Abstract: Layered double hydroxides (LDHs) have attracted increasing interests in rece nt years due to their potential applications. This paper is designed to review t he state of the art in the preparation of LDHs. Particle size control and crysta llinity control of LDHs, preparation of noble metal-containing LDHs, macro-mor p hologically controlled preparation and in situ immobilization of LDHs are di scussed in detail.

Key words: layered anionic material, preparation, catalysis, particle size, morphology, in situ immobilization