低温固相法制备高比表面积的纳米MgO

doi:10.3321/j.issn:0253-9837.2006.09.010

CORC > 北京大学 > 化学与分子工程学院

	低温固相法制备高比表面积的纳米MgO; Synthesis of Nanometer Magnesia with High Surface Area by Solid-State Chemical Reaction
	管洪波 ; 王培 ; 赵璧英 ; 朱月香 ; 谢有畅
刊名	催化学报
	2006
关键词	纳米氧化镁草酸乙酸镁固相反应高比表面积 nanometer magnesia oxalic acid magnesium acetate solid-state chemical reaction high surface area
DOI	10.3321/j.issn:0253-9837.2006.09.010
英文摘要	以草酸和乙酸镁为原料,采用低温固相化学反应合成出前体MgC2O4·2H2O,再通过焙烧得到纳米MgO.采用X射线衍射、N2物理吸附、透射电镜和热重-差热技术对前体和MgO样品进行了表征,并考察了焙烧气氛的影响.结果表明,在流动干燥的氮气中520℃焙烧4 h后制得了比表面积高达412 m2/g的纳米MgO;此MgO为面心立方结构,晶粒尺寸为4～5 nm,粒子堆积成在一定程度上长程有序的介孔结构,并具有十分优良的抗高温烧结性能,600和800℃焙烧2 h后,其比表面积仍分别高达357和153 m2/g.; Nanometer MgO samples with high surface area, small crystal size, and mesoporous texture were synthesized by thermal decomposition of MgC2O4 center dot 2H(2)O, which was prepared by solid-state chemical reaction between H2C2O4 center dot 2H(2)O and Mg(CH3COO)(2)center dot 4H(2)O. The existence of steam accelerated the sintering of MgO during the decomposition process and MgO with surface area as high as 412 m(2)/g was obtained through calcining the precursor in flowing dry nitrogen at 520 degrees C for 4 h. The samples were characterized by X-ray diffraction, N-2 adsorption, transmission electron microscopy, thermogravimetry, and differential thermal analysis. The as-prepared MgO was composed of nanocrystals with a size of 4-5 nm and formed a wormhole-like porous structure. In addition, the MgO had good thermal stability, and its surface area was still 357 and 153 m(2) /g after calcination at 600 and 800 degrees C for 2 h, respectively. Compared with the MgO sample prepared by the precipitation method, MgO prepared by the solid-state chemical reaction has similar pore size distribution, surface area, and crystal size. The solid-state chemical method has the advantages of low cost, low pollution, and high yield; therefore it appears to be a promising method for the manufacture of nanometer MgO in industry.; 国家重点基础研究发展计划(973计划); 国家自然科学基金; 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; 9; 793-798; 27
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/251610]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	管洪波,王培,赵璧英,等. 低温固相法制备高比表面积的纳米MgO, Synthesis of Nanometer Magnesia with High Surface Area by Solid-State Chemical Reaction[J]. 催化学报,2006.
APA	管洪波,王培,赵璧英,朱月香,&谢有畅.(2006).低温固相法制备高比表面积的纳米MgO.催化学报.
MLA	管洪波,et al."低温固相法制备高比表面积的纳米MgO".催化学报 (2006).