摘要
通过水热法及沉淀法,合成了纳微尺度铜金属有机框架催化剂。通过FT-IR、TG及TEM等技术手段对其性能和结构进行了表征。系统考察了催化剂、溶剂种类及用量、反应时间等因素对异丁香酚氧化制备香草醛的影响。结果表明,用均苯三甲酸根(BTC)作配体时制备的催化剂Cu-BTC性能较佳。以Cu-BTC为催化剂、30%(质量分数)H2O2为氧化剂、乙腈为介质,当n(异丁香酚)∶n(H2O2)=1∶2.4时,50℃,反应8 h,异丁香酚转化率为94.4%,香草醛产率达到81.8%。纳微尺度(粒径30-300 nm)Cu-BTC催化剂体现了良好的重复使用性能,连续反应5次,异丁香酚转化率保持在90%左右。
Nano/microscale copper metal-organic framework (MOF) catalysts were synthesized via hydrothermal method or precipitation and characterized by FT-IR, TG and TEM, respectively. The effects of these catalysts, solvent, and reaction time on the oxidation of isoeugenol to vanillin were investigated. Cu-BTC containing BTC (1,3,5-benzenetricarboxylate) ligand is found to exhibit the best catalytic performance. When employing Cu-BTC as catalyst, 30% (mass fraction)H2O2 as oxidant, 94. 4% conversion of isoeugenol and 81.8% yield of vanillin are achieved with n (isoeugenol) : n ( H2O2 ) = 1 : 2.4 after 8 h reaction at 50 ℃ in acetonitrile. Additionally, nano/microscale Cu-BTC( diameter ca. 30 - 300 nm) exhibits good reusability and - 90% conversion of isoeugenol can be maintained in 5 recycles.
出处
《应用化学》
CAS
CSCD
北大核心
2016年第10期1168-1174,共7页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(21475042)
湖南省教育厅科学研究基金项目(12B077
12CY004)资助~~
关键词
铜金属有机框架
纳微尺度
香草醛
过氧化氢
异丁香酚
copper metal-organic framework
nano/microscale
vanillin
hydrogen peroxide
isoeugenol