Mixed oxides with corundum-type structure obtained from recycling can seals as paint pigments: color stability

Green chromium and red iron oxides are technically important pigments due to their high color intensity, good dispersibility in paints, and superior hiding power. We report on the synthesis of colored pigments of mixed oxides with a corundum-type structure. The pigments are obtained via the addition...

Full description

Saved in:
Bibliographic Details
Published in:Beilstein journal of nanotechnology 2023, Vol.14 (1), p.467-477
Main Authors: Horsth, Dienifer F L, Primo, Julia de O, Balaba, Nayara, Anaissi, Fauze J, Bittencourt, Carla
Format: Article
Language:English
Subjects:
Boehmite
Chromium
Circular economy
Color
colorimetry
Corundum
Crystallography
Electromagnetic absorption
Energy consumption
Environmental impact
Full Research Paper
Iron oxides
Mixed oxides
Morphology
Nanoscience
Nanotechnology
Oxidation
Pigments
Raman spectroscopy
Recycling
Spectrum analysis
Stability analysis
sustainability
Valence
X ray photoelectron spectroscopy
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Green chromium and red iron oxides are technically important pigments due to their high color intensity, good dispersibility in paints, and superior hiding power. We report on the synthesis of colored pigments of mixed oxides with a corundum-type structure. The pigments are obtained via the addition of coloring ions to boehmite from recycled metallic aluminium. X-ray diffractometry (XRD) and Raman spectroscopy confirmed the crystallographic phase. Additionally, the oxidation state 3+ responsible for the greenish (chromium) and reddish (iron) coloration of the mixed oxides was confirmed by XPS and visible-light absorption measurements. The colorimetric stability of the oxides in acid and alkaline environments was evaluated. After 240 h of exposure to harsh environments, both pigments demonstrated stability and showed no strong color difference.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.14.37