Han Jishuo, Li Guohua, Yuan Lin
School of High Temperature Materials and Magnesia Resources Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
Ruitai Materials Technology Co., Ltd., China Building Materials Academy, Beijing 100024, China.
Materials (Basel). 2019 Feb 11;12(3):537. doi: 10.3390/ma12030537.
Nanostructured hollow MgO microspheres were prepared by the template method. First, D-Anhydrous glucose was polymerized by the hydrothermal method to form a template. Second, a colorless solution was obtained by mixing magnesite with hydrochloric acid in a 1:2 proportion and heating in an 80 °C water bath for 2 h. Finally, the template from the first step was placed in the colorless solution, and the resulting precipitate was calcined at 550 °C for 2 h. The phase composition and microstructure of the calcined samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD results indicated that the main crystal is periclase. The SEM results indicates that the template carbon microsphere surface is smooth, and the its size is uniform and concentrated in the range of 100⁻200 nm. The diameters of the samples range from 60 to 90 nm, which is smaller than the size of the carbon microsphere. The TEM results indicates that the sample is hollow with a shell thickness of about 6⁻10 nm. The specific surface area of the calcined hollow sphere is 59.5 m²·g.
采用模板法制备了纳米结构的中空氧化镁微球。首先，通过水热法使D-无水葡萄糖聚合形成模板。其次，将菱镁矿与盐酸按1:2的比例混合，并在80℃水浴中加热2小时，得到无色溶液。最后，将第一步得到的模板置于无色溶液中，所得沉淀在550℃下煅烧2小时。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对煅烧样品的相组成和微观结构进行了表征。XRD结果表明主要晶体为方镁石。SEM结果表明模板碳微球表面光滑，其尺寸均匀，集中在100-200nm范围内。样品的直径范围为60至90nm，小于碳微球的尺寸。TEM结果表明样品为中空结构，壳厚度约为6-10nm。煅烧后的中空球体的比表面积为59.5m²·g。
