超声水浴辅助溶胶-凝胶模板法制备ZnO纳米线阵列

Preparation of ZnO Nanowire Arrays by the Sol-Gel Template Method Assisted with Water Bath and Supersonic Treatment

采用超声水浴辅助溶胶-凝胶阳极氧化铝(AAO)模板法制备了ZnO纳米线阵列,通过扫描电子显微镜(SEM)、能量色散X射线谱(EDS)、X射线衍射谱(XRD)对制备的纳米线阵列的微观形貌和晶体结构进行了表征.实验结果表明:相比于负压抽滤过程,超声水浴过程可以有效促进更大浓度的溶胶(接近100%)进入AAO模板孔洞内形成致密性较好的ZnO纳米线;所制备的ZnO纳米线排列整齐、粗细均匀,直径大小约为200 nm,受控于所用AAO模板的孔径,形成阵列结构;纳米线为多晶六方纤锌矿结构,平均晶粒尺寸约为21.6 nm,小于相同条件下粉末的平均晶粒尺寸32.1 nm.该方法具有制备工艺简单、成本低、重复性好等优点,可应用于各种材料的纳米线阵列的制备.

ZnO nanowire arrays are prepared by the sol-gel anodic aluminum oxide(AAO)template method assisted with supersonic treatment and water bath process.The micromorphology and crystal structure of ZnO nanowire arrays are characterized by scanning electron microscope(SEM),energy disperse X-ray spectroscope(EDS),and X-ray diffraction spectroscopy(XRD).The experiment results show that compared with the negative pressure extraction process,the supersonic treatment and water bath process can effectively promote the higher concentration solution(up to nearly 100%)into the pore of the AAO template,resulting in ZnO nanowires with better density.The prepared ZnO nanowires are neatly arranged and quite uniform in diameter about 200 nm,controlled by the pore diameter of the AAO template,forming an array structure.The ZnO nanowires are found in polycrystalline hexagonal wurtzite structure,and the grain size is about 21.6 nm,less than the powder grain size of 32.1 nm under the same conditions.This method has the advantages of simpleness,low cost and good repeatability,and can be applied to the preparation of other nanowire arrays of various materials.