Related Experiment Video
Updated: Jan 28, 2026

Study of Short Peptide Adsorption on Solution Dispersed Inorganic Nanoparticles Using Depletion Method
Published on: April 11, 2020
Effective La-Na Co-Doped TiO₂ Nano-Particles for Dye Adsorption: Synthesis, Characterization and Study on Adsorption
Inderjeet Singh1, Balaji Birajdar2
1Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi 110067, India. lathaphysics69@gmail.com.
Abstract:
The mesoporous La-Na co-doped TiO₂ nanoparticles (NPs) have been synthesized by non-aqueous, solvent-controlled, sol-gel route. The substitutional doping of large sized Na+1 and La+3 at Ti4+ is confirmed by X-ray diffraction (XRD) and further supported by Transmission Electron Microscopy (TEM) and X-ray Photo-electron Spectroscopy (XPS). The consequent increase in adsorbed hydroxyl groups at surface of La-Na co-doped TiO₂ results in decrease in pHIEP, which makes nanoparticle surface more prone to cationic methylene blue (MB) dye adsorption. The MB dye removal was examined by different metal doping, pH, contact time, NPs dose, initial dye concentration and temperature. Maximum dye removal percentage was achieved at pH 7.0. The kinetic analysis suggests adsorption dynamics is best described by pseudo second-order kinetic model. Langmuir adsorption isotherm studies revealed endothermic monolayer adsorption of Methylene Blue dye.
Related Concept Videos
Analyte Adsorption and Distribution
Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision
Kinetic Energy
Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy
Factors Affecting Dissolution: Particle Size and Effective Surface Area
Enzyme Kinetics
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...

