氧化铜修饰羟基磷灰石负载金对醇类需氧氧化的双金属协同催化
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...
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| Published in | 催化学报 Vol. 36; no. 8; pp. 1358 - 1364 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
武汉大学化学与分子科学学院,湖北武汉,430072
2015
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| Subjects | |
| Online Access | Get full text |
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| Summary: | 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. |
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| Bibliography: | Heterogeneous catalysis Gold-copper bimetallic catalyst Aerobic oxidation of alcohols Hydroxyapatite Reusability A catalyst consisting of Au supported on copper oxide-modified hydroxyapatite （Au/CuO-HAP） was prepared using a homogeneous deposition-precipitation method. The catalyst was characterized using atomic absorption spectrometry, N2 adsorption-desorption, powder X-ray diffraction, trans-mission electron microscopy, and X-ray photoelectron spectroscopy. The catalytic performance in liquid-phase aerobic oxidation of alcohols was investigated. The catalytic activity and benzaldehyde selectivity in benzyl alcohol oxidation with the bimetallic Au/CuO-HAP catalyst were significantly better than those with monometallic Au/HAP and CuO-HAP catalysts. The conversion of benzyl alcohol and selectivity for benzaldehyde at 120 ℃ for 1.5 h under aerobic oxidation conditions were 99.7%and 98.4%, respectively. Various aromatic alcohols were selectively converted to their cor-responding aldehydes or ketones over Au/CuO-H |
| ISSN: | 0253-9837 1872-2067 |
| DOI: | 10.1016/S1872-2067(15)60854-3 |