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不同纵横比ZnO纳米锥的可控合成及其光催化性能
Controllable Synthesis and Photocatalytic Activity of Zn O Nano-cones with Different Aspect Ratio
【摘要】 在醋酸锌-正丁胺-四氢呋喃/乙醇溶剂热体系中改变正丁胺用量和反应温度,实现了不同纵横比Zn O纳米锥的可控合成,使用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、透射电子显微镜(TEM)及紫外-可见漫反射光谱(UV-Vis DRS)等手段对其形貌和结构进行表征,提出了Zn O纳米锥的生长机理。以甲基橙(MO)为目标降解物,研究了Zn O纳米锥的光催化活性。结果表明:与商业Zn O粉末相比,纳米锥表现出较高的反应活性。纵横比小的Zn O纳米锥具有的高催化活性,因为其结构中活性{001}晶面所占的比例较大。
【Abstract】 Zn O nano-cones with various aspect ratios were synthesized via a solvothermal reaction of zinc acetate with n-butylamine and tetrahydrofuran or ethanol by varying dosage of n-butylamine and temperature. The possible growth mechanism was proposed. The products were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), transmission electron microscopy(TEM) and ultraviolet-visible diffuse reflectance spectroscopy(UV-vis DRS). Photocatalytic activity of Zn O nano-cones in degradation of methyl orange(MO) was investigated, and the results show that Zn O nano-cones show superior photoreactivity, compared to Zn O powders as a benchmarking. The superior intrinsic photocatalytic activity can be attributed to the high percentage of exposed {001} facets of Zn O nano-cones with small aspect ratio.
【Key words】 nano-materials; Zn O nano-cones; controlled synthesis; formation mechanism; photocata lytic activity; reactive facets;
- 【文献出处】 材料研究学报 ,Chinese Journal of Materials Research , 编辑部邮箱 ,2017年08期
- 【分类号】TN304.21
- 【被引频次】7
- 【下载频次】123