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以硝酸铜和均苯三甲酸(BTC)为原料,水热合成了一种金属有机骨架化合物Cu-BTC,在水相中催化苯甲醇选择氧化反应,H2O2氧化剂,优化了Cu-BTC的晶化条件.70℃反应1 h,Cu-BTC(110C/24 h)上的苯甲醇转化率为75.4%、苯甲醛选择性83.5%,但反应后Cu-BTC骨架完全塌陷.在氮气中高温焙烧Cu-BTC,制得衍生物Cu@C,也用于催化苯甲醇氧化反应.结果表明:Cu@C催化剂重复使用5次,可维持较高的苯甲醇转化率,但苯甲醛选择性有所下降.用X射线衍射(XRD)、N2物理吸附(BET)、热分析(TG-DSC)、红外光谱(FTIR)、能量色散X射线光谱分析(EDX)等技术对催化剂进行了结构表征,发现:Cu@C在反应中生成的Cu2O促进了苯甲醛的深度氧化.
Cu-BTC, a metal-organic framework compound, was hydrothermally synthesized from copper nitrate and trimellitic acid (BTC). The selective catalytic oxidation of benzyl alcohol and H2O2 oxidant in the aqueous phase was carried out to optimize the crystallization of Cu-BTC Under the conditions of 70 ℃ for 1 h, the conversion of benzyl alcohol on Cu-BTC (110C / 24 h) was 75.4% and the selectivity to benzaldehyde was 83.5%, but the skeleton of Cu-BTC completely collapsed after the reaction. -BTC, the Cu @ C catalyst was also used to catalyze the oxidation of benzyl alcohol.The results showed that the Cu @ C catalyst could be reused 5 times, the conversion of benzyl alcohol could be maintained, but the selectivity to benzaldehyde decreased The structure of the catalyst was characterized by X - ray diffraction (XRD), N2 physical adsorption (BET), thermal analysis (TG - DSC), infrared spectroscopy (FTIR) and energy dispersive X - ray spectroscopy (EDX) Cu @ Cu generated during the reaction promoted the deep oxidation of benzaldehyde.