Author(s): de Godoi Machado, Rafael [UNESP] ; Gaglieri, Caroline [UNESP] ; Alarcon, Rafael Turra [UNESP] ; de Moura, Aniele [UNESP] ; de Almeida, Amanda Cosmo [UNESP] ; Caires, Flávio Junior [UNESP] ; Ionashiro, Massao [UNESP]
Date: 2020
Persistent ID: http://hdl.handle.net/11449/201710
Origin: Oasisbr
Subject(s): Color dependence; Dehydration process; Selenate materials; Temperature effect
Made available in DSpace on 2020-12-12T02:39:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-07-01
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Several new materials based on selenates and selenites have been produced, characterized and their application have exhibited good results in several areas. As consequence, some selenates/selenites that had been synthetized in the past have been better characterized aiming to provide more information about their properties to be applied. Thus, this work aims to provide a deep investigation about cobalt selenate pentahydrate focusing in its thermal behavior and in the properties of its thermal intermediates. To achieve this goal were used Simultaneous Thermogravimetry-Differential Thermal Analysis and Differential Scanning Calorimetry were used to determine the thermal properties; Furthermore, X-ray Powder Diffraction helped to confirm the crystallographic phase of each one and the morphological properties were studied using Scanning Electronic Microscopy. Lastly, the Ultra Violet-Visible/Near infrared spectroscopy together with the microscopy-Differential Scanning Calorimetry results elucidated the effect of the electronical changes on observed color. All these changes were related to the temperature.
UNESP- São Paulo State University School of Sciences Chemistry Department
UNESP- São Paulo State University Institute of Chemistry
UNESP- São Paulo State University School of Sciences Chemistry Department
UNESP- São Paulo State University Institute of Chemistry
CAPES: 024/2012
FAPESP: 2017/14936-9
FAPESP: 2018/03460-6
FAPESP: 2018/24378-6
CNPq: 421469/2016-1
