CAJ | 학술논문

以CuCl2·2H2O,自制的GaCl3和(NH2)2CS为原料,在乙二醇体系中合成了花状结构的CuGaS2纳米晶.产物分别用X射线粉末衍射仪、透射电子显微镜、场发射扫描电子显微镜、高分辩透射电子显微镜和X射线光电子能谱仪进行了表征.实验结果表明,220℃反应24 h得到均匀的花状纳米结构CuGaS2,它是由厚度80～100 nm的片晶组成.同时,通过反应时间的控制,可以清楚的看到由纳米颗粒到纳米球以及花状纳米结构的演变过程.另外,研究了反应温度、反应时间、溶剂等对产物和形貌的影响.此外,对花状结构纳米晶的生长机理进行了初步的探讨.室温荧光光谱表明,随粒径的降低,发光位发生了部分蓝移.
이CuCl2·2H2O,자제적GaCl3화(NH2)2CS위원료,재을이순체계중합성료화상결구적CuGaS2납미정.산물분별용X사선분말연사의、투사전자현미경、장발사소묘전자현미경、고분변투사전자현미경화X사선광전자능보의진행료표정.실험결과표명,220℃반응24 h득도균균적화상납미결구CuGaS2,타시유후도80～100 nm적편정조성.동시,통과반응시간적공제,가이청초적간도유납미과립도납미구이급화상납미결구적연변과정.령외,연구료반응온도、반응시간、용제등대산물화형모적영향.차외,대화상결구납미정적생장궤리진행료초보적탐토.실온형광광보표명,수립경적강저,발광위발생료부분람이.
Using ethylene glycol as solvent and reductant, CuCl2·2H2O, (NH2)2CS and self-prepared GaCl3 as the starting materials, CuGaS2 nanostrucutures were synthesized on a large scale at 220 ℃. Powder X-ray diffraction,transmission electron microscopy, field-emission scanning electron microscope, high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy were used to characterize the products. It demonstrated the evolution of the CuGaS2 particles from spherical assemblies to flowerlike morphology, over time,at 220 ℃. Simultaneously, we elucidated the specific roles of reaction temperature, reaction time and solvent in the formation of the final CuGaS2 nanostructures. A possible formation mechanism of CuGaS2 nanostrucutures was also discussed. The room temperature photoluminescence spectrum showed blue-shift and an increase of intensity, with a decrease in the sizes of CuGaS2 particles.