摘要
使用一锅法成功制备了水溶性聚酰胺酸盐稳定的金纳米催化剂(AuNPs-PAAS),将该催化剂用于伯醇的催化氧化.利用紫外-可见分光光度计,X射线衍射仪(XRD),透射电子显微镜(TEM)等表征方法对催化剂进行了表征.结果表明,金纳米粒子在聚酰胺酸溶液中处于均匀分散状态,金纳米尺寸约为5 nm.将制备的纳米金催化剂用于伯醇的氧化,评价了其在伯醇氧化成羧酸反应中的催化性能,结果显示,在空气为氧化剂,水为溶剂的条件下,AuNPs-PAAS对伯醇的催化氧化为高效的准均相催化过程,高选择性得到羧酸产物,通过调节溶液的pH值,可以很容易的实现产物与反应体系分离和催化剂的回收和循环利用.
In this work,water-soluble gold nanoparticles stabilized by poly（amic acid） salt（ AuNPs-PAAS） were synthesized by a one-pot method and were used for the catalytic oxidation of primary alcohols. The catalysts were characterized by using UV-vis absorption,powder X-ray diffraction,transmission electron microscopy,analysis results showed that the gold nanoparticles were highly dispersed in the PAAS solution with a diameter of about 5 nm.The catalytic experiment results indicated that,the Au NPs-PAAS catalyzed oxidation of primary alcohols in water allowed for highly efficient quasi-homogeneous catalytic reactions using air as oxidant,carboxylic acids were obtained with high selectivity,the products were easy to be separated and the catalyst was easy to be recovered by adjust the p H value of the reaction mixture.
作者
罗发国
李俊
李衡峰
LUO Fa-guo LI Jun LI Heng-feng(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
出处
《分子催化》
EI
CAS
CSCD
北大核心
2017年第1期30-37,共8页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金(51573209)~~
关键词
聚酰胺酸盐
金纳米粒子
准均相催化
伯醇
氧化
poly（amic acid） salt
gold nanoparticle
quasi-homogeneous catalysis
primary alcohols
oxidation
