Lee Su-Bin, Ko Eun-Hye, Park Joo Y, Oh Jae-Min
Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Korea.
Discipline of Information Technology, Media and Communication, Murdoch University, Western Australia 6150, Australia.
Nanomaterials (Basel). 2021 Apr 28;11(5):1153. doi: 10.3390/nano11051153.
Mixed metal oxide (MMO) is one of the widely utilized ceramic materials in various industries. In order to obtain high performance, the specific surface area of MMO should be controlled. Calcination of layered double hydroxide (LDH) is a versatile way to prepare MMO with homogeneous metal distribution and well-developed porosity. Although researchers found that the specific surface area of LDH-originated MMO was relatively high, it had not been systematically investigated how the surface area is controlled under a certain parameter. In this review, we summarized LDH-originated MMO with various starting composition, calcination temperature, and pore developing agent in terms of specific surface area and porosity. Briefly, it was represented that MMOs with Mg-Al components generally had higher specific surface area than Mg-Fe or Zn-Al components. Calcination temperature in the range 300-600 °C resulted in the high specific surface area, while upper or lower temperature reduced the values. Pore developing agent did not result in dramatic increase in MMO; however, the pore size distribution became narrower in the presence of pore developing agents.
混合金属氧化物（MMO）是各行业广泛使用的陶瓷材料之一。为了获得高性能，需要控制MMO的比表面积。层状双氢氧化物（LDH）的煅烧是制备金属分布均匀且孔隙发达的MMO的通用方法。尽管研究人员发现源自LDH的MMO比表面积相对较高，但尚未系统研究在特定参数下如何控制其表面积。在本综述中，我们从比表面积和孔隙率方面总结了具有不同起始组成、煅烧温度和造孔剂的源自LDH的MMO。简而言之，含Mg-Al组分的MMO通常比含Mg-Fe或Zn-Al组分的具有更高的比表面积。300-600°C范围内的煅烧温度导致比表面积较高，而温度过高或过低都会降低该值。造孔剂不会使MMO的比表面积显著增加；然而，在有造孔剂的情况下，孔径分布会变窄。
