文章基本信息

标题：A comparative study of ZnAl2O4 nanoparticles synthesized from different aluminum salts for use as fluorescence materials
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作者：Shi-Fa Wang ; Guang-Zhuang Sun ; Lei-Ming Fang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep12849
语种：English
出版社：Springer Nature
摘要：Three ZnAl₂O₄ samples were prepared via a modified polyacrylamide gel method using a citric acid solution with different aluminum salt starting materials, including AlCl₃∙6H₂O, Al₂(SO₄)₃∙18H₂O, and Al(NO₃)₃∙9H₂O under identical conditions. The influence of different aluminum salts on the morphologies, phase purity, and optical and fluorescence properties of the as-prepared ZnAl₂O₄ nanoparticles were studied. The experimental results demonstrate that the phase purity, particle size, morphology, and optical and fluorescence properties of ZnAl₂O₄ nanoparticles can be manipulated by the use of different aluminum salts as starting materials. The energy bandgap (Eg) values of ZnAl₂O₄ nanoparticles increase with a decrease in particle size. The fluorescence spectra show that a major blue emission band around 400 nm and two weaker side bands located at 410 and 445 nm are observed when the excitation wavelength is 325 nm. The ZnAl₂O₄ nanoparticles prepared from Al(NO₃)₃∙9H₂O exhibit the largest emission intensity among the three ZnAl₂O₄ samples, followed in turn by the ZnAl₂O₄ nanoparticles prepared from Al₂(SO₄)₃∙18H₂O and AlCl₃∙6H₂O. These differences are attributed to combinational changes in Eg and the defect types of the ZnAl₂O₄ nanoparticles.