ZnO纳米棒阵列、纳米片及其发光和光催化特性

ZnO nanorod arrays and nanosheets,its photoluminescence and photocatalytic properties

首先通过溶胶-凝胶法在Si片基底上制备1层ZnO纳米薄膜,作为纳米棒的晶种层,然后利用金属浴沉积法在ZnO纳米薄膜基础上制备择优取向的ZnO纳米棒阵列,最后通过水热法二次成核结晶形成纳米片。研究证明,ZnO纳米棒阵列和纳米片均沿着c轴取向。在Cu2+抑制极性面生长的作用下,形成的ZnO纳米片结构均匀,分布面积广,单片ZnO纳米片的厚度约为8 nm,面积呈平方微米级,较大的有40μm2左右。ZnO纳米结构的生长取向对其物理化学性能具有重要影响。高度沿c轴取向的ZnO纳米棒有利于紫外光发射和激光器的发展,但极性面的缩小不利于光催化反应。

This paper prepared large scale ZnO nano-rod arrays and nano-sheets via sol-gel methods on Si sub-strates.We showed that the synthesized nano-arrays and nano-sheets grew along the (001)direction.With the Cu2+ blocking the growth of the polar surfaces,the nano-sheets looked structural homogenous and sized 8 nm in thickness and 40μm in area.The orientation of the nanostructures had significant influence on their physical-chemical performance.Strong orientation along the c-axis of nano-structured ZnO may be favorable for ultravio-let lasing,but may be disadvantageous to photo-catalytic reaction.