Synthesis and characterization of nano-ceramic pigment Co_0.5Zn_0.5Al₂O₄ via polyacrylamide gel method

Abstract

Purpose The purpose of this paper is to synthesize and characterize nano-ceramic blue pigment Co0.5Zn0.5Al2O4 via polyacrylamide gel method. Generally, the high cost and the environmental toxicity of cobalt aluminate pigments lead them to become less common and cause problems in production process. To significantly reduce this problem, it is required to reduce the cobalt in the pigment and replace the cobalt with some amounts of zinc in the structure. Design/methodology/approach In this paper, calcination temperature and its effects on phase specification and color properties of final product were investigated. The powders were studied by using XRD, FESEM, TG/DTA, FTIR, UV-Vis and colorimetric in CIELab space, in which the calcination temperatures were set to 600°C, 800°C and 1,000 °C, and the inert atmosphere was air. Findings According to the XRD patterns, single-phase spinel structure with a good crystallinity was formed even in the low temperature. The infrared spectra displayed vibrations at about 500, 560 and 680 cm−1, which were ascribed to the spinel structure. FESEM images showed nanoscale particles with an average size of 32 nm. Regarding the Co2+ spin transitions in tetrahedral sites, the UV-Vis spectra presented three bands at 552, 598 and 628 nm. Practical implications The colorimetric data indicated the formation of blue pigments corresponding to negative values of b*. The color of pigments was affected by calcination temperature. Originality/value The characterization analysis shows that a blue pigment has been obtained in this research. Different degrees of blue color were obtained at different calcination temperatures.

Strontium-induced phase, energy band and microstructure regulation in Ba1−xSrxTiO3photocatalysts for boosting visible-light photocatalytic activity

“…The polyacrylamide gel method is an effective method to synthesize ion-doped semiconductor photocatalysts, but it has not been used to synthesize BST photocatalysts. 33,34 Therefore, it is of great significance to synthesize BST photocatalysts by the polyacrylamide gel method and study the evolution of the phase structure, microstructure, energy band structure and photocatalytic activity of BST photocatalysts induced by strontium ions.…”

The effect of mineralizer addition and temperature on synthesis of malayaitepink pigment

“…Pigments were synthesized in different ways. It is considerable that the technique for synthesis plays a key part in impacting the terminal favorable properties of nanopigments (Rahimian et al , 2020).…”