor(es): Gaglieri, Caroline [UNESP] ; Alarcon, Rafael T. [UNESP] ; de Moura, Aniele [UNESP] ; Caires, Flávio J. [UNESP]
Data: 2019
Identificador Persistente: http://hdl.handle.net/11449/187927
Origem: Oasisbr
Assunto(s): Characterization; Color change; Nickel selenate hexahydrate; Thermal properties
Made available in DSpace on 2019-10-06T15:51:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01
This work aims to determine the nickel selenate hexahydrate thermal behavior by simultaneous thermogravimetry–differential thermal analysis and differential scanning calorimetry and characterize its thermal intermediates decomposition. Moreover, at 25 °C, this material is a green-colored compound; however, with the temperature increase (until 420 °C), a color change from yellowish green to yellowish orange and finally to yellow was observed. This characteristic is due to the water molecules release, changing the ultraviolet–visible/near-infrared spectroscopy analysis absorption spectra and consequently modifying the crystal structure, as confirmed by X-ray powder diffraction, and resulting in visual changes in photo-DSC. The new data are essential to determine the better conditions to use this material as a precursor in synthesis and also to use it in future applications.
UNESP-São Paulo State University Chemistry Department School of Sciences
UNESP-São Paulo State University Institute of Chemistry
UNESP-São Paulo State University Chemistry Department School of Sciences
UNESP-São Paulo State University Institute of Chemistry
