Water Bath Synthesis ZnO Micro/Nano Structures

Nanomaterials have some physical and chemical properties different from the bulk materials, which makes the nano-materials as the most promising materials in the present. Zn O, with a wide direct band gap(3.37 e V), is a II-VI group metal oxide semicondutor. Compared with other wide bandgap semiconductor materials, Zn O has a high exciton binding energy, which is 60 me V at room temperature. Zn O is a n-type semiconductor, so it is often applied in photoelectric. Besides, Zn O micro/nano structure also has excellent properties in cathode field emission and photocatalytic. There are many methods to synthesize Zn O nano/micro structures, but some of them are intrict in the synthese instruments, and the controllability in the growth of Zn O nano/micro structures is not sufficient. In this paper, for realizing the controllable growth of Zn O nano/micro structures, a simple chemical water bath method was used to prepare Zn O nano/micro stuctures. The specific content of this paper is as follows:(1) We studied the morphology of products which was producted in the growth process of Zn O micro/nano structure under the condition of different water bath temperatures with the method of multiple containers, and the influence of annealing on the morphology of products. The results showed that when the temperatures of water bath were different, the morphology of products were different;After annealing, the crystal quality of the products had been improved.(2) Zn O micro/nano structure was synthesized by using different zinc source and alkali source. The results showed that when the zinc source and alkali source were different, the morphology of Zn O micro/nano structures was different. We synthesized Zn O-Cu2 O micro/nano structure with water bath and studied the impact of the amount of Cu2 O on photoluminescence spectra. We synthesized Zn1-xCuxO(x=0,0.05,0.1),Zn1-xMgxO(x=0,0.05,0.1), Zn1-xFexO(x=0,0.05,0.1) micro/nano structure with water bath and studied the impact of the amount of doping on photoluminescence spectra, Raman vibrational peak and particle size.(3) Zn O nanorods were synthesized combined water bath with seed, and Zn O seeds were synthesized in the way of Czochralski and drop. We successfully synthesized micro strip of Zn O nanorod arrays by means of Czochralski, and the diameter of nanorods was about 100-200 nm, and the length of nanorods was about 300-500 nm. At the same time, the orientation of the middle part of the micro strip nanorods was consistent, but the edge orientation was disorderly. We successfully synthesized clusters Zn O nanorods, Zn O nanotubes and small Zn O nanorods based on the big Zn O microrods, whose diameter was 100 nm. Their photoluminescence spectra only had an intrinsic emission peak.