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	W-Fe-MgO催化分解CH_4制备单壁碳纳米管; Single-wall carbon nanotubes produced by decomposition of CH4 on W-Fe-MgO catalysts
	刘霁欣 ; 谢有畅
	2003
关键词	单壁碳纳米管(SWCNTs) 流化床 CH_4分解 W-Fe-MgO single-wall carbon nanotubes (SWCNTs) W-Fe-MgO fluidized bed CH4 decomposition
英文摘要	使用“柠檬酸法”制备了一系列较高比表面的W-Fe-MgO催化剂,在较易放大的流化床反应器中,1100℃H_2气流中分解CH_4,制得SWCNTs管束,单管直径在1～3nm,最高碳产率36mg/100mg催化剂。经TEM、微区Raman、程序升温氧化(TPO)测量表明,产物中无定形碳、MWCNTs均较少,为纯度较高、缺陷较少的SWCNTs。从EDAX结果并参考W-Fe相图推测SWCNTs生长的催化剂活性相可能为W、Fe的金属间化合物或富Fe的固溶体。; A series of W-Fe-MgO catalysts with high BET surface area were prepared by mixing Mg(NO3)(2) . 6H(2)O, ammonium tungstate, citric acid, Fe(NO3)(3) . 9H(2)O and H2O, followed by drying at 150 degreesC and decomposing at 550 degreesC. Using these catalysts, bundled SWCNTs with diameter 1 similar to 3 nm for each tube, were synthesized in a fluidized reactor. The maximum yield of SWCNTs was 36 mg/100 mg. TEM, micro-Raman and TPO (temperature programmed oxidation) results showed that the products were SWCNTs of high purity and almost defect-free. From the EDAX results and phase-diagram of W-Fe, we deduced that the active phase for SWCNTs growth was a solid solution or an intermetal compound of tungsten and iron.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000186698200023&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 2; 11; 1093-1096; 19
语种	中文
出处	SCI ; 万方 ; 知网
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/78563]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	刘霁欣,谢有畅. W-Fe-MgO催化分解CH_4制备单壁碳纳米管, Single-wall carbon nanotubes produced by decomposition of CH4 on W-Fe-MgO catalysts. 2003-01-01.

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