Preparation of short carbon nanotubes by mechanical ball milling and their hydrogen adsorption behavior |
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| Authors: | Fu Liu Xiaobin Zhang Jipeng Cheng Fanzhi Kong Changpin Chen |
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| Affiliation: | a Department of Materials Science and Engineering, Zhejiang University, No. 38, Zheda Road, Hangzhou 310027, PR China
b State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, PR China |
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| Abstract: | Short multi-wall carbon nanotubes (MWNTs) with open tips were obtained by mechanical ball milling. The microstructure characteristics of MWNTs before and after ball milling were checked by transmission electron microscopy (TEM). The effect of ball milling on the hydrogen adsorption behavior of the MWNTs was studied. The hydrogen adsorption experiments were carried out at room temperature under a pressure of 8-9 MPa. The hydrogen adsorption capacity of carbon nanotubes milled for 10 h was 0.66 wt%, which was about six times that of MWNTs without milling. For the carbon nanotubes milled with MgO for 1 h, a hydrogen adsorption capacity of 0.69 wt% was obtained. The enhancement of hydrogen adsorption might result from the increase of defects and surface area of the MWNTs caused by ball milling. |
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| Keywords: | A. Carbon nanotubes B. Catalyst Chemical vapor deposition C. Transmission electron microscopy D. Gas storage |
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