高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

利用Ostwald熟化作用合成空心碳纳米材料

陈锴1,2;马丁1;黄伟新2;包信和1   

    1. 中国科学院大连化学物理研究所催化基础国家重点实验室, 大连 116023;
    2. 中国科学技术大学化学物理系, 合肥微尺度物质科学国家实验室, 合肥 230026
  • 收稿日期:2008-04-10 修回日期:1900-01-01 出版日期:2008-08-10 发布日期:2008-08-10
  • 通讯作者: 马丁

Hydrothermal Syntheses of Hollow Carbon Nano-materials by Ostwald Ripening

CHEN Kai1,2;MA Ding1*;HUANG Wei-Xin2;BAO Xin-He1   

    1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2008-04-10 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10
  • Contact: MA Ding

PDF (PC)

被引次数

37

摘要： 以淀粉等易获得的生物质为碳前驱物, 亚铁盐为添加剂, 采用水热法制备了碳材料. 实验发现, 在反应过程中, 首先生成了被无定形碳包裹的铁氧化物纳米棒, 形成碳/铁氧化物的核/壳结构. 在进一步的反应中, 铁氧化物核自发溶解, 最终得到了空心的碳纳米棒. 讨论了铁氧化物自发溶解的原因, 认为空心碳纳米棒的形成是由Ostwald熟化现象造成的. 当以葡萄糖或环糊精为碳前驱物时, 得到的是空心碳球, 这可能与各种碳前驱物不同的表面活性剂作用有关.

关键词: 水热合成, Ostwald熟化, 中空结构, 碳材料, 淀粉

Abstract: A facile method to fabricate carbon nano-materials, with starch as a carbon precursor and ferrous salt as an additive, was reported. TEM studies indicated that the FeOOH nanorods were first generated as templates, on which carbon deposited, leading to the formation of FeOOH/carbon core-shell composite nanowires. With longer reaction time, the FeOOH cores can be dissolved spontaneously, leaving hollow carbon nanorods. The mechanism of this dissolution was attributed to Ostwald ripening. When glucose or CD was used as the precursor, hollow carbon spheres would be obtained, which could be attributed to the different surfactant effects of those precursors. This provides a very efficient method to prepare hollow carbon nanostructures via the one-pot synthesis approach. The new synthetic method has a potential to be extended to the preparation of various hollow nanostructures.

Key words: Hydrothermal synthesis, Ostwald ripening, Hollow structure, Carbon material, Starch

中图分类号: 

TrendMD: