催化学报 ›› 2012, Vol. 33 ›› Issue (9): 1594-1600.DOI: 10.3724/SP.J.1088.2012.20442

• 研究论文 • 上一篇    下一篇

羊毛-Pd(0) 催化剂的制备、表征及其在水相中对醇的催化氧化反应

马恒昌a, 王锋, 曹伟, 包志康, 马源, 杨志旺, 雷自强b   

  1. 西北师范大学化学化工学院, 甘肃省高分子化学与物理重点研究室, 教育部生态环境相关高分子重点实验室, 甘肃兰州 730070
  • 收稿日期:2012-04-20 修回日期:2012-06-21 出版日期:2012-09-11 发布日期:2012-09-11

Preparation and Characterization of Wool-Pd(0) Catalyst and Its Catalytic Performance for Oxidation of Alcohol in Water

MA Hengchanga, WANG Feng, CAO Wei, BAO Zhikang, MA Yuan, YANG Zhiwang, LEI Ziqiangb   

  1. 以天然生物高分子羊毛为载体, 成功制备了负载型 Pd(0) 催化剂. 采用电场发射扫描电镜和光电子能谱等方法对催化剂进行了表征. 结果表明, Pd(0) 颗粒均匀地分散在羊毛表面. 将羊毛-Pd(0) 催化剂用于醇氧化反应, 考察了催化剂用量、碱类型和用量、反应温度及时间等因素对反应性能的影响. 实验发现, 在水相中, 35 mg 羊毛-Pd(0) 催化剂在 0.2 mmol 的 K2CO3 存在下, 可以高选择性地将 0.2 mmol 的醇转化为相应的醛或酮, 且该催化剂具有很好的重复使用性能.
  • Received:2012-04-20 Revised:2012-06-21 Online:2012-09-11 Published:2012-09-11

摘要: 以天然生物高分子羊毛为载体, 成功制备了负载型 Pd(0) 催化剂. 采用电场发射扫描电镜和光电子能谱等方法对催化剂进行了表征. 结果表明, Pd(0) 颗粒均匀地分散在羊毛表面. 将羊毛-Pd(0) 催化剂用于醇氧化反应, 考察了催化剂用量、碱类型和用量、反应温度及时间等因素对反应性能的影响. 实验发现, 在水相中, 35 mg 羊毛-Pd(0) 催化剂在 0.2 mmol 的 K2CO3 存在下, 可以高选择性地将 0.2 mmol 的醇转化为相应的醛或酮, 且该催化剂具有很好的重复使用性能.

关键词: 天然生物高分子, 羊毛钯-负载型催化剂, 醇, 催化氧化, 醛,

Abstract: Wool-Pd(0) catalyst was prepared successfully using nature biopolymer wool as stabilizer and supporter. The structure of the palladium catalyst was characterized by field emission scanning electron microscopy and X-ray photoelectron spectroscopy, and the results showed that Pd(0) particles are well dispersed on the surface of wool. Applying wool-Pd(0) catalyst in the oxidation of alcohol under optimized conditions, several parameters such as catalyst amount, base, reaction temperature, and reaction time were screened. It was found that 35 mg wool-Pd(0) catalyst is available for the oxidation of 0.2 mmol alcohol to corresponding aldehyde or ketone with higher conversion and selectivity in the presence of 0.2 mmol K2CO3 and using water as reaction medium. The heterogeneous catalyst is of good reusability in this reaction system.

Key words: nature biopolymer, wool-Pd(0) catalyst, alcohol, catalytic oxidation, aldehyde, ketone