摘要
以硫脲聚合物为碳前体,通过高温热解合成了含N、S原子的碳材料(NSC),进一步采用HF水热法成功制备了N、S、F三掺杂的多孔碳(NSFCs),并考察其在2-甲基萘(2-MN)选择性氧化制备2-甲基-1,4-萘醌(2-MNQ)反应中的催化性能。利用SEM、XPS、XRD、BET等对碳材料进行表征,考察了HF处理水热温度对材料催化性能以及反应工艺条件对2-MNQ收率的影响。结果表明,经氟化改性后的碳催化剂有利于提高产物选择性,且NSFC-150(水热温度为150℃)的催化性能最佳,在反应温度为90℃、m(2-MN)∶m(NSFC-150)=12∶1、反应时间为4 h时,2-MNQ的收率为85.17%。
Using thiourea polymer as carbon precursor,N-and S-containing carbon materials(NSC)are synthesized via high-temperature pyrolysis,and then N/S/F tri-doped porous carbons(NSFCs)are successfully prepared through HF hydrothermal method.The catalytic performance of NSFCs is evaluated in selective oxidation of 2-methylnaphthalene(2-MN)to 2-methyl-1,4-naphthoquinone.NSFCs are characterized by means of SEM,XPS,XRD,BET.The influence of HF treatment hydrothermal temperature on the catalytic performance of NSFCs is studied,and the effect of reaction process conditions on the yield of 2-menaquinone is investigated.Results show that the carbon-based catalysts modified by fluorination are beneficial to improve the product selectivity,and NSFC-150 that is made at a hydrothermal temperature of 150℃has the best catalytic performance,over which the yield of 2-menaquinone reaches 85.17%when reaction temperature is at 90℃,m(2-MN):m(NSFC-150)=12:1 and the reaction lasts for 4 h.
作者
刘茹
徐丽
刘国际
LIU Ru;XU Li;LIU Guo-ji(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《现代化工》
CAS
CSCD
北大核心
2023年第4期161-165,170,共6页
Modern Chemical Industry
基金
河南省骨干教师培养计划(2019GGJS007)。
关键词
碳催化
水热
氟化
液相氧化
2-甲萘醌
维生素K_(3)
carbon catalysis
hydrothermal
fluorination
liquid phase oxidation
2-menaquinone
vitamin K_(3)
