Removal of textile pollutants from aqueous medium using biosynthesized CuO nanoparticles: Theoretical comparative investigation via analytical model.

The work deals with the removal of two dyes, namely methylene blue (MB) and methyl orange (MO), from polluted water by adsorption onto CuO nanoparticles synthesized with a green synthesis procedure, starting from plant resources. Adsorption isotherms are determined at different temperatures aiming at investigating the adsorption mechanisms of the two dyes. The experimental results indicate that, for both MB and MO, the adsorption capacity increases with increasing temperature, with slight differences in the case of MO.

Three novel polysulfide-based conjugated polymers and characterization of their optoelectronic properties.

The aim of this study was to investigate the effect of side chain size on the optical and charge transport properties of thin films prepared from novel conjugated polysulfide-based polymers. Three polymers, labeled P1, P2, and P3, were derived from polysulfide derivatives and had different arylene groups (5,5'- biphenylene, 4,4'-biphenylene, and 2,6-pyridylene). Optical analysis was performed using photoluminescence (PL) and UV-visible absorption spectroscopy, revealing an energy band gap of 2.

Design, synthesis, and density functional theory studies of a new selective chemosensor for Pb.

Herein, we have focused on a new colorimetric ligand synthesized from the reaction of 2-hydroxy-5-methylbenzene-1,3-dialdehyde with 2-amino-thiophenol, and investigated its activity as a sensor. In this regard, the sensory activity of the ligand towards different ions (Mn, Cu, Co, Fe, Fe, Zn, Ni, Cd, Ag, Na, Cs, Mg, Al, Ba, K, and Pb) was studied. The specificity of ion bindings is discussed through UV-Vis analysis.

Green synthesis of copper oxide nanoparticles using plant extract and a study of their antifungal, antibacterial activity and photocatalytic performance under sunlight.

In the present work, copper oxide (CuO NPs) was synthesized by an eco-friendly, simple, low-cost, and economical synthesis method using aqueous plant extract as a reducing and capping agent. The biosynthesized CuO-NPs were compared with chemically obtained CuO-NPs to investigate the effect of the preparation method on the structural, optical, morphological, antibacterial, antifungal, and photocatalytic properties under solar irradiation. The CuO NPs were characterized using X-ray diffraction (XRD), UV-VIS spectroscopy, Fourier transform infrared spectrometer (FTIR) analysis, and field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX).