Synthesis and morphology-dependent antimicrobial activity of cerium doped flower-shaped ZnO crystallites under visible light irradiation
Synthesis and morphology-dependent antimicrobial activity of cerium doped flower-shaped ZnO crystallites under visible light irradiation
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可见光照射下掺铈花状ZnO微晶的合成及其形貌依赖性抗菌活性
DOI：
10.1016/j.colsurfa.2016.07.016
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发表时间：
2016-10-05
影响因子：
5.2
通讯作者：
Ma, Jianzhong
中科院分区：
文献类型：
--
作者：
Hui, Aiping;Liu, Junli;Ma, Jianzhong
以六水硝酸锌为锌源，九水硝酸铈（III）为掺杂剂，采用微波辅助水热法制备了Ce掺杂的花状ZnO晶体。采用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、比表面积测定（BET）、能谱仪（EDS）和紫外-可见漫反射光谱（UV-vis diffuse reflectance spectroscopy，UV-vis diffuse reflectance spectroscopy，UV-vis diffuse reflectance spectroscopy）对样品进行了表征。样品对白色念珠菌（C. albicans）和黄曲霉（A. flavus）与纯ZnO在可见光照射下的光致发光性能进行了比较。结果表明，随着铈含量的增加，花状ZnO微晶的晶体结构发生了变化。此外，随着铈离子的加入，ZnO微晶的禁带宽度减小，结晶度提高。特别地，增加铈掺杂剂的水平超过0.8%导致光学带隙（3.06 eV）减小和对C的抗微生物活性增强。白色念珠菌（75%）和A.黄绿色（80%）。(C)© 2016 Elsevier B. V.版权所有。
Cerium doped flower-shaped ZnO crystallites were prepared via a facile microwave-assisted hydrothermal method with zinc nitrate hexahydrate as zinc sources, cerium (III) nitrate nonahydrate as dopant. The obtained samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Brunauer-Emmett-Teller surface area measurement (BET), energy dispersive spectroscopy (EDS) and UV-vis diffuse reflectance spectroscopy. Antimicrobial activity of the samples against Candida albicans (C. albicans) and Aspergillus flavus (A. flavus) was compared with, pure ZnO under visible light sources. The results indicated that cerium doped flower-shaped ZnO crystallites had different crystal structure with the increased levels of cerium content. Besides, the band gap of ZnO crystallites decreased and its crystallinity increased with the adding of cerium ion. In particular, increasing levels of the cerium dopant more than 0.8% results in decreased optical band gap (3.06 eV) and enhanced antimicrobial activity against C. albicans (75%) and A. flavus (80%) under visibler light sources. (C) 2016 Elsevier B.V. All rights reserved.