Decoration carbon nanotubes with Pd and Ru nanocrystals via an inorganic reaction route in supercritical carbon dioxide-methanol solution.
Decoration carbon nanotubes with Pd and Ru nanocrystals via an inorganic reaction route in supercritical carbon dioxide-methanol solution.
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DOI：
10.1016/j.jcis.2006.09.029
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发表时间：
2006-12
影响因子：
9.9
通讯作者：
Zhenyu Sun;Zhimin Liu;B. Han;S. Miao;Zhenjiang Miao;G. An
中科院分区：
文献类型：
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作者：
Zhenyu Sun;Zhimin Liu;B. Han;S. Miao;Zhenjiang Miao;G. An
本工作描述了一种在超临界CO2-甲醇溶液中通过无机反应将金属Pd和Ru纳米晶修饰碳纳米管(CNTs)的方法。在该方法中，PdCl2或RuCl3⋅3H2O溶解在超临界二氧化碳-甲醇溶液中作为金属前驱体，碳纳米管作为模板指导所生成的纳米颗粒的沉积。甲醇既是前驱体的还原剂，又是助溶剂，促进前驱体在超临界CO2中的溶解。反应后用超临界CO2进行原位萃取，即可得到干态产物。用X射线衍射仪、X射线光电子能谱和透射电子显微镜对产物进行了表征。结果表明，通过改变前驱体与碳纳米管的重量比，可以调节沉积在碳纳米管上的纳米粒子的负载量和粒径。这种简单有效的方法也可用于在超临界CO2溶液中利用无机盐前驱体合成其他高纯度材料。
This work describes a method to decorate carbon nanotubes (CNTs) with metallic Pd and Ru nanocrystals via inorganic reactions in supercritical (SC) CO2–methanol solutions. In this route, PdCl2or RuCl3⋅3H2O dissolved in SC CO2–methanol solution acted as a metal precursor and CNTs functioned as a template to direct the deposition of produced nanoparticles. Methanol served as the reductant for the precursors as well as cosolvent to enhance the dissolution of precursors in SC CO2. Dry products were readily obtained through in situ extraction with SC CO2after reactions. The products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. It was demonstrated that the loading content and particle size of the nanoparticles deposited on CNTs could be tuned by changing the weight ratio of the precursor to CNTs. This simple and efficient approach may also be utilized to synthesize other high-purity materials using inorganic salt precursors in SC CO2-based solution.