Materials Research Group, Department of Chemistry, St. Joseph's College, 36 Langford Road, Bangalore 560 027, India.
J Colloid Interface Sci. 2011 Oct 15;362(2):493-6. doi: 10.1016/j.jcis.2011.06.078. Epub 2011 Jul 14.
The anionic clay, zinc hydroxy nitrate was found to selectively intercalate fluoride ions from a mixture of halide ions and chloride ions from a mixture of chloride, bromide and iodide ions. In a binary mixture of chloride and bromide ions, the selectivity for chloride ions was very high (94%) even when the bromide concentration was eight times in excess. The selectivity was achieved in both concentrated and dilute salt solutions. The trend in selectivity observed here is different from what has been observed for layered double hydroxides.
阴离子粘土锌羟硝酸盐被发现可以从氯化物、溴化物和碘化物的混合物中的卤化物离子和氯离子混合物中选择性地嵌入氟离子。在氯化物和溴化物的二元混合物中，即使溴化物浓度超过 8 倍，对氯离子的选择性也非常高（94%）。这种选择性在浓盐溶液和稀盐溶液中都能实现。这里观察到的选择性趋势与层状双氢氧化物所观察到的不同。
