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مجله مهندسی شیمی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • fabrication of high dispersion pd/mwnts nanocomposite and its electrocatalytic performance for bromate determination

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 742
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     pd nanoparticles decorated multiwall carbon nanotubes (pd/mwnts) catalyst was synthesized by in situ chemical method and its application for the determination of bromate was investigated. the morphology and composition of the pd/mwnts catalyst was characterized by transmission electron microscopy (tem), energy dispersive x-ray spectroscopy (edx) and x-ray photoelectron spectroscopy (xps). the analyses indicate that pd nanoparticles in metallic-state were homogeneously deposited on mwnts with an average diameter of 4.5 nm. the electrocatalytic activity of pd/mwnts for the reduction of bromate was investigated by cyclic voltammetry (cv). an obvious peak corresponding to the bromate reduction was obtained between 0.15 and −0.25 v. effects of different factors including scan rate, temperature and initial concentration of bromate ions on bromate determination were studied as well. a good linear relationship between the values of reduction peak and bromate concentration was obtained. chronoamperometric measurement showed that the pd/mwnts modified electrode could be successfully employed as an amperometric sensor for bromate in a wide concentration range (0.1–40 mm) within a short response time (5 s), and the sensitivity of this sensor is 768.08 μa mm−1 cm−2. the results reported herein indicate that the pd/mwnts have a potential application in fabrication of bromate detector.

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