| 一步微波法制备石墨烯-硫化镉纳米复合材料 |
| One-Step Microwaving Method to Synthesize Graphene-CdS Nanocomposite |
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| 摘要: 石墨烯-硫化镉量子点纳米复合材料在光电领域具有广阔的应用前景,而其性能依赖于良好的硫化镉纳米颗粒均匀地分布在单片石墨烯片上。为此,我们发展了一种简便的一步制备高质量石墨烯-硫化镉纳米复合材料的方法。该方法以氧化石墨烯为原料,二水乙酸镉作为镉源,硫代乙酰胺作为硫源,通过微波加热处理数分钟直接制得石墨烯-硫化镉纳米复合材料。电镜照片显示获得的石墨烯-硫化镉纳米复合材料中硫化镉纳米粒子均匀生长在石墨烯表面,无明显聚集产生。以氧化石墨烯为起始原料一步合成保证了最终纳米复合材料中石墨烯主要以单片形式存在,而在微波加热合成过程中,氧化石墨烯也同时还原成石墨烯。 |
| 关键词: 石墨烯 硫化镉 纳米复合材料 微波反应 |
| 基金项目: 国家自然科学基金(No.21073117和No.21071094)资助项目。 |
| Abstract: Graphene-CdS nanocomposite is a very promising optoelectronic material, and its optoelectronic properties are critically dependent on the distribution of CdS nanoparticles (NPs) on single sheets of graphene. Herein, we developed a facile one-step one-pot microwaving method to produce graphene-CdS nanocomposite, only involving of a few minutes' microwaving of the mixture of graphene oxide (GO), dihydrate acid cadmium and thioacetamide in 90% ethylene glycol solvent. The whole process is simple, efficient and environmental friendly. This method is an improvement of our previous dimethyl sulfoxide method (Adv. Mater., 2010,22:103-106). Using stoichiometric thioacetamide as the sulfur source, the current method avoided the byproduct of hazard hydrogen sulfide gas of the previous method. While using GO as the initial material, which was simultaneously reduced during the microwaving process as CdS NPs grew on graphene sheet, guaranteed that graphene was mainly single-layer sheets in the final nanocomposite. TEM and XRD results show that well-crystallized CdS NPs of a blende structure with an average diameter of about 5.7 nm nicely distributed on single graphene sheets with almost no aggregation. |
| Keywords: graphene CdS nanocomposite microwave reaction |
| 投稿时间：2013-02-27 修订日期：2013-06-19 |
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| 张新,陈琳,王海芳,曹傲能.一步微波法制备石墨烯-硫化镉纳米复合材料[J].无机化学学报,2013,29(8):1675-1679. |
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