层状双氢氧化物的稳定性。1. 层状双氢氧化物及其简单对应物的相对稳定性。
Layered double hydroxide stability. 1. Relative stabilities of layered double hydroxides and their simple counterparts.
作者信息
Boclair J W, Braterman P S
机构信息
Department of Chemistry, University of North Texas, Denton 76203-5070, USA.
出版信息
Chem Mater. 1999;11(2):298-302. doi: 10.1021/cm980523u.
Solutions containing di- and trivalent metal chlorides [M(II) = Mg2+, Zn2+, Co2+, Ni2+, Mn2+; M(III) = Al3+, Fe3+] were titrated with NaOH to yield hydrotalcite-like layered double hydroxides (LDH), [[M(II)]1-x[M(III)]x(OH)2][Cl]x yH2O, by way of M(III) hydroxide/hydrous oxide intermediates. Analysis of the resultant titration curves yields nominal solubility constants for the LDH. The corresponding LDH stabilities are in the order Mg < Mn < Co approximately Ni < Zn for M(II) and Al < Fe for M(III). The stability of LDH relative to the separate metal hydroxides/hydrous oxides is discussed.
含有二价和三价金属氯化物[M(II) = Mg2+、Zn2+、Co2+、Ni2+、Mn2+；M(III) = Al3+、Fe3+]的溶液用NaOH滴定，通过M(III)氢氧化物/水合氧化物中间体生成类水滑石层状双氢氧化物(LDH)，即[[M(II)]1-x[M(III)]x(OH)2][Cl]x·yH2O。对所得滴定曲线的分析得出了LDH的名义溶解度常数。对于M(II)，相应的LDH稳定性顺序为Mg < Mn < Co≈Ni < Zn；对于M(III)，稳定性顺序为Al < Fe。讨论了LDH相对于单独的金属氢氧化物/水合氧化物的稳定性。
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