摘要
室温下将乙酸锌和三乙胺的水溶液超声辐照30min,制得三维的多角星形半导体ZnO微晶。粉体用XRD、FESEM、TEM和EDS进行了表征。结果表明:粉体ZnO为六方纤锌矿相结构的多角星形微晶,星形结构由纳米锥组装而成,纳米锥由微小的纳米粒子构筑而成。改变超声时间和三乙胺浓度的对比实验跟踪了晶体的生长过程,分析了可能的反应机理。粉体室温下的PL表明在387nm处有一弱的紫外发射峰,在561nm处出现强且宽的黄色发光带,黄光是与间隙氧(填隙氧)有关的深能级缺陷发光引起的。
Three dimensional （3D） multigonal star-shaped semiconductor ZnO microcrystal have been successfully obtained through ultrasound irradiating the mixture aqueous solution of Zn（CH3COO）2·2H2O and triethylamine （（CH2CH3）3N） for 30 rain at room temperature. The as-obtained powder was characterized by XRD, FESEM, TEM and EDS. The experimental results indicate that the muhigonal star-shaped ZnO with hexagonal wurtzite structure were composed of some nanocones which were self-assembled by nanopartieals. The possible formation mechanism associated with the sonochemical effect of ultrasound times and triethylamine concentrations is discussed. The room temperature PL spectrum showed a weak UV emission and a strong broad yellow emission with peak located at 387 nm and 561 nm respectively. The deep-level involved in the yellow luminescence is attributed to interstitial oxygen.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第3期469-473,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.20501002)
安徽省教育厅自然科学基金(No.2005KJ110)
安徽省高校青年教师科研资助计划(No.2005jq1147zd)项目资助
关键词
ZNO
半导体
超声化学
多角星
zinc oxide
semiconductor
sonochemistry
multigonal star
