硫化铋量子点的制备及其发光性能  

Synthesis and luminescence properties of Bi_2S_3 quantum dots

作　　者：安保礼[1] 朱小雅 徐甲强[1] AN Baoli;ZHU Xiaoya;XU Jiaqiang(College of Sciences,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学理学院,上海200444

出　　处：《上海大学学报（自然科学版）》2019年第2期227-234,共8页Journal of Shanghai University:Natural Science Edition

基　　金：国家留学基金访学资助项目(201606895003);上海市自然科学基金资助项目(12ZR1411100)

摘　　要：Bi_2S_3是环境友好的绿色材料.使用11-巯基十一烷酸作为形貌剂合成发光性能稳定的硫化铋量子点,其最大发射波长位于500 nm处,在空气中保存6个月以上发光性能保持不变.在合成过程中,硫代乙酰胺水解产生的S^(2-)与乙酰丙酮配体的交换机理起到控制硫化铋成核速度的作用,并对Bi_2S_3晶核的形成有定向作用. 11-巯基十一烷酸的巯基S原子与Bi_2S_3量子点表面的Bi^(3+)离子以Bi-S方式形成疏水层,使之能够稳定存在,同时作为长链配体,可防止Bi_2S_3量子点粒子之间发生团聚现象.Bismuth sulfide is considered as an environment-friendly material.Here,Bi2S3 quantum dots (Bi2S3 QDs) were synthesized with a new method using 11-mercaptoundecanoic acid as a capping agent.The Bi2S3 QDs showed stable properties over 6 months in the atmosphere.The maximum emission wavelength for Bi2S3 QDs was 500 nm.The ligand exchange process between S^2- and acetylacetonate was a critical step in the synthesis of Bi2S3 QDs.Spherical cores of Bi2S3 were formed by the nuclei due to the orientationdirected effect of acetylacetonate.The Bi^3+ ions at the surfaces of Bi2S3 QDs were capped by 11-mercaptoundecanoic acid molecules that could efficiently stabilize the Bi2S3 QDs.

关 键 词：硫化铋 量子点 发光 溶剂热法 

分 类 号：O628.3[理学—有机化学]