以Na2TeO3为碲源制备CdTe纳米晶及其表征

本文以巯基乙酸作为稳定剂，在水相中制备了CdTe纳米晶。以亚碲酸钠作为碲源，从而避免了以H2Te或NaHTe（用碲粉和硼氢化钠合成）作为碲源时，需要氮气或其它气体作为保护气体的过程，简化了制备工艺，并且提高了CdTe纳米晶的产量。用X射线衍射仪（XRD）、透射电镜（SEM）和荧光分光光度计对其进行了表征。分析表明CdTe纳米晶为立方相，并且有较窄的荧光发射峰。详细探讨了反应时间、pH值及前驱物浓度对CdTe纳米晶荧光性能的影响。

Characteristics of CdTe nanocrystals synthesized by a Na2TeO3 source

Water-soluble cadmium telluride (CdTe) nanocrystals were synthesized in aqueous solution with thioglycolic acid (TGA) molecules as a stabilizer. A series of TGA-stabilized CdTe nanocrystals were prepared using sodium tellurite as a tellurium source, which avoids the cumbersome processes associated with H₂Te or NaHTe sources. The synthesized TGA-stabilized CdTe were characterized with X-ray diffraction, TEM and fluorescence spectrophotometer. The particles crystallized predominantly in cubic phase with narrow photoluminescence emission. The effects of reaction time, pH value, and precursor concentration on the photoluminescence properties were investigated in detail.