Lu Weiwei, Liu Guosheng, Gao Shuyan, Xing Shantao, Wang Jianji
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China. School of Chemistry and Environmental Science, Henan Key Laboratory of Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.
Nanotechnology. 2008 Nov 5;19(44):445711. doi: 10.1088/0957-4484/19/44/445711. Epub 2008 Sep 30.
In this paper, Ag/ZnO metal-semiconductor nanocomposites were prepared through a facile one-pot hydrothermal method with the assistance of tyrosine. The synthesized samples were structurally characterized by x-ray diffraction, scanning electron microscope, transmission electron microscope and x-ray photoelectron spectroscopy. It was shown that the added tyrosine served both as a shape conductor for the formation of ZnO faceted nanorods and as a reducing agent of Ag(+) ions. In the reaction process, the complexation of Ag(+) with NH(3) and OH(-) decreased the redox potential of Ag(+)/Ag, which prevented the formation of isolated Ag nanoparticles in solution. The prepared Ag/ZnO nanocomposites showed potential applications in photodegradation of organic dye pollutants and destruction of bacteria.
在本文中，通过简便的一锅水热法并借助酪氨酸制备了Ag/ZnO金属-半导体纳米复合材料。通过X射线衍射、扫描电子显微镜、透射电子显微镜和X射线光电子能谱对合成的样品进行了结构表征。结果表明，添加的酪氨酸既作为形成ZnO多面纳米棒的形状导向剂，又作为Ag(+)离子的还原剂。在反应过程中，Ag(+)与NH(3)和OH(-)的络合降低了Ag(+)/Ag的氧化还原电位，从而防止了溶液中孤立的Ag纳米颗粒的形成。所制备的Ag/ZnO纳米复合材料在有机染料污染物的光降解和细菌的杀灭方面显示出潜在的应用。
