负载型铜酞菁的制备及其催化氧化巯基乙醇

以3-(环己氧基)-邻苯二腈和氯化铜为原料,通过钼酸铵固相法合成了一种烷氧基取代的铜酞菁配合物α-四(环己氧基)铜酞菁(CuPc),采用浸渍法将其负载在MCM-41和SBA-15介孔分子筛中,制备了CuPc/MCM-41和CuPc/SBA-15催化剂,并且负载后的酞菁还能回收利用,仍然具有催化效果。采用紫外-可见吸收光谱(UV-vis)、红外光谱(IR)对目标产物进行表征,并用TG对酞菁进行热稳定性分析,结果表明酞菁在200℃时开始失重,350℃时失重率最大为58%;通过氮气吸附对催化剂进行表征,证明酞菁已经进入到分子筛孔道,孔容积分别从0.132 cm3/g减至0.055 cm3/g和0.420 cm3/g减至0.202 cm3/g。研究了2种催化剂在不同pH、催化剂浓度下对巯基乙醇(ME)催化氧化性能的影响,结果表明,CuPc/SBA-15对巯基乙醇(ME)具有较高的催化活性,且2种催化剂的活性在pH=12时都达到最大。

Preparation and Catalytic Oxidation of Mercaptoethanol by Supported Copper Phthalocyanine

α-tetra-(cyclohexyloxy) phthalocyanine copper(CuPc) was synthesized by ammonium molybdate solid phase method with 3-(cyclohexyloxy) phthalic nitrile and copper chloride as raw materials.CuPc was loaded on mesopore molecular sieve MCM-41 and SBA-15and then the catalyst CuPc/MCM-41 and CuPc/SBA-15 was prepared by impregnation,the supported phthalocyanine has catalytic activity after recycling.UV-Vis diffuse reflectance spectrometry and IR spectroscopy were used to characterize the target product,and the phthalocyanine was analyzed by TG.Results showed that the phthalocyanine began to decompose at 200 ℃,with the biggest weight loss rate of 58% at 350 ℃.The catalyst was characterized by N2 adsorption,the results showed that the phthalocyanine went into molecular sieve channel,with pore volume decreased from 0.132 cm3/g to 0.055 cm3/g and from 0.055 cm3/g to 0.202 cm3/g respectively.Effect of two catalysts on ME catalytic oxidation were studied at different pH and catalyst concentrations,the results showed that CuPc/SBA-15 has high catalytic activity on ME,and the two catalysts activity are highest at pH 12.