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采用沉淀-水热法制备了表面活性剂(十二烷基硫酸根)插层的水滑石负载纳米钯催化剂,通过XRD、ICP-AES、XPS、TG、氢气脉冲吸附等分析手段对催化剂晶型结构、形貌及金属分散度进行了表征,考察了用十二烷基硫酸根插层水滑石后负载钯制备的催化剂在不同碱、溶剂、溶剂与水比例、时间、温度、催化剂用量等条件下对Suzuki偶联反应的影响。实验结果表明,插层后的水滑石结构并没有改变,催化剂催化活性显著提高。反应的最佳条件为:碱为氢氧化钾、溶剂为甲醇、与水比例为1:1、温度为50℃、时间为60min、催化剂用量为1.75×10-3mmol,催化剂在重复使用第三次时,产物收率仍可保持在95%以上。
Hydrotalcite supported nano-palladium catalyst with surfactant (dodecyl sulfate) intercalation was prepared by precipitation-hydrothermal method. The catalytic activity of the catalyst was characterized by XRD, ICP-AES, XPS, TG, Structure, morphology and dispersion of metal were investigated. The effects of different base, solvent, solvent and water ratio, time, temperature, catalyst dosage and other conditions on the catalyst prepared with palladium dodecylsulfate intercalated hydrotalcite Effect on Suzuki Coupling Reaction. The experimental results show that the structure of the intercalated hydrotalcite does not change, and the catalytic activity of the catalyst is significantly increased. The optimum reaction conditions are as follows: the base is potassium hydroxide, the solvent is methanol, the ratio of water to water is 1: 1, the temperature is 50 ℃, the time is 60min, the amount of catalyst is 1.75 × 10-3mmol, the catalyst is reused for the third time , The product yield can still be maintained above 95%.