EFFECT of METAL DOPING ON THE ADSORPTION EFFICIENCY of TiO2 NANO PARTICLE PREPARED BY ECO - FRIENDLY METHOD

Document Type : Original Article

Authors

1 department of chemistry , faculty of science , benha university

2 faculty of Science, Benha university

3 Chemistry, Faculty of Science, Benha University, Benha, Egypt

10.21608/jbes.2024.325428.1010

Abstract

The current study reports the successful synthesis of nano-sized TiO2 and its M-doped nanoparticles (M = Fe, Cu, Zn, and Zr) via an environmentally friendly method utilizing the co-precipitation technique. The precursor in this method was titanium tetraisopropoxide (5.0 mM), and the bio-reductant was pomegranate peel extract. They were used as adsorbents to remove the synthetic effluent's (MB) color. The primary objective is to examine how the doping method affects TiO2 NP's catalytic and adsorption effectiveness . M-doped TiO2 nanoparticles were discovered to possess much superior properties compared to TiO2NP following an analysis of the impacts of catalyst mass, contact time, and initial dye concentration for each of the created samples. optimal dye concentration was determined to be 125 mg/L, the optimal nano oxide dosage to be around 100 mg/L, and the equilibrium length of contact to be less than 90 minutes. The results of the Langmuir isotherm for the adsorption of MB on the surface of the as-prepared NP, which were derived from the adsorption capacity (Qo) values, the correlation coefficient (R2), and the dimensionless separation factor (RL), indicate that the Langmuir adsorption isotherm is more applicable than the Freundlich one. Kinetic experiments were evaluated using pseudo-first order and pseudo-second order Lagergren models. Nearly majority of the nanoparticles under investigation produced second order plots with good linearity straight lines. The anticipated correlation coefficients are closer to unity in comparison to the pseudo-first order scenario. As such, the main mechanism that positively impacts the sorption reactions is pseudo-second order sorption.

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