CHEMICAL PROBLEMS

Abstract Galvanic coatings of Co-Mn are promising materials for obtaining protective spinel layers of (Mn,Co)₃O₄ on stainless steel, which can be successfully used in solid-oxide fuel cells (SOFCs) as interconnects. To enhance the anti-corrosion and heat resistance properties of Co-Mn, tungsten is introduced into the coatings via electrodeposition. Mn-containing Co-W coatings electrodeposited from electrolytes containing […]

Abstract This study employed nanoclay as a low-cost, environmentally friendly adsorbent for the effective removal of malachite green (MG) dye from aqueous solutions. The nanoclay was characterized using XRD, FESEM, TEM, TGA, and FTIR. Structural and morphological analyses confirmed a porous, multilayered structure that was enhanced after adsorption. Batch experiments were conducted to evaluate the […]

Abstract. This study focuses on the synthesis of p-phenylenediamine using polyethylene terephthalate (PET) waste as a raw material. Initially, terephthalic acid was recovered from PET waste via an alkaline hydrolysis method. The obtained terephthalic acid was then amidated with urea under high pressure in the presence of a catalyst. Subsequent chlorination was carried out under […]

Abstract: For many years lime mortar has been an indispensable building material used in all countries of the world. The position of lime mortar for restoration work has especially increased. Since one of the main factors of durability of historical and cultural monuments is the quality of mortar, it is necessary to select such components […]

Abstract This research focuses on producing a safe and thermally stable fertilizer by modifying ammonium nitrate (AN) with serpentinite, a magnesium-containing mineral. AN:SP mass ratios from 100:1 to 100:50 were studied; the 100:20 ratio showed optimal performance. At this ratio, nitrogen content remained at 30.58%, granule strength reached 3.895 kg/granule, and dissolution time was 136.8 […]

Abstract: In this study, the green synthesis of silver nanoparticles (AgNPs) was carried out, and the physicochemical properties of the complexes formed between AgNPs, dithiooxamide (R) reagent, and cetyltrimethylammonium bromide (CTAB) were investigated. The formation and structural features of the resulting complexes were confirmed by ultraviolet-visible (UV-Vis) spectroscopy, infrared (IR) spectroscopy, and X-ray diffraction (XRD) […]

Abstract A new, simple, sensitive, and rapid spectrophotometric method has been developed for the determination of doxorubicin hydrochloride (DOX) via charge-transfer complex formation with o-chloranil in its pure form and pharmaceutical preparations (injection). The method is based on the formation of a stable 2:1 (Reagent: Drug) complex in an ethanol medium, showing maximum absorbance at […]

Abstract: In this study, some oxazepine-4,7-dione derivatives (SH8-SH13) were prepared from Schiff bases by reacting them with maleic anhydride without using solvents, using the fusion method, which is considered a safe, environmentally friendly, cost-effective, and time-saving method. The compounds were characterized using several spectroscopic techniques, such as FT-IR, UV-Vis, NMR, and GC-Mass. The structural results […]