Semnan University Press Applied Chemistry Today 2981-2437 12 42 2017 03 21 Synthesis, characterization and application of alumina nanoparticles for photocatalytic degradation of congo red dye Synthesis, characterization and application of alumina nanoparticles for photocatalytic degradation of congo red dye 23 34 778 10.22075/chem.2017.2667. FA Mahzad Firouzi Azita Nouri Ahmad Nozadgolikand Journal Article 2016 01 20 In this study, alumina (Al2O3)  nanoparticles were synthesized by a sol-gel method. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) coupled with energy dispersive spectroscopy (EDS), fourier transform infrared spectroscopy (FT-IR), adsorption-desorption N2 isotherms (BET) and (BJH). Although, alumina was known as an insulator, results in this work were shown, synthesized metal oxide, act as a suitable photocatalyst. The effect of various parameters including irradiation time, pH and catalyst dosage on the degradation of congo red dye was investigated. The best results were obtained under visible light radiation and at irradiation time 30 minute, pH=4, 0.1 g catalyst. In this study, alumina (Al2O3)  nanoparticles were synthesized by a sol-gel method. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) coupled with energy dispersive spectroscopy (EDS), fourier transform infrared spectroscopy (FT-IR), adsorption-desorption N2 isotherms (BET) and (BJH). Although, alumina was known as an insulator, results in this work were shown, synthesized metal oxide, act as a suitable photocatalyst. The effect of various parameters including irradiation time, pH and catalyst dosage on the degradation of congo red dye was investigated. The best results were obtained under visible light radiation and at irradiation time 30 minute, pH=4, 0.1 g catalyst. https://chemistry.semnan.ac.ir/article_778_d714b2242d7ffbf48818b8f9fbdf13d4.pdf