Preparation of Diphenylcarbazide-Directed Cd Se Quantum Dots and Selective Determination for Cr(Ⅵ)
来源期刊:Journal Of Wuhan University Of Technology Materials Science Edition2016年第5期
论文作者:石岩 SUN Ken
文章页码:972 - 976
摘 要:Cd Se quantum dots(QDs) were synthesized using diphenylcarbazide(DL) to sequester QDs precursors(Cd2+) in situ. Fluorescence(FL) analysis showed the successive synthesis of QDs could be realized by capping with DL and the binding between DL and Cd2+. The average QDs particle size was about 5-20 nm by high-resolution transmission electron microscopy(HRTEM). Fourier transform infrared(FT-IR) spectra showed that Cd Se QDs could be chemically bonded with DL. The formation of QDs-DL-Cr(Ⅵ) could lower the fluorescence intensity of QDs. In a certain concentration range, the fluorescence intensity and Cr(Ⅵ) concentration presented a linear relationship. As a result, this phenomenon could be used to determine the Cr(Ⅵ) concentration in the range of 0-24 ×10-6 mol· L-1.
石岩1,2,SUN Ken1
1. School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power2. Farmland Irrigation Research Institute,CAAS
摘 要:Cd Se quantum dots(QDs) were synthesized using diphenylcarbazide(DL) to sequester QDs precursors(Cd2+) in situ. Fluorescence(FL) analysis showed the successive synthesis of QDs could be realized by capping with DL and the binding between DL and Cd2+. The average QDs particle size was about 5-20 nm by high-resolution transmission electron microscopy(HRTEM). Fourier transform infrared(FT-IR) spectra showed that Cd Se QDs could be chemically bonded with DL. The formation of QDs-DL-Cr(Ⅵ) could lower the fluorescence intensity of QDs. In a certain concentration range, the fluorescence intensity and Cr(Ⅵ) concentration presented a linear relationship. As a result, this phenomenon could be used to determine the Cr(Ⅵ) concentration in the range of 0-24 ×10-6 mol· L-1.
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