Shape-controlled synthesis and photocatalytic properties of three-dimensional and porous zinc oxide
Shape-controlled synthesis and photocatalytic properties of three-dimensional and porous zinc oxide
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DOI：
10.1016/j.jallcom.2010.12.073
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发表时间：
2011-02
影响因子：
6.2
通讯作者：
Peiyan Ma;Y. Wu;Z. Fu;Weimin Wang
中科院分区：
文献类型：
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作者：
Peiyan Ma;Y. Wu;Z. Fu;Weimin Wang
在这项研究中，我们报道了一种方法，通过一个简单的基于溶液的方法，使用柠檬酸盐作为晶体生长调节剂，大规模生长大孔氧化锌。采用X射线衍射、扫描电子显微镜、红外光谱、紫外-可见光谱和N2-物理吸附等技术对样品的微观结构进行了研究。讨论了前驱体中Zn 2+的阴离子种类、柠檬酸钠的加入顺序、柠檬酸钠浓度和反应时间对ZnO形貌的影响。通过对ZnO纳米球生长过程的研究发现，柠檬酸根离子与ZnO之间的相互作用是形成复合结构的关键，同时伴随着醋酸根离子的诱导作用，形成了高质量的大孔球。与常规尺寸的氧化锌相比，UV-Vis结果显示出蓝移。多孔ZnO的大比表面积增强了对罗丹明B的吸附，提高了光催化活性。
In this study, we reported a method for growing macroporous ZnO on a large scale via a facile solution-based method using citrate as crystal growth modifier. The microstructures were studied by X-ray diffraction, scanning electron microscopy, FT-IR, UV–visible spectrometer and N2-physisorption techniques. Influencing factors on the morphology of ZnO were discussed, including anion species of Zn2+precursor, adding sequence of sodium citrate, sodium citrate concentration and reaction time. On the basis of the investigation on the growth process, citrate ion–ZnO interaction was vital to the formation of complex structure, which was accompanied by acetate ion induction to form the high-quality macroporous spheres. UV–Vis results exhibited a blue-shift when compared with conventional-sized zinc oxide. The large specific surface area of porous ZnO resulted in enhanced absorption of Rhodamine B and improved photocatalytic activity.