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نویسندگان مقالات پربازدید :
مجله مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • preparation and characterization of magnetic core–shell znfe2o4@zno nanoparticles and their application for the photodegradation of methylene blue

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    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 770
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     magnetically separable znfe2o4@zno nanoparticles with enhanced photocatalytic activity were successfully synthesized by two steps. first, znfe2o4 nanoparticles (nps), which served as seeding materials, were synthesized using a solvothermal method. second, wurtzite zno was coated on the znfe2o4 particle surfaces on the basis of a chemical precipitation method. the as-prepared samples were characterized with x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem), high resolution transmission electron microscopy (hrtem) and energy-dispersive x-ray spectroscopy (eds). photodegradation experiments of the samples were carried out by choosing methylene blue (mb) as a model target under uv irradiation with homemade photocatalytic apparatus. the results indicated that the obtained core–shell znfe2o4@zno nps exhibited higher photocatalytic activity than pure zno. in addition, when the molar ratio of znfe2o4 to zno was 1:10, the obtained product showed the highest photocatalytic activity. furthermore, the core–shell znfe2o4@zno nps could be conveniently separated by using an external magnetic field and the photocorrosion of zno was inhibited to some extent.

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