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用Ｎ２吸附法测定了氢氧化铝镁（简称ＡＭＨ）的比表面和孔结构，考察了活化温度的影响．发现活化温度上升时，比表面、孔面积和孔体积都随之增加．１５０℃活化时其比表面为６０．８２ｍ２／ｇ，孔体积为０．２１ｃｍ３／ｇ．ＡＭＨ溶胶粒子干燥时聚集形成了１１～１３ｎｍ的大孔，当活化温度大于２５０℃时由于脱去结构水，粒子内部产生３ｎｍ左右的细孔．同时，还研究了亚甲基蓝（ＭＢ）染料在ＡＭＨ粒子上的吸附，考察了ｐＨ的影响．发现ＭＢ的吸附量与体系的ｐＨ值成正比，ｐＨ＜１０时ＭＢ不能被吸附．单分子吸附面积为３．４ｎｍ２．
The specific surface area and pore structure of magnesium aluminum hydroxide (AMH) were measured by N2 adsorption method. The influence of activation temperature was investigated. It was found that when the activation temperature is increased, the specific surface, pore area and pore volume increase. When activated at 150 ℃, the specific surface area was 60.82m2 / g and pore volume was 0.21cm3 / g. When AMH sol particles are aggregated to form large pores of 11 ~ 13nm, when the activation temperature is higher than 250 ℃, due to the removal of structural water, 3nm pores are generated inside the particles. At the same time, the adsorption of methylene blue (MB) dye on AMH particles was also investigated, and the influence of pH was investigated. MB adsorption was found to be proportional to the pH of the system, and MB could not be adsorbed at pH <10. Single molecule adsorption area of 3.4nm2.