Abstract
The removal of aniline blue dye from aqueous solutions using the A-site doped perovskite Ce1-xBixCrO3 (x = 0, 0.5, 1) was investigated. The perovskite oxides were synthesised using Sol-Gel method and characterised by conventional powder X-ray diffraction technique. The X-ray diffraction measurements suggested that doping with Bismuth Ion influences both the crystal structure and the particle size of the oxides, and consequently affects the adsorption properties. It was found that both CeCrO3 and Ce0.5Bi0.5CrO3 compounds are orthorhombic and have approximate particle size of 87 and 36 nm respectively, whereas BiCrO3 oxide has rhombohedral space group symmetry and the particle sizes are less than 49 nm. The batch mode study demonstrated that the removal capacities of Aniline Blue at 150 min and pH = 4.3 for Ce0.5Bi0.5CrO3, CeCrO3 and BiCrO3 are 779.67, 705.45 and 440.18 mg/g respectively. The results reflect the influence of the A site doping on the adsorption properties of the oxides. The removal of Aniline Blue was found to be negatively correlated with temperature and pH.
Highlights
The residual dyes from textile and printing industries are considered a wide variety of organic pollutants introduced into the water resources
It was found that both CeCrO3 and Ce0.5Bi0.5CrO3 compounds are orthorhombic and have approximate particle size of 87 and 36 nm respectively, whereas BiCrO3 oxide has rhombohedral space group symmetry and the particle sizes are less than 49 nm
The batch mode study demonstrated that the removal capacities of Aniline Blue at 150 min and pH = 4.3 for Ce0.5Bi0.5CrO3, CeCrO3 and BiCrO3 are 779.67, 705.45 and 440.18 mg/g respectively
Summary
The residual dyes from textile and printing industries are considered a wide variety of organic pollutants introduced into the water resources. The Perovskite type oxides exist in a variety of compositions and structures each associated with unique physical properties. They contain two different cations, each surrounded by oxygen anion. The incorporation of a cation with a stereo chemically active lone pair of electrons onto the A-site is known to have a significant effect on the structure and properties of perovskite. Aniline Blue is typically organic soluble compound utilized in textile industry for dyeing of nylon, wool, silk and cotton. It is thought that employing mixed metal oxides such as Ce1−xBixCrO3 in removal of organic dyes can be a good replacement with other high cost adsorbents due to its high accessibility and low cost
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