Control of ZnO morphology via a simple solution route
Control of ZnO morphology via a simple solution route
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DOI：
10.1021/cm020077h
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发表时间：
2002-10-01
影响因子：
8.6
通讯作者：
Yan, CH
中科院分区：
文献类型：
--
作者：
Zhang, J;Sun, LD;Yan, CH
通过在不同溶剂中分解Zn（OH）（4）（2-）或Zn（NH3）（4）（2+）前驱体，在合适的反应条件下合成了具有多种形貌的氧化锌。以Zn（OH）4（2-）为前驱体，在180 ℃的水中反应13 h，得到了由纳米棒组成的花状ZnO。而用正庚烷代替溶剂则得到雪花状ZnO。Zn（OH）（4）（2-）和Zn（NH3）（4）（2+）在乙醇中于100 ℃分解13 h，分别得到了棱柱状和刺状球形ZnO。在180 ℃条件下制备棒状ZnO，并与制备多刺球形产物的条件相同。除了这些典型的样品，在其他形态的ZnO进行了研究，通过改变我们的溶液路线的反应条件，操纵。系统的条件依赖性实验进行了全面的比较，揭示了ZnO纳米微晶和聚集体的形成和详细的生长过程。通过X射线衍射、透射电子显微镜和扫描电子显微镜研究表明，溶剂、前驱体、溶液碱度、反应温度和反应时间是影响ZnO形貌的主要因素。
By decomposing Zn(OH)(4)(2-) or Zn(NH3)(4)(2+) precursor in various solvents at suitable reaction conditions, zinc oxide with a diversity of well-defined morphologies was synthesized. Flowerlike ZnO built up by nanorods was obtained by treating Zn(OH)(4)(2-) precursor in water at 180 degreesC for 13 h. Whereas a replacement of the solvent by n-heptane yields snow flakelike ZnO. The prismlike and the prickly spherelike ZnO were also prepared, respectively, by decomposing Zn(NH3)(4)(2+) or Zn(OH)(4)(2-) in ethanol at 100 degreesC for 13 h. The rodlike ZnO was produced at 180 degreesC under the same condition for preparing prickly spherelike product. Besides these typical samples, ZnO in other morphologies was studied manipulatively by changing the reaction conditions of our solution route. Systematical condition-dependent experiments were compared comprehensively to reveal the formation and detailed growth process of ZnO nanosized crystallites and aggregates. The experimental results studied by X-ray diffraction, transmission electron microscopy, and scanning electron microscopy indicated that the solvent, precursor, solution basicity, and reaction temperature as well as time are responsible for the variations of ZnO morphologies.