| 第 47 卷第 4 期 |  | Vol. 47 No. 4 | | 2017 年 8 月 | Aug 2017 |
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所属栏目：功能材料
纳米碲化镉／石墨烯水溶液的制备及荧光性能研究 |
| 王素敏，樊亚茹，王奇观，杨 磊，尚嘉茵，罗 丹
（西安工业大学 材料与化工学院，陕西 西安 710032） |
| 摘 要：以石墨为原料，通过热还原法制备了还原性氧化石墨烯（rGO），然后采用水热法将CdTe量子点与rGO以非共价键的方式复合在一起，制备出了纳米CdTe／rGO水溶液。通过X射线衍射仪、紫外-可见分光光度计、透射电子显微镜和荧光分光光度计对样品进行了表征。结果表明，160℃下水热30 min制备的CdTe／rGO荧光性能最好。CdTe量子点均匀地负载在rGO表面；CdTe量子点的团聚体尺寸由复合前的220 nm减小到60~120 nm；并在527 nm处产生荧光猝灭，说明rGO与CdTe量子点之间存在着光诱导电子转移，从而为制备性能可靠的光伏器件提供可能。 |
| 关键词：碲化镉量子点；石墨烯；水溶液；荧光猝灭 |
| 中图分类号：O611.6 文献标识码：A 文章编号：1009-9212（2017）04-0042-04 |
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| Preparation and Fluorescence Performances of Nano CdTe/Graphene Aqueous Solution |
| WANG Su-min, FAN Ya-ru, WANG Qi-guan, YANG Lei, SHANG Jia-yin, LUO Dan
(School of Material Science and Chemical Engineering, Xi'an Technological University, Xi'an 710032, China) |
| Abstract：The reduced graphene oxide(rGO)was prepared by the thermally reduced method from graphite. Then, the nano CdTe/rGO linked by noncovalent bonds was prepared by hydrothermal method. The composites were characterized by XRD, UV-vis, TEM and fluorescence spectra. The obtained results showed that the fluorescence performances were best for CdTe/rGO prepared at 160℃ for 30 min. The CdTe quantum dots were homogeneously distributed on the surface of rGO. After composited with rGO, the clustering size of CdTe quantum dots was decreased from 220 nm to 60~120 nm. In addition, the fluorescence strength of CdTe quantum dots at 527 nm was greatly annihilated after incorporation with rGO, which showed the presence of strong photoinduced electtron transfer between CdTe and rGO. Thus, the obtained CdTe/rGO composites may pave a road to gain reliable performance of photovoltaic devices. |
| Key words：CdTe quantum dots; graphene; water solution; fluorescence annihilation |
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基金项目：陕西省自然科学基金（2015JM5224）。
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作者简介：王素敏（1980-），女，河南平顶山人，副教授，博士，主要从事功能纳米材料研究。
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收稿日期：2017-07-31
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