纳米ZnO溶胶的制备及其光学性能

Preparation and optical property of nano-ZnO sol

以氯化锌和氢氧化钠为原料,采用多元醇法制备纳米ZnO溶胶。利用透射电镜、荧光光谱和紫外光谱对其进行表征,详细研究了水浴时间和pH值对纳米氧化锌形貌和光学性能的影响。结果表明:随着水浴处理时间的增长,纳米ZnO粒径有所增大,其紫外吸收光谱红移,紫外荧光增强,而黄-绿光荧光强度减弱。随着pH值的增大,纳米ZnO粒子的粒径逐渐减小,紫外吸收光谱蓝移,其紫外荧光逐渐增强。

NanceZnO sol was synthesized using ZnC12 and NaOH through polyol method. Morphology and optical property of nano-ZnO were characterized by TEM, PL and UV. The effects of different water bath time and pH on its mor- phology and optical property were investigated. The result showed that Nano-ZnO particle size had increased with the in- creasing of the water bath time, its UV absorption spectra showed re＆shifts, UV fluorescence intensity was enhanced, and yellow green fluorescence intensity was decreased. With the pH value was increased, the particle size of nano-ZnO gradually decreased, the UV absorption spectra showed blue-shifts, UV fluorescence intensity gradually increased.