纳米
材料科学
纳米技术
过程(计算)
镁
冶金
计算机科学
复合材料
操作系统
作者
Hongbo Guan,Sheng Wang,Sheng Wang,Biying Zhao,Yuexiang Zhu,Youchang Xie
出处
期刊:Acta physico-chimica Sinica
[Acta Physico-Chimica Sinica & University Chemistry Editorial Office, Peking University]
日期:2006-07-01
卷期号:22 (7): 804-807
被引量:20
标识
DOI:10.1016/s1872-1508(06)60033-8
摘要
Abstract Three kinds of MgC 2 O 4 ·2H 2 O were prepared by the precipitation method with different raw materials, and MgO with high surface area was obtained via thermal decomposition of MgC 2 O 4 ·2H 2 O in different atmospheres. The precursor MgC 2 O 4 ·2H 2 O and as-prepared MgO were characterized by XRD, BET, TEM, and TG-DTA measurements. It was found that using Mg(CH 3 COO) 2 ·4H 2 O and H 2 C 2 O 4 ·2H 2 O as the starting materials and calcining the precursor MgC 2 O 4 ·2H 2 O in flowing dry gas are the key factors to obtain high surface area for MgO. The MgO prepared at the optimum condition is composed of nanocrystals with a size of about 4–5 nm and forms a wormhole-like porous structure with a specific surface area of 534 m 2 ·g −1 after calcining at 520 °C. In addition, the MgO has good thermal stability; after being calcined at 650 °C and 800 °C for 2 h, its surface area is still 229 m 2 ·g −1 and 134 m 2 ·g −1 , respectively.
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