Influence of Mn Doping on the Microstructure and Optical Properties of ZnS Nanocrystals

Abstract:

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ZnS nanoparticles with Mn2+ doping (0–2.5%) were prepared through a simple chemical method. The nanostructures of the prepared undoped ZnS and Mn2+-doped ZnS:Mn nanoparticles had been characterized by X-ray power diffraction (XRD), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), photoluminescence spectra (PL) and UV–vis absorption spectra. The mean size of the particles was found to be approximately 3-5 nm through XRD measurements, TEM and the UV–vis absorption spectra. It was found that the Mn2+ 4T16A1 emission intensity of ZnS:Mn nanoparticles was significantly enhanced with the increase of Mn2+ concentration, which arrived a maximum value when Mn2+ initial doping concentration was 1.5%. Continue increasing the Mn2+ concentration, namely more than 1.5%, the Mn2+ 4T16A1 emission intensity became weakened. And the resultant ZnS:Mn nanoparticles exhibited high efficiency for degrading methylene blue under UV light irradiation.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

1169-1175

DOI:

10.4028/www.scientific.net/AMR.189-193.1169

Citation:

H. M. Wang et al., "Influence of Mn Doping on the Microstructure and Optical Properties of ZnS Nanocrystals", Advanced Materials Research, Vols. 189-193, pp. 1169-1175, 2011

Online since:

February 2011

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$35.00

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