中文摘要：

以ZnSO4、FeSO4为原料，采用共沉淀和氧化的两步法合成了ZnFe^Ⅲ二元类水滑石化合物，详细探讨了原料配比、PH及氧化处理条件等因素对合成产物物相的影响。借助XRD，FTIR，N2吸附等手段对合成物物化性能进行表征。研究结果表明：以Zn（NO3）2、Fe（NO3）3为原料，改变合成条件只能得到碱式碳酸锌或碱式硝酸锌；而以FeSO4、FeSO4为原料，采用共沉淀和氧化的两步法可得到晶相单一、结晶度良好的ZnFe^Ⅲ HTLCS。两步法制备ZnFe^Ⅲ类水滑石的最适宜的条件为：n（Zn^2＋）／n（Fe^2＋）=2.0～3．0，PH=6．0～7．0，氧化温度为25℃，该条件下合成的ZnFe^Ⅲ HTLCS有较高的热稳定性，热分解温度为600℃；有较窄的粒径分布，中值粒径为1．24μm，平均粒径为1．28／zm；吸附等温线类型为Ⅱ型，比表面积为23．08m^2／g。

英文摘要：

ZnFe^Ⅲ-hydrotalcite-like-compounds （ZnFe^Ⅲ HTLcs） were synthesized from ZnSO4 and FeSO4 by two-step method, i.e. co-precipitation and subsequent oxidation by H2 02. The influence of the parameters such as ratio of materials, pH value and the oxidation condition, was discussed. Characteriza- tion of samples was carried out by XRD, FTIR, and N2-adsorption. The results show that basic zinc carbonate or alkaline zinc nitrate was obtained from Zn（NO3 ）2 and Fe（NO3）3 by changing the synthesis conditions. However, a single crystalline phase ZnFe^Ⅲ HTLcs with high erystallinity was obtained from ZnSO4 and FeSO4 by the two-step method. The optimized condition for the preparation of ZnFe^Ⅲ HTLcs by two-step method was, n（Zn^2＋ ）/n（Fe^2＋ ） =2.0-3.0, pH=6.0-7.0, and the oxidation temperature 25 ℃. The prepared ZnFe111 HTLcs showed excellent thermal stability and narrow particle size distribution. The thermal decomposition temperature was 600℃. Median particle size was 1.24 μm and average particle size was 1.28 μm. The adsorption isotherms of the ZnFe^Ⅲ HTLcs belonged to Ⅱ-type and the specific surface area was 23.08 m^2/g.