Eco-Friendly Synthesis of Superparamagnetic Fe3O4 Nanoparticles from Hibiscus Rosa-Sinensis Leaf Extract and Their Application in RB-4 Dye Removal Letters in Applied Nanobioscience, 2024 In this study, iron-based nanoparticles (HS-Fe-NPs) were synthesized using an extract obtained from Hibiscus rosa-sinensis leaves. These nanoparticles were used to remove reactive blue-4 dye from synthetic water samples. The results indicated that a remarkable removal efficiency of over 99.50 percent was achieved for the reactive blue-4 dye with an initial concentration of 100 mg/L at pH 6.0. SEM, XRD, and FTIR analyses were conducted to understand the removal mechanism better and examine the surface changes of HS-Fe-NPs before and after adsorption. Furthermore, UV-VIS analysis was employed to determine the intermediate and final products of the reactive blue-4 dye, shedding light on the potential pathway. VSM analysis was performed to study the magnetic behavior of the synthesized nanoparticles, revealing their superparamagnetic nature with a saturation magnetization of 80.58 emu/g. The Freundlich model successfully described the sorption isotherm, indicating a favorable result based on the experimental data. The highest adsorption capacity of HS-Fe-NPs for RB-4 dye was determined to be 819.67 mg/g. The experimental results revealed that the pseudo-second-order model provided a more accurate representation of enhanced effectiveness. Furthermore, the ∆G° values were found to be negative at all temperatures, indicating the favorable and spontaneous characteristic of the sorption process.
Synthesis of Biodegradable Film Made from Sodium Alginate Embedded with Magnesium Nanoparticles for Food Packaging Applications Harish Kumar, Anuj Kumar Singh, Munendra Kumar, Kusagra Singh, Vishal, Ankur Gaur, M. S. Karuna, Afreen Nishat, Laiba Saltnat Theoretical Foundations of Chemical Engineering, 2023 The current work focuses on the synthesis of the biodegradable film made from Sodium alginate (S.A), and then the addition of magnesium oxide nanoparticles (MgO-NPs) was synthesized by sol-gel technique. Glycerol which is a plasticizer is used to enhance the tensile strength (TS) and film expansion due to a decrease in intermolecular forces in the polymer chain. With the addition of olive oil (OE), the functional properties of control films were improved, which results in a lowering of water solubility, and moisture content but the tensile strength slightly decreased. The opacity, moisture absorption, and solubility of the film, thickness, tensile strength (TS), elongation (EB), ultraviolet-vis spectroscopy, scanning electron microscope (SEM), transmission electron microscopy (TEM) were used to characterize sodium alginate biofilm with the addition of MgO-NPs (SA1) and without the addition of MgO-NPs (SA2). But considering all other factors, the film (SA1) revealed a slower rate of degradation than the film (SA2). The film’s TS and opacity are enhanced by MgO-NPs addition, while moisture content (WVP), solubility, and elongation at break are decreased.
Evaluation of effects of piperazine on Barium carbonate via upgrading biogas with absorption of CO2 using alkaline solution Research Journal of Chemistry and Environment, 2021
Synthesis and swelling behavior of superabsorbent hydrogels acquired from CMC for efficient drug-delivery Research Journal of Chemistry and Environment, 2018
