研究目的
Investigating the photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis.
研究成果
In the present research, anatase TiO2 nanosheets were successfully synthesized via eco-friendly, green and facile hydrothermal synthetic approach in the presence of N, N dimethylformamide as new morphology-controlling agent under alkaline media. The as-produced TNSs were unveiled exceptional photocatalytic degradation of phenol under visible light irradiation owing to narrow band gap energy and sheet-like morphology, confirmed through various characterization techniques. To improve the photocatalytic degradation activity of TNSs, two green oxidants namely H2O2 and FeCl3 were introduced for the maximum removal of phenol. The degradation results revealed that these green oxidants have strong ability to produce free OH? radicals and speedily reduction of photogenerated of electrons hole-pairs with degradation efficiency of 94.23 and 92.67%, respectively. In adsorption studies, pseudo first order and pseudo second order kinetic equations were found to be more applicable to describe the phenol adsorption data producing maximum R2. Langmuir and Freundlich were approved to be more appropriate isotherms for phenol adsorption data. Thermodynamics and activation energy parameters were strongly suggested that adsorption of phenol is suitable, spontaneous, endothermic and physical process.
研究不足
The technical and application constraints of the experiments, as well as potential areas for optimization.