Controllable synthesis of ZnO nanoparticles and their morphology-dependent antibacterial and optical properties
Controllable synthesis of ZnO nanoparticles and their morphology-dependent antibacterial and optical properties
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DOI：
10.1016/j.jphotobiol.2013.01.004
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发表时间：
2013-03-05
影响因子：
5.4
通讯作者：
Doudi, Monir
中科院分区：
文献类型：
--
作者：
Talebian, Nasrin;Amininezhad, Seyedeh Matin;Doudi, Monir
采用溶剂热法，在没有任何催化剂、模板剂和表面活性剂的条件下，利用不同的溶剂合成了不同形貌的ZnO材料。ZnO样品用于灭活MilliQ水中的革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌。还测试了样品降解偶氮染料酸性橙子74（CI 18745）的光催化活性。XRD数据表明，在不同的溶剂中得到的ZnO为纤锌矿结构，但生长习性不同。SEM图像表明，花状，棒状和球形的ZnO时，分别使用水，正己醇，乙二醇作为溶剂，生产。通过紫外-可见吸收光谱和光致发光光谱研究了所制备的ZnO材料的光学性质。细菌细胞的生理状态、ZnO样品的形貌和晶体生长习性、粒径大小和光学性质等因素影响其抗菌效果。结果表明，花状氧化锌对大肠杆菌的光催化活性明显高于棒状和球状氧化锌。coli与S.金黄色。结果表明，随着ZnO晶粒尺寸的减小，其抗菌活性增强。光照条件下两种微生物的灭活效率均高于黑暗条件下的灭活效率。根据ZnO粉末的形貌、光学和结构性质作为光催化和抗菌活性的关键参数，对所得结果进行了讨论。(C)2013爱思唯尔有限公司版权所有。
ZnO materials with different morphologies have been synthesized via a simple solvothermal method using different solvents without any catalysts, templates or surfactants. The ZnO samples are employed in the inactivation of gram-negative Escherichia coli and gram-positive Staphylococcus aureus in MilliQ water. The photocatalytic activities of samples to degrade an azo dye, Acid Orange 74 (CI 18745), were also tested. XRD data showed that single-phase ZnO with the wurtzite crystal structure but different growth habits were obtained in the different solvents. SEM imaging illustrated that ZnO with flower-like, rod-like, and spherical shape were produced when water, 1-hexanol, and ethylene glycol were used as the solvent, respectively. The optical properties of the as-prepared ZnO materials were investigated by UV-vis absorption and photoluminescence spectra. The antibacterial efficiencies were affected by the physiological status of the bacterial cells, different morphologies and crystal growth habits, particle size and optical properties of ZnO samples. Results indicate that ZnO flower-like showed significantly higher photocatalytic inactivation than ZnO rod- and sphere-like against E. coli compared with S. aureus. It was found that the antibacterial activity of ZnO increased with decreasing crystallite size. The inactivation efficiencies for both organisms under light conditions were higher than under dark conditions. The obtained results were discussed according to the morphologies, optical and structural properties of ZnO powders as key parameters in photocatalytic and antibacterial activity. (C) 2013 Elsevier B.V. All rights reserved.