Nanoparticles of perovskite-type LaCo0.5Fe0.5O3 (LCFO) were fabricated by sol–gel method.Thermal decomposition process of the complex precursor was examined by means of differentialthermal analysis–thermal gravimetric analysis (DTA/TGA). X-ray diffraction (XRD) resultsshowed that single perovskite phase has been completely formed after calcination at 750 °C. Inaddition, the surface morphology and composition of these nanopowders were also investigatedusing SEM and EDX. These nanoparticles showed the excellent adsorption efficiency towardsTrypan Blue (TB) as a reactive dye in aqueous solution. The adsorption studies were carried outat different pH values, dye concentrations, various adsorbent dosages and contact time in a batchexperiments. LCFO exhibited good dye removal efficiency at acidic pH specially pH 2.Experimental results indicated that the adsorption kinetic data follow a pseudo-second-order ratefor tested dye. The isotherm evaluations revealed that the Freundlich model better fits to theexperimental equilibrium data than Langmuir the model. Manuscript profile

In this work La0.7Sr0.3MnO3 , one group of nanosized perovskite-type oxides were prepared by sol-gel method. The perovskite structure has been characterized by X-ray diffraction (XRD) , scanning electron microscopy (SEM) , energy dispersive X-ray spectrometer (EDX) and Fourier transform infrared (FTIR) . The nanoparticles showed the excellent adsorption properties towards reactive blue 4 (RB4) as a reactive dye. The adsorption studies are carried out at different pH values, different adsorbate concentrations, various adsorbent dosages, different temperature, and contact time in a batch experiments to find the optimum conditions. Manuscript profile

In this research article, we report the preparation of from melamine-terephthalaldehyde supported Copper-1,2,4,5-tetrabenzenecarboxylic acid (COF-MOF) as a porous acidic catalyst for the one-pot preparation of 1,8-Dioxooctahydroxanthenes. As a new methodology, this strategy offers several advantages including green reaction conditions, high yield of the products, short reaction time, facile work-up, and recyclability of the catalyst. Manuscript profile

در این تحقیق یک نانو پودر اکسید مضاعف از نوع اسپینل با فرمول LiMn0.5Co1.5O4 به روش سل-ژل تهیه گردید. برای مشخصه یابی بلوری، ریختی، سطح ویژه و اندازه دانه ای نانوذرات از یک سری آنالیزهای تجزیه ای مانند XRD, TGA،SEM ،FT-IR استفاده گردید. الگو پراش اشعه ایکس نشان داد که بعد از عملیات تکلیس ، تنها فاز اسپینل با ساختار مورد نظر تشکیل شده است. پس از شناسایی و مشخصه یابی اسپینل رشد داده شده به بررسی حذف فسفات از محلول آبی پرداخته شد. برای حذف آلاینده پارامترهای مختلفی از جمله: زمان، غلظت جاذب، غلظت رنگ و pH مورد مطالعه قرار گرفتند. Manuscript profile