Cobalt selenate pentahydrate: Thermal decomposition intermediates and their properties dependence on temperature changes

Author(s)

Machado, Rafael de Godoi ^[1] ; Gaglieri, Caroline ^{[1, 2]} ; Alarcon, Rafael Turra ^{[1, 2]} ; de Moura, Aniele ^{[1, 2]} ; de Almeida, Amanda Cosmo ^{[1, 2]} ; Caires, Flavio Junior ^{[3, 1, 2]} ; Ionashiro, Massao ^[3]

Affiliation

^[1] Sao Paulo State Univ, Sch Sci, Chem Dept, UNESP, BR-17033260 Bauru, SP - Brazil

^[2] Ionashiro, Massao, Sao Paulo State Univ, Inst Chem, UNESP, BR-14800060 Araraquara, SP, Brazil.Machado, Rafael de Godoi, Sao Paulo State Univ, Sch Sci, Chem Dept, UNESP, BR-17033260 Bauru, SP - Brazil

^[3] Sao Paulo State Univ, Inst Chem, UNESP, BR-14800060 Araraquara, SP - Brazil

• Document type: Journal article
• Source: Thermochimica Acta; v. 689, JUL 2020.
• Web of Science Citations: 0

Abstract

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. (AU)

• FAPESP's process: 18/24378-6 - Synthesis, characterization and thermoanalytical study of Valsartan, Candesartan Cilexetil and Olmesartan medoxomil co-crystals
• Grantee: Flávio Junior Caires
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/14936-9 - Preparation, characterization and thermoanalytical studies of heterogeneous catalysts of double selenates of Mg/Co and Mg/Cu in biodiesel production using different oils
• Grantee: Massao Ionashiro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/03460-6 - Structural modification of triglycerides aiming new monomers and polymers, using different synthetic routes: microwave irradiation and photopolymerization
• Grantee: Rafael Turra Alarcon
• Support Opportunities: Scholarships in Brazil - Doctorate