温和条件下纳米CuO催化氧化碱木质素合成酚类衍生物研究  

Sduty on the Oxidation of Lignin by Molecular Oxygen into Phenolic Derivatives Catalyzed by Nano CuO under Mild Condition

作　　者：戴宝华[1] 张超[1] 向超[1] 邹帅[1] 张荣[1] 刘亚纯[1] 伏再辉[1] 

机构地区：[1]湖南师范大学化学化工学院,石化新材料与资源精细利用国家地方联合工程实验室,资源精细化与先进材料湖南高校重点实验室,化学生物学和中药分析教育部重点实验室,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2014年第3期36-41,共6页Journal of Natural Science of Hunan Normal University

基　　金：教育部高等学校博士学位点专项科研基金资助项目(20124306110005);湖南省自然科学基金资助项目(14JJ2148)

摘　　要：以硝酸铜或醋酸铜为原料,分别采用沉淀法和溶剂热法制备了两种纳米氧化铜(CuO-1和CuO-2).用XRD和SEM对催化剂进行了表征,在温和反应条件下(95℃,1 atm),研究了CuO催化分子氧氧化碱木质素的反应.结果表明,CuO是这一反应的有效催化剂,其中粒子尺寸较小、含有Cu2O杂晶的CuO-1显示最高的活性,在优化反应条件下,木质素的降解率为66.6%,酚类氧化产物丁香酸、香兰素、丁香醛和乙酰丁香酮的总收率可达14.7%,且催化剂的重复使用性能优良.With copper nitrate and copper acetate as raw materials,two kinds of nanometer copper oxide powder（marked as CuO-1 and CuO-2） were prepared via precipitation method and solvothermal method,respectively.The crystal structure and morphology of the above catalysts were characterized using the X-ray powder diffraction（XRD） and scanning electron microscope（SEM）.The CuO-catalyzed oxidation of lignin by O2to phenolic derivatives in alkaline solution was evaluated under mild conditions（95 ℃,1 atm）.The results show that the CuO was active to this reaction and the CuO-1,with a smaller particle size and a small amount of Cu2O,possessed the highest activity.Under the optimized reaction conditions,CuO-1 can achieve 66.6% degradation rate of lignin,providing 14.7% yield for the main phenolic products syringic acid,vanillic aldehyde,syringaldehyde and acetosyringone with a good reusability.

关 键 词：木质素 催化氧化 纳米CUO 酚类产物 降解率 

分 类 号：O643[理学—物理化学]