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从“生长基元”角度出发,研究了水滑石晶体生长机理,结果表明水滑石生长形态符合负离子配位多面体生长模型.采用Raman光谱分析了镁铝水滑石、铜镁铝类水滑石、铜锌镁铝类水滑石生长溶液拉曼位移,发现镁铝水滑石层板生长基元是[Mg-(OH)6]4-,[Al-(OH)6]3-;含铜锌类水滑石的生长基元是[M-(OH)6]4-(M=Zn2+,Cu2+),[Mg-(OH)6]4-,[Al-(OH)6]3-,水滑石的生长是生长基元先叠合为金属板层,然后再吸附阴离子An及H2O,依此循环而组成层状化合物.水滑石生长基元所处生长环境不同,会使生长形态不同,以至形成不同外形的水滑石.文章还分析了为什么含铜类水滑石较难合成的原因.
The growth mechanism of hydrotalcite crystals was studied from the perspective of growth primitives and the results show that the growth morphology of hydrotalcite accords with the growth model of anionic coordination polyhedron. The Raman spectra of Mg-Al hydrotalcite, Cu-Mg-Al hydrotalcite, Mg-Al-Mg-Al hydrotalcite growth solution Raman shift found Mg-Al hydrotalcite plate growth element is [Mg- (OH) 6] 4-, [Al- The hydrotalcite-based growth units are [M- (OH) 6] 4- (M = Zn2 +, Cu2 +), [Mg- Growth is the growth of the first element of the metal lamination stack layer, and then re-adsorption of anions An and H2O, in order to cycle layered compounds. Hydrotalcite growth of different growth conditions, will make the growth of different morphologies, as well as the formation of different Shape hydrotalcite.The article also analyzes why the copper-containing hydrotalcite is more difficult to synthesize.