Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review
Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review
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DOI：
10.1002/aoc.1517
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发表时间：
2009-09
影响因子：
3.9
通讯作者：
M. Othman;Z. Helwani;Martunus Martunus-Martunus;W. Fernando
中科院分区：
文献类型：
--
作者：
M. Othman;Z. Helwani;Martunus Martunus-Martunus;W. Fernando
本文对共沉淀法、尿素水解法、水热法、溶胶-凝胶法、微波辐照法、蒸汽活化法和溶剂热法等制备水滑石的方法进行了综述。研究表明，二价阳离子的性质、合成方法、煅烧温度和层间物质的性质是形成层状双氧根表面性质的决定因素。在合成过程中，通过改变铝的含量，可以方便地调节混合氧化物表面基位的基本强度和结构变化。在凝胶化和结晶过程中，微波照射与溶胶-凝胶的结合也增加了类水滑石化合物的表面积。John Wiley & Sons, Ltd.版权所有
In this paper, widely accepted methods of hydrotalcite preparation such as co-precipitation, urea hydrolysis, hydrothermal, sol – gel, microwave irradiation, steam activation and solvothermal have been selected and reviewed. Our review indicates that the nature of the divalent cations, the synthesis method, the calcination temperature and the nature of the interlayer species are determinant factors in shaping the surface properties of the layered double hydoxides. The basic strength of the surface base site and structural changes produced in the mixed oxides can be adjusted conveniently by varying the Al content during the synthesis. The combination of sol – gel with microwave irradiation during the gelling and crystallization steps has also been found to increase the surface area of the hydrotalcite-like compound. Copyright c � 2009 John Wiley & Sons, Ltd.