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گواهی نمایه سازی مقاله The Influence of Morphology on Photo-catalytic Activity and Optical Properties of Nano-crystalline ZnO Powder

عنوان مقاله: The Influence of Morphology on Photo-catalytic Activity and Optical Properties of Nano-crystalline ZnO Powder
شناسه (COI) مقاله: IMES06_651
منتشر شده در اولین همایش بین المللی و ششمین همایش مشترک انجمن مهندسی متالورژی ایران در سال ۱۳۹۱
مشخصات نویسندگان مقاله:

S. Mollaesmail - Materials and Metallurgical Engineering Department, Advanced Materials Research Center, SahandUniversity of Technology,
J. Moghaddam -
v. bahramian - School of Metallurgy and Materials Engineering, University of chamran

خلاصه مقاله:
ZnO nano-particles were synthesized via an ammonical ammonium carbonate solution by precipitation method in presence of some additives such as Urea, Oleic and Stearic acid. The morphology and crystallinity of the obtained zinc oxide particles depend critically on the type of additive which was used. Additives also affected the crystal orientation of precipitate nano-particles. SEM, XRD, BET and UV-visible were used to characterize morphology, microstructure, specific surface area and optical properties of the products. Photo-catalysis properties of the as-prepared ZnO powders were evaluated by degradation of methyl red (acid red) in aqueous solution exposed to UV-light. Results suggested a close relationship among the morphology, size and surface area on photo-catalysis and optical properties of the particles. The widest Eg value (3.56 eV), highest degradation and decolorization efficiency (99%) were obtained from a sample with the smallest grain size (largest surface area ) which were used urea as an additive

کلمات کلیدی:
Nano particles; ZnO; precipitation method; Optical properties; Photocatalytic activity

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