摘要
以尿素为燃料,硝酸锌作为锌源和氧化剂,硝酸铕提供掺杂离子,以微波诱导燃烧法合成了铕掺杂氧化锌纳米材料。并考察了尿素用量、微波功率、稀土离子掺杂量对产物性能的影响。采用XRD,SEM,PL等测试方法对产物进行了表征。实验结果表明:当微波功率为340 W,燃料恰好完全反应,反应物硝酸锌与硝酸铕物质的量之比为1∶1时得到产品的结晶度高,光学性能最好;根据谢乐公式计算一次粒子平均粒径约为50 nm,晶相与标准立方相氧化锌衍射峰非常吻合。PL测试结果表明,362 nm处出现的紫外发射峰是由于氧化锌的紫外发射峰发生蓝移造成,而451 nm、468 nm、482 nm处的蓝光发射峰可能是由于氧空位形成的浅施主能级向价带跃迁引起的。
Eu-doped ZnO nanomaterials were synthesized by microwave-induced combustion method using urea as main fuel, zinc nitrate as source of zinc and oxidant, and europium nitrate as source of dopant ions. The effects of microwave power, amount of urea and ratio europium nitrate to zinc nitrate on the properties of synthesized sample were investigated. X-ray diffraction （XRD） , scanning electron microscope （SEM） ,photoluminescence （PL） were used to characterize the properties of the sample, respectively. The experimental results show that ZnO nanomaterials with cubic ZnO crystal phase with best optical property are obtained at 340 W when molar ratio of the zinc nitrate to europium nitrate is 1 ： 1 and fuel just completely reaction. The average primary granularity of the synthesized sample is about 50 nm according to Scherrer equation. PL test results indicate that the UV emission peak in 362 nm is due to the the blue shift of ZnO UV emission peak. However, it＇s likely that blue light emission peaks in 451 nm,468 nm and 482 nm are inspired by shallow benefactor level formed by oxygen vacancies jumping to valence hand.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2012年第5期1317-1322,共6页
Bulletin of the Chinese Ceramic Society
基金
重庆大学研究生创新基金(201005AIA0010332)
中央高校基本科研业务费(CDJXS10221136)资助
关键词
微波诱导燃烧法
稀土离子
氧化锌纳米材料
microwave-induced combustion method
rare-earth ions
ZnO nanomaterials
