Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide
Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide
复制标题
氧化镁的煅烧温度依赖性表面结构和理化性质
DOI：
10.1039/c5ra17031a
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发表时间：
2015-10
期刊：
影响因子：
3.9
通讯作者：
Zhiping Zhang
中科院分区：
文献类型：
--
作者：
Xiaoqin Feng;Xiaoxiao Han;Zongquan Bai;Zhiping Zhang
氧化镁（MgO）作为一种非常重要的无机材料，因其独特的表面性质而受到广泛的研究，但其表面结构与物理化学性能之间的相关性尚不清楚。本文采用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、能谱仪（EDS）、热重分析（TGA）和X射线衍射（XRD）等技术研究了MgO颗粒的表面结构和物理化学性质随煅烧温度的变化。结果表明，在400 °C ~ 1000 °C范围内，随着煅烧温度的升高，MgO表面由光滑的形貌沿着转变为纳米颗粒组成的结构，相应的晶体结构也由介晶→多晶→假晶→立方单晶。这也说明MgO的电化学能力高度依赖于其晶体结构，而其催化活性与其织构性质（例如，表面积和孔隙率），尽管反应选择性与煅烧温度有关。这项工作强调了煅烧温度在确定无机材料MgO的表面结构和物理化学性质方面的重要作用，这反过来又将在最终应用中调整其整体性能。
Magnesium oxide (MgO), as an exceptionally important inorganic material, has been widely studied in view of its unique surface properties, but the correlation between its surface structure and physicochemical performance is still scarce. Here we report the evolution of the surface structure and physicochemical properties of trapezoid-like MgO microparticles with calcination temperature by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), thermal gravimetric analysis (TGA) and X-ray diffraction (XRD) techniques. The results demonstrated that along with the surface change of MgO from a smooth appearance to the structure composed of nanoparticles, its corresponding crystal structure evolved from mesocrystal to polycrystal, then to pseudomorph, and finally to cubic single crystal with the increase of calcination temperature ranging from 400 °C to 1000 °C. It also illustrated that the electrochemical capability of MgO was highly dependent on its crystal structure, whereas its catalytic activity had a good correlation with its textural properties (e.g., surface area and porosity) although the reaction selectivity was related to the calcination temperature. This work highlights the vital role of calcination temperature in determining the surface structure and physicochemical properties of the inorganic material MgO, which in turn will tailor its overall performance in the final applications.
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影响因子：
1.2
作者：
C. M. Pathak;V. K. Moorthy
通讯作者：
C. M. Pathak;V. K. Moorthy
煅烧温度对钛酸盐纳米管薄膜形貌、结构及光催化活性的影响
影响因子：
2.1
作者：
Xiao, Ning;Li, Zhonghua;Liu, Jiawen;Gao, Yuan
通讯作者：
Gao, Yuan
影响因子：
1.4
作者：
P. J. Anderson;D. T. Livey
通讯作者：
P. J. Anderson;D. T. Livey
影响因子：
8.6
作者：
J. Stark;K. Klabunde
通讯作者：
J. Stark;K. Klabunde
DOI：
10.1111/j.1151-2916.1951.tb11644.x
发表时间：
1951-01-01
影响因子：
3.9
作者：
EUBANK, WR
通讯作者：
EUBANK, WR