title: Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange.
abstract: Nanosized ZrO2 powders with near pure monoclinic, tetragonal, and cubic structures synthesized by various methods were used as catalysts for photocatalytic degradation of methyl orange. The structural and textural properties of the samples were analyzed by X-ray diffraction, Raman spectroscopy, TEM, UV-vis, X-ray photoelectron spectroscopy (XPS), and N2 adsorption measurements. The performance of synthesized ZrO2 nanoparticles in the photocatalytic degradation of methyl orange under UV light irradiation was evaluated. The photocatalytic activity of the pure monoclinic ZrO2 sample is higher than that of the tetragonal and cubic ZrO2 samples under optimum identical conditions. The characterization results revealed that monoclinic ZrO2 nanoparticles possessed high crystallinity and mesopores with diameter of 100 Å. The higher activity of the monoclinic ZrO2 sample for the photocatalytic degradation of methyl orange can be attributed to the combining effects of factors including the presence of small amount of oxygen-deficient zirconium oxide phase, high crystallinity, large pores, and high density of surface hydroxyl groups.
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia.
authors: Sulaiman N
authors: SN
authors: Basahel
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia ; Chemistry Department, Faculty of Science, Sohag University, P.O. Box 82524, Sohag, 82524 Egypt.
authors: Tarek T
authors: TT
authors: Ali
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia ; Physical Chemistry Department, National Research Centre, El Buhouth St., Dokki, Cairo, 12622 Egypt.
authors: Mohamed
authors: M
authors: Mokhtar
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box, 80203, Jeddah, 21589 Kingdom of Saudi Arabia.
authors: Katabathini
authors: K
authors: Narasimharao
keywords: Methyl orange; Photocatalytic degradationl; Structural effect; ZrO2