Intermolecular dispersion potential of cerium oxide nanoflakes with aqueous polymer and amino acids studied by using physicochemical and optical properties at 303.15 K

Abstract

The dispersion of CeO2 Nanoflakes (CONFs) a lanthanide metal oxide in aqueous medium is weak due to strong agglomeration within structure. In this context, the dispersion of CONFs with polymer and amino acids (AA) in aqueous are reported. The XRD and FESEM are used to confirm structure and shape of CONFs. The FTIR and Raman spectroscopy results revealed a presence of functional moieties and confirms the structure of CONFs. The physicochemical properties (PCPs) such as density (ρ, g cm−3), Apparent Molar Volume (Vϕ, cm3·mol−1), viscosity (η, mPa.s), surface tension (γ, mNm−1), friccohesity (σ, s.m−1) and activation energy (Δµ2*, kJ/mol), and optical behaviour of CONFs with polyethylene (PEG400, PEG6000), Tyrosine (Tr) and Tryptophan (Tryp) separately, in aqueous solution have been reported at 303.15 K. The PCPs and optical behaviour investigate the state of intermolecular forces (IMF) between CONFs and PEG, AA in presence of water and concentration of CONFs ranged from 25 µM to 150 µM in binary and ternary systems at predetermined (freshly prepared and after one-week) time. This study focused on molecular interacting mechanism investigated through physicochemical and optical methods for CONFs interaction with biomolecules to improve the dispersion potential and structural properties of the solutions. The PCPs data demonstrate that maximum hydrogen bond (HB) and electrostatic interactions of CONFs with PEG400, PEG6000, Ty and Tryp revealed that the time dependent dispersion activities increase with increasing concentration of CONFs in aqueous medium.