微波辅助合成ZnS∶Ce纳米晶  

Microwave-assisted synthesis of ZnS∶Ce nanocrystals

作　　者：田修营[1] 文瑾[1] 姚俊兰[1] 胡继林[1] 彭红霞[1] 陈占军[1] 彭秧锡[1] 

机构地区：[1]湖南人文科技学院材料与环境工程学院精细陶瓷与粉体材料湖南省重点实验室,娄底417000

出　　处：《化工新型材料》2017年第3期175-177,共3页New Chemical Materials

基　　金：湖南省教育厅科研项目(14C0607);湖南省教育厅重点科研项目(14A076);湖南省自然科学基金(2016JJ4044);国家自然科学基金(51602101);湖南省科技计划项目经费资助(2016TP1028)

摘　　要：以乙酸锌为锌源、硫酸高铈为铈源、硫代乙酰胺为硫源、淀粉为分散剂,微波辅助合成了ZnS∶Ce纳米晶。通过X射线衍射仪、红外光谱仪、荧光分光光度计和激光粒度分析仪对其物相结构、原子键价结构、光学性能和颗粒粒径大小进行了表征分析。研究了不同Ce离子掺杂量对产品结构和光学性能的影响。结果表明:所制备的ZnS∶Ce纳米晶体具有闪锌矿立方相结构,其晶粒大小分布范围为3.5~4.5nm;颗粒大小范围为100~600nm,D50=290nm。激发波长为230nm时,其荧光发射峰在408nm处;掺杂Ce离子浓度增加,ZnS∶Ce纳米晶材料的荧光强度降低,其原因是发生了浓度淬灭现象。Using zinc acetate as the zinc source,ceric sulfate as the cerium source,thioacetamide as sulfur source and starch as a dispersing agent,ZnS∶Ce nanocrystals were prepared via microwave-assisted synthesis.The phase structure,atomic bond valence structure,optical properties and particle size were characterized by X-ray diffraction（XRD）,fourier transform infrared spectrometer（FT-IR）,fluorescence spectrophotometer and laser particle size analyzer.The effects of different Ce ion doping amount on the structure and optical properties of product were investigated.The results showed that the sample were ZnS∶Ce with sphalerite cubic phase structure and the crystallite sizes were in 3.5~4.5nm.Particle size was in 100~600nm and D50=290nm.When the excitation wavelength was 230 nm,the fluorescence emission peak was at408 nm.With increase of the concentration of Ce ions,the fluorescence intensity of Ce-doped sample were lower,ascribed to the concentration quenching phenomenon.

关 键 词：半导体 ZnS∶Ce XRD FT-IR 晶体结构 

分 类 号：TB383.1[一般工业技术—材料科学与工程]