Structural, electrochemical and magnetic properties of codoped (Cu, Mn) CdS nanoparticles with surfactant PVP

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• 作者：Muruganandam S.p>ap> ; Anbalagan G.p>bp>p> ; p>p>anbu24663@yahoo.co.inp>p> ; p>p>anbu24663@gmail.comp> ; Murugadoss G.p>cp>
• 关键词：CdS ; Cu2+ ; Mn2+ ; Nanoparticles ; Photoluminescence ; Cyclic voltammetry ; EPR
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：131
• 期：Complete
• 页码：826-837
• 全文大小：1969 K
• 卷排序：131

文摘

PVP capped with (Cu2+, Mn2+) codoped CdS and undoped nanoparticles were prepared by chemical precipitation method. The XRD patterns revealed that codoped CdS nanoparticles exhibit in cubic hawleyite mixed with hexagonal greenockite phase. The functional groups of the capping agent on codoped CdS surface were identified by FTIR. The UV–visible absorption spectra show significantl blue shift (501–514 nm) and second excitonic absorption peak 241 nm was observed only in the presence of a narrow size distribution. The increased optical band gap confirms the presence of quantum confinement. The photoluminescence (PL) emission spectrum shows emission line in the blue region. The emission band reveals that the measured band gap of around 2.7 eV is greater than that of bulk CdS (2.42 eV). T The average g–value, total number of spins (Ns) and covalency parameter (α2) were calculated from EPR results. The Cyclic Voltammetry curve of cathodic and anodic peaks shifted slightly to negative and positive potentials, respectively for electrode applications.