| 均匀沉淀法制备单分散纳米ZnS及发光性能 |
| Preparation and Luminescent Performance of Monodispersed ZnS Nanoparticle by Homogeneous Precipitation Method |
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| 摘要: 采用均匀沉淀法，乙酸锌和硫代乙酰胺(TAA)分别提供Zn源和S源，无水乙醇为分散介质，十八胺(ODA)为分散剂，成功制备了小于50 nm的单分散ZnS纳米颗粒，并就反应温度、分散剂浓度、溶液浓度和陈化时间对ZnS纳米颗粒粒径的影响进行系统研究。用SEM、激光纳米粒度仪、XRD、PL、EL对样品进行了表征，结果表明：维持一定的分散剂和溶液浓度于0 ℃陈化24 h，样品粒径最小且结晶度佳，干燥和退火后的发光样品在275 nm的紫外光激发下发射出490 nm左右的蓝绿光，在2 kV(样品厚度1 mm)激励下发射出520 nm的绿光。 |
| 关键词: ZnS 均匀沉淀法 单分散 光致发光 电致发光 |
| 基金项目: |
| Abstract: Taking zinc acetate and TAA as precursors, dehydrated alcohol as dispersing medium, and ODA as dispersant, monodispersed ZnS nanoparticle with diameter of less than 50 nm have been successfully synthesized via a facile homogeneous precipitation method. Furthermore, we have researched the influence of temperature, dispersant concentration, solution concentration, and aging time to the diameter of ZnS nanoparticle. The as-prepared products were characterized by SEM, laser particle size analyzer, XRD, PL, and EL. Results reveal that the products fabricated with appropriate surfactant concentration and proper solution concentration under the temperature of 0 ℃ with aging time of 24 h were of small mean diameter and high crystallinity. It is found that the dried and annealed samples excited by 275 nm UV lights and 2 kV(1 mm sample) high-voltage showed glaucous and green emissions with the peak at about 495 nm and 520 nm respectively. |
| Keywords: ZnS homogeneous precipitation method monodispersed PL EL |
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| 杨超舜,叶 鹏,周雅伟,赵晓鹏.均匀沉淀法制备单分散纳米ZnS及发光性能[J].无机化学学报,2010,26(9):1561-1566. |
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