Dataset of chemical, structural and optical characterization of black mineral sand

Published: 17-02-2020| Version 2 | DOI: 10.17632/k7yt9hm7zw.2
Contributor:
Andrés Felipe López Vásquez

Description

The chemical, structural and optical properties of each fraction obtained from black mineral sand was characterized with thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR) and UV-Vis spectroscopies techniques. The thermogravimetric analysis (TGA) was carried out using TGA /DSC Star System Mettler Toledo analyzer, for observing the thermal behavior. Previously to TGA/DSC scans, the samples were degasified at 100°C during 60 min at 20 cm3 min-1 in nitrogen purge stream and the analysis were performed since 25°C to 1000°C at a heating rate of 5°C min-1 under 100 cm3 min-1 in flowing air (the TGA/DSC curves were normalized regarding the sample weight). The functional groups of the substrates adsorbed to the catalyst were identified with a FT-IR 8400S spectrophotometer (Shimadzu) at room temperature within the range of 4000-400 cm-1. The UV reflectance of the solid were analyzed with an UV/Vis spectrophotometer (Shimadzu UV-2600) with an integrating sphere for acquisition of the diffuse reflectance spectra (BaSO4 was used as reference). With this information, the Tauc plots were used to estimate the material band-gap energy (Eg), by extrapolation of the straight line from the absorption curve to the abscissa.

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