煅烧温度对气凝胶催化剂合成SWNTs催化活性的影响

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研究了不同煅烧温度对Fe/Mo/A12O3气凝胶催化剂合成单壁碳纳米管(SWNTs)催化活性的影响.考察了不同煅烧温度下该催化剂自身的物理化学变化以及催化生长的无定型碳含量,SWNTs的含量、直径及石墨化程度.研究结果表明:不同温度的煅烧处理会影响催化剂的表面形态以及A12O3载体的晶化程度,进而影响了SWNTs的生长.600℃煅烧时,气凝胶催化剂具有最高的活性,此时催化生长的无定型碳含量仅占粗产品的1.7%,SWNTs的含量高达54.6%,且合成的SWNTs质量高、管径分布非常均一,为0.86nm左右.
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