Semnan University Press Applied Chemistry Today 2981-2437 16 58 2021 03 21 Solvothermal synthesis of ZnTiO3 photocatalyst: Investigation of effect of pH and calcination temperature Solvothermal synthesis of ZnTiO3 photocatalyst: Investigation of effect of pH and calcination temperature 29 46 4612 10.22075/chem.2020.18520.1695 FA Majid Mozaffari Department of Chemistry, Shahrood Branch,Islamic Azad University, Shahrood, Iran. Amin Ebadi Department of Chemistry, Kazerun Branch, Islamic Azad University, Kazerun, Iran Journal Article 2019 08 20 Abstract<br />In this study, zinc titanite nanoparticles were synthesized using the solvothermal method. The effects of pH and calcination temperature on the structures, morphology and photocatalytic activity of the resulting compounds were investigated.These nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), emission reflectance spectroscopy (DRS), X-ray energy dispersive spectroscopy (EDAX), Photoluminescence (PL) and UV-Vis spectroscopy.X-ray diffraction patterns confirmed the cubic pure ZnTiO3 structures synthesized at pH= 3 and calcination temperature of 700 ° C and hexagonal at pH=3 and pH=7 and calcination temperature of 800 ° C. Crystallinity was not visible in scanning electron microscope images. Also, full cubic and hexagonal structures of ZnTiO3 nanoparticles are easily visible in transmission electron microscopy images. In investigation photocatalytic results, Photocatalytic degradation kinetics data were evaluated by pseudo-first-order kinetics model. The efficiency of methylene blue dye degradation under visible light of the catalysts ZTO-10-900, ZTO-7-800, ZTO-3-700 was 95%, 83% and 78%, respectively. In ZTO-10-900 catalyst the presence of 423 and 527 nm bands in the photoluminescence emission spectra indicates the presence of crystalline defects in this compound and the major factor contributing to the higher efficiency in photocatalytic activity. Abstract<br />In this study, zinc titanite nanoparticles were synthesized using the solvothermal method. The effects of pH and calcination temperature on the structures, morphology and photocatalytic activity of the resulting compounds were investigated.These nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), emission reflectance spectroscopy (DRS), X-ray energy dispersive spectroscopy (EDAX), Photoluminescence (PL) and UV-Vis spectroscopy.X-ray diffraction patterns confirmed the cubic pure ZnTiO3 structures synthesized at pH= 3 and calcination temperature of 700 ° C and hexagonal at pH=3 and pH=7 and calcination temperature of 800 ° C. Crystallinity was not visible in scanning electron microscope images. Also, full cubic and hexagonal structures of ZnTiO3 nanoparticles are easily visible in transmission electron microscopy images. In investigation photocatalytic results, Photocatalytic degradation kinetics data were evaluated by pseudo-first-order kinetics model. The efficiency of methylene blue dye degradation under visible light of the catalysts ZTO-10-900, ZTO-7-800, ZTO-3-700 was 95%, 83% and 78%, respectively. In ZTO-10-900 catalyst the presence of 423 and 527 nm bands in the photoluminescence emission spectra indicates the presence of crystalline defects in this compound and the major factor contributing to the higher efficiency in photocatalytic activity. https://chemistry.semnan.ac.ir/article_4612_000871c1fc726f0b52dc86a4eeb027de.pdf