Application of response surface methodology for the photo degradation of dye using ZnO nanorods loaded on the activated carbon

In this work, ZnO with a nanorod morphology loaded on activated carbon (ZnO NRs-AC) was synthesized using the co-precipitation method for the photo-degradation of malachite green (MG) under the UV light. The photo-catalyst was characterized using various analytical techniques including XRD and FE-SEM. The Box-Behnken design (BBD) combined with the response surface methodology (RSM) was applied for the optimization of the influential parameters. The optimum values for the parameters involved were as follow: photo-catalyst dosage,16 mg; MG concentration, 30 mg L-1; and reaction time was 46 min. Studying the effect of foreign ions on the performance of the photo-catalytic process indicated the stability of ZnO NRs-AC in the photo-catalytic degradation of MG. According to the Langmuir–Hinshelwood (L–H) kinetic model, the kinetic degradation of MG followed a pseudo-first order kinetic model

Investigation of photo-catalytic effect of SnO2/AC nanocomposite on photo-degradation of basic yellow 13 and rodamin b dyes

AbstractIn this study, the degradation of the two dyes basic in their binary mixture is examined under the light irradiation in the presence of catalyst. A mercury lamp, which was located at a distance 30 cm from the solution surface, was used as the UV irradiation source. The first-order derivative spectra was used to obtain the residual concentration of each dye in mixtures after a given time of photo-degradation. The and techniques are employed to confirm the nanocomposite prepared. The effects of the parameters involved in the photo-catalytic activity including the solution, catalyst dosage, and concentrations of the two dyes are studied. The results obtained show that under the optimum experimental conditions and after 60 minutes of the UV light irradiation in the presence of the 8 mg catalyst and in the of 5.5, the percentage degradation of the two dyes are more than 90%

Synthesis and toxicity assessment of Fe3O4 NPs grafted by ∼ NH2-Schiff base as anticancer drug: modeling and proposed molecular mechanism through docking and molecular dynamic simulation

Superparamagnetic iron oxide nanoparticles have been synthesized using chain length of (3-aminopropyl) triethoxysilane for cancer therapy. First, we have developed a layer by layer functionalized with grafting 2,4‐toluene diisocyanate as a bi‐functional covalent linker onto a nano-Fe3O4 support. Then, they were characterized by Fourier transform infrared, X-ray powder diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and VSM techniques. Finally, all nanoparticles with positive or negative surface charges were tested against K562 (myelogenous leukemia cancer) cell lines to demonstrate their therapeutic efficacy by MTT assay test. We found that the higher toxicity of Fe3O4@SiO2@APTS ∼ Schiff base-Cu(II) (IC50: 1000 μg/mL) is due to their stronger in situ degradation, with larger intracellular release of iron ions, as compared to surface passivated NPs. For first time, the molecular dynamic simulations of all compounds were carried out afterwards optimizing using MM+, Semi-empirical (AM1) and Ab-initio (STO-3G), Forcite Gemo Opt, Forcite Dynamics, Forcite Energy and CASTEP in Materials studio 2017. The energy (eV), space group, lattice parameters (Å), unit cell parameters (Å), and electron density of the predicted structures were taken from the CASTEP module of Materials Studio. The docking methods were used to predict the DNA binding affinity, ribonucleotide reductase, and topoisomerase II