化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 73-76.

新材料与新技术

多晶ZnO纳米粉的制备及发光性能研究

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作者信息 +

Preparation and luminescency of polycrystalline ZnO nanopowder

Xu Zhuoyue^1,2, Huang Jinliang¹, Li Lihua¹, Li Qian¹, Gu Yongjun¹

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文章历史 +

Received		Published
2017-09-15		2019-02-20
Issue Date	Revised Date
2019-03-18	2017-09-15

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摘要

以六水硝酸锌[Zn(NO₃)₂·6H₂O]为锌源,采用溶胶-凝胶法合成多晶氧化锌(ZnO)纳米粉,并通过不同的热处理温度退火来调整ZnO纳米粉的尺寸和形貌。并对多晶ZnO纳米粉的物相、形貌及荧光性能进行分析。研究结果表明:所得样品均为具有六方相纤锌矿结构的多晶ZnO纳米粉;随着热处理温度的升高,多晶ZnO纳米粉的粒径先减小后增大,其发光强度先增大后减小,在450℃条件下,粒径最小为20nm,且均匀,光致发光光谱强度最强位置为469nm,在650℃条件下,粒径最大为82nm,且不均匀,光致发光光谱强度最弱位置为398nm。

Abstract

Polycrystalline ZnO nanopowders were synthesized used Zn(NO₃)₂·6H₂O as zinc source by sol-gel method,and their size and morphology were adjusted by annealing at different temperatures.XRD,TEM,SAED,TG,PL and other means were used to analyze the phase,morphology and fluorescence properties of nanopowders.The results showed that the samples were polycrystalline ZnO nano powders with six phase wurtzite structure.The particle size decreased firstly and then increased,and the emission intensity increased first and then decreased with the increase of heat treatment temperature.Among them,the smallest particle size was 20nm and uniform,the strongest position of photoluminescence spectrum intensity was 469nm at the temperature of 450℃.The largest particle size was 82nm and uneven,the weakest position of photoluminescence spectrum intensity was 398nm at the temperature of 650℃.

关键词

溶胶-凝胶法 / ZnO纳米粉 / 纤锌矿 / 光致发光

Key words

sol gel method / ZnO nanopowder / wurtzite structure / photoluminescence

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