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利用水热法合成了铟掺杂的氧化锌(In-Zn O)纳米棒.X射线衍射(XRD)结果表明铟掺杂能导致氧化锌晶格膨胀.扫描电镜(SEM)结果显示,随着前驱液中铟浓度的增加,氧化锌纳米棒的长径比先减小后增大,在铟原子浓度为1.0%(原子分数,x),长径比达到最小值;随着前驱液中铟浓度继续增加,长径比增大.从晶体生长角度考虑,溶液中存在四羟基铟(In(OH)4-)生长基元,该生长基元可转化为铟替位掺杂(InZn)和羟基铟氧化物(In OOH)两种状态,二者之间存在竞争关系,共同引起长径比的非线性变化.当铟原子分数小于1.0%时,InZn是主要存在形式,其能破坏锌极性面,从而抑制(002)晶面的生长.当铟原子浓度高于1.0%时,生成微量的In OOH,其能起到晶粒粘结剂的作用,促进(002)面的生长.因此,可以通过改变前驱液中铟的浓度,调控氧化锌纳米棒的长径比.本文阐述了In-Zn O的生长机理,并提供一种制备实用的掺杂氧化锌纳米棒的方法.
Indium-doped zinc oxide (In-Zn O) nanorods were synthesized by hydrothermal method.The results of X-ray diffraction (XRD) showed that the doping of indium can lead to the lattice expansion of zinc oxide.The SEM results show that with the As the indium concentration in the precursor solution increases, the aspect ratio of the zinc oxide nanorods first decreases and then increases, reaching the minimum value when the indium atom concentration is 1.0% (atomic fraction, x); as the indium The concentration increases and the aspect ratio increases.From the point of view of crystal growth, there are four kinds of growth elements of In (OH) 4- in the solution, which can be transformed into indium substitution doping (InZn) and Indium oxide (InOOH) two states, there is a competition between the two, together cause the nonlinear change of aspect ratio.When indium atomic fraction is less than 1.0%, InZn is the main form of existence, which can damage the zinc pole (002) plane, and when the indium atom concentration is higher than 1.0%, a trace amount of InOOH is generated, which can act as a grain binder and promote the growth of the (002) plane. , The aspect ratio of zinc oxide nanorods can be controlled by changing the concentration of indium in the precursor solution.In this paper, the growth mechanism of In-Zn O and the preparation of a practical The method of the zinc oxide nanorods heteroaryl.