Preparation and dispersity of carbon nanospheres by carbonizing polyacrylonitrile microspheres

Yang Guangzhi; Yu Binbin; Song Shen; Tang Zhihong; Yu Dengguang; Yang Junhe

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Preparation and dispersity of carbon nanospheres by carbonizing polyacrylonitrile microspheres

机译：碳化聚丙烯腈微球制备碳纳米球及其分散性

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Polyacrylonitrile microspheres of about 240 nm were synthesized and used as a precursor for preparing carbon nanospheres (CNs) by oxidation and sequential carbonization. The relationship between preparation conditions and sphere properties (dispersity and yield) were investigated. For oxidation, a slow heating rate resulted in good dispersity and high final temperature led to high yield of carbon. For carbonization, a slow heating rate and a fast flow rate of protection gas were good for the high dispersity of CNs. Under optimized conditions of 0.1 °C min?1 to 300 °C for oxidation and 3 °C min?1 to 1000 °C for carbonization under N₂ protection of 1.8 L min?1, CNs with 180 nm diameter, 4.51% nitrogen content, high purity, and good dispersity were fabricated. Moreover, after being further treated at 2800 °C, graphitized CNs with high crystal structures were obtained.

机译：合成了约240 nm的聚丙烯腈微球，并用作通过氧化和顺序碳化制备碳纳米球（CNs）的前体。研究了制备条件与球形性质（分散性和产率）之间的关系。对于氧化，缓慢的加热速率导致良好的分散性，而较高的最终温度导致较高的碳收率。对于碳化，保护气体的缓慢加热速率和快速流动速率对于CN的高分散性是有利的。在0.1°C min ？1 至300°C氧化和3°C min ？1 的优化条件下在N _{2 保护的1.8 L min ？1 的CNs下，至1000°C碳化制备了直径为4.51％的氮，纯度高，分散性好。而且，在2800℃下进一步处理后，获得具有高晶体结构的石墨化CN。}

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《RSC Advances》 |2017年第27期|共7页
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Yang Guangzhi; Yu Binbin; Song Shen; Tang Zhihong; Yu Dengguang; Yang Junhe;
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中图分类化学;
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Preparation and dispersity of carbon nanospheres by carbonizing polyacrylonitrile microspheres

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