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دانلود مقاله Synthesis of ZnO/SnO2 Coupled Nanoparticles by Coprecipitation Method Under Ultrasonic Irradation and Study of Their Photocatalytic Activity فایل ورد (word) دارای 2 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد دانلود مقاله Synthesis of ZnO/SnO2 Coupled Nanoparticles by Coprecipitation Method Under Ultrasonic Irradation and Study of Their Photocatalytic Activity فایل ورد (word) کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

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توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی دانلود مقاله Synthesis of ZnO/SnO2 Coupled Nanoparticles by Coprecipitation Method Under Ultrasonic Irradation and Study of Their Photocatalytic Activity فایل ورد (word) ،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از متن دانلود مقاله Synthesis of ZnO/SnO2 Coupled Nanoparticles by Coprecipitation Method Under Ultrasonic Irradation and Study of Their Photocatalytic Activity فایل ورد (word) :

سال انتشار: 1387

محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو

تعداد صفحات: 2

چکیده:

In recent years, many studies have been focused on the photocatalytic degradation of organic compounds mediated by semiconductor particles, such as TiO2 and ZnO, acting as photocatalysts. Previous studies have proved that such semiconductors can degrade most kinds of persistent organic pollutants under ultraviolet (UV) light irradiation[1,2]. A photocatalytic process is based on the generation of electron-hole pairs by means of band-gap radiation that can give rise to redox reaction with the species adsorbed on the surface of photocatalysts. However, the fast recombination rate of the photogenerated electron/hole pairs hinders the commercialization of this technology. Various attempts have been made to reduce e- – h + recombination in photocatalytic processes. Coupled semiconductor photocatalysts may increase the photocatalytic efficiencyby increasing the charge separation and extending the photo-responding range[3]. The objective of the present study is to optimize the preparation for the coupled ZnO/SnO2 nanoparticles. For this purpose, a series of nanosized coupled ZnO/SnO2 photocatalysts with different Sn contents were prepared and their photocatalytic activities evaluated using C.I. Acid Red 27 (AR27) as a model organic contaminant

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