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采用均匀沉积-沉淀法制备了氧化铜修饰羟基磷灰石负载金催化剂(Au/CuO-HAP),并用原子吸收光谱、N2吸附脱附、X射线粉末衍射、透射电镜和X射线光电子能谱等方法对催化剂结构和形貌进行了表征.考察了催化剂对醇类液相需氧氧化的催化性能.与单金属Au/HAP或CuO-HAP相比较,双金属Au/CuO-HAP对苯甲醇氧化的催化活性和苯甲醛的选择性有显著提高,120℃反应1.5h,苯甲醇的转化率和苯甲醛的选择性分别达到99.7%和98.4%.在Au/CuO-HAP的催化下,其它类型的芳香醇均可高选择性转化为相应的醛或酮.Au/CuO-HAP催化剂有很好的稳定性和可回收性,4次回收后,其催化活性没有明显变化.
Copper oxide modified hydroxyapatite supported gold catalysts (Au / CuO-HAP) were prepared by homogeneous deposition-precipitation method and characterized by atomic absorption spectroscopy, N2 adsorption and desorption, X-ray powder diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy The structure and morphology of the catalyst were characterized. The catalytic performance of the catalyst for the aerobic oxidation of alcohols was investigated. Compared with the single metal Au / HAP or CuO-HAP, the bimetallic Au / CuO-HAP oxidized benzyl alcohol The catalytic activity and the selectivity of benzaldehyde were significantly increased, and the conversion of benzyl alcohol and the selectivity of benzaldehyde reached 99.7% and 98.4% respectively at 120 ℃ for 1.5h. Under the catalysis of Au / CuO-HAP, Of the aromatic alcohols can be highly selectively converted to the corresponding aldehydes or ketones.Au / CuO-HAP catalyst has good stability and recyclability, after 4 recovery, the catalytic activity did not change significantly.