以亚碲酸钠为碲源,硼氢化钠为还原剂,一步合成了巯基丁二酸(MSA)稳定的CdTe量子点.研究了反应液pH值、镉与碲的摩尔比及镉与巯基丁二酸的摩尔比等实验条件对CdTe量子点体系荧光量子产率的影响,并用荧光光谱、X射线粉末衍射及透射电子显微镜等对其进行了表征.结果表明,CdTe量子点具有闪锌矿结构,形貌呈球状；在pH=10.5,n(Cd2+)∶n(Te2-)∶n(MSA)=1∶0.05∶1.4的条件下,制备的各种发光颜色的量子点都具有较高的荧光量子产率,最高值可达73.3％.%A novel technology was developed for the synthesis of mercaptosuccinic acid ( MSA) -capped CdTe quantum dots( QDs) when sodium tellurite worked as a tellurium source and sodium borohydride acted as a re-ductant. The influences of various experimental variables, including pH value, Cd/Te and Cd/MSA molar ratios, on the photoluminescence(PL) quantum yield (QY) of the prepared CdTe QDs were systematically investigated. The obtained QDs were characterized by photoluminescence spectroscopy, X-ray powder diffraction (XRD) and transmission electron microscopy ( TEM). The results show that the CdTe QDs are of zinc-blended crystal structure in a sphere-like shape; various luminescent CdTe QDs with high emission efficiency( maximum quantum yield of 73. 3% ) can be prepared at pH = 10. 5 and n ( Cd2+ ) : n( Te2- ) : n(MSA)= 1:0.05:1.4.
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