Effects of Citric Acid Concentration and Activation Temperature on the Synthesis of Carbon Nanotubes

摘要/Abstract

摘要： A series of Ni-La-Mg catalyst samples were prepared by citric acid complex method, and carbon nanotubes were synthesized by catalytic decomposition of CH4 on these catalysts. The effects of the citric acid concentration and the activation temperature on catalytic activity were investigated by CO adsorption, TEM and XRD techniques. The experimental results showed that the particle size of the catalysts prepared through gel auto-combustion varied with the concentration of citric acid. Therefore carbon nanotubes with different diameters were obtained correspondingly. The effect of activation temperature on the activity of catalyst was negligible from 500 to 700℃, but it became pronounced at lower or higher temperatures.

关键词: carbon nanotubes, preparation, citric acid complex, activation temperature, CH4

Abstract: A series of Ni-La-Mg catalyst samples were prepared by citric acid complex method, and carbon nanotubes were synthesized by catalytic decomposition of CH4 on these catalysts. The effects of the citric acid concentration and the activation temperature on catalytic activity were investigated by CO adsorption, TEM and XRD techniques. The experimental results showed that the particle size of the catalysts prepared through gel auto-combustion varied with the concentration of citric acid. Therefore carbon nanotubes with different diameters were obtained correspondingly. The effect of activation temperature on the activity of catalyst was negligible from 500 to 700℃, but it became pronounced at lower or higher temperatures.

Key words: carbon nanotubes, preparation, citric acid complex, activation temperature, CH4

Fengyi Li;Minwei Wang;Rongbin Zhang;Renzhong Wei;Niancai Peng. Effects of Citric Acid Concentration and Activation Temperature on the Synthesis of Carbon Nanotubes[J]. 能源化学(英文), 2004, 13 (2): 101-106.

Fengyi Li;Minwei Wang;Rongbin Zhang;Renzhong Wei;Niancai Peng. Effects of Citric Acid Concentration and Activation Temperature on the Synthesis of Carbon Nanotubes[J]. Journal of Energy Chemistry, 2004, 13 (2): 101-106.

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