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

作　　者：陈燕[1] 张萍[1] 尚永辉[1] 王晓玲[1] CHEN Yan ZHANG Ping SHANG Yonghui WANG Xiaoling(Chemistry and Chemical Engineering School, Xianyang Normal University, Xianyang 712000, China)

机构地区：[1]咸阳师范学院化学与化工学院,咸阳712000

出　　处：《材料研究学报》2017年第8期619-626,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(21305117和21475113);陕西省自然科学基金(2012JQ2014和2017JQ2043);咸阳师范学院化学与化工学院科技成果转化项目(XSYHGKZ1701)~~

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。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.

关 键 词：纳米材料 ZN O纳米锥 可控合成 形成机理 光催化 活性晶面 

分 类 号：O649[理学—物理化学]