摘要
金属-有机框架纳米片(Metal-organic framework nanosheets, MONs)是近年来受到广泛关注的一类二维多孔材料,具有超薄厚度、比表面积大、结构可调节及大量可接触的不饱和配位点等优点,被应用于分离、导电、传感、催化等诸多领域中.综述了近年来国内外在MONs的制备、表征及其异相催化相关研究进展.MONs的制备包括"自上而下"和"自下而上"两种策略,自上而下策略操作简单,主要是通过物理化学手段将块状MOFs剥离成MONs;自下而上策略适用范围广,可通过控制实验条件合成MONs.另外,从结构组成、微观形貌、宏观性质等方面对MONs的表征方法和技术进行了讨论.介绍了MONs异相催化主要在有机转化中的应用,包括催化氧化反应、Knoevenagel反应、CO_(2)环加成反应及氢化反应等.最后指出了MONs研究所面临的机遇和挑战.
Two-dimensional metal-organic framework nanosheets(MONs)are a type of 2 D porous materials that have received extensive attention in recent years. With ultra-thin thickness, abundant accessible unsaturated coordination sites,large specific surface area,advantages of adjustable structure,etc.,MONs are widely applied in many fields such as separation,conduction,sensing,and catalysis. This article mainly reviews the preparation,characterization and application in heterogeneous catalysis of MONs in recent years.The preparation of MONs includes two strategies,namely top-down and bottom-up. The top-down strategy is simple to operate,mainly involves exfoliation of layered bulk MOFs through physical or chemical means to into MONs. The bottom-up strategy involves direct assembly of 2 D MONs from metal ions and organic linkers under controlled experimental conditions. The characterization methods and techniques of MONs are discussed from the aspects of structure composition,microscopic morphology,and macroscopic properties.In addition,the application of MONs in heterogeneous catalysis,mainly organic conversion,is introduced,including catalytic oxidation reaction, Knoevenagel reaction, CO_(2) cycloaddition reaction, hydrogenation reaction,etc. Finally,the opportunities and challenges in the field of MONs are pointed out.
作者
陈莲芬
陈燕珊
康健
CHEN Lianfen;CHEN Yanshan;KANG Jian(School of Environmental and Chemical Engineering,Zhaoqing University,Zhaoqing 526061,China)
出处
《材料研究与应用》
CAS
2022年第1期108-117,共10页
Materials Research and Application
基金
国家自然科学基金青年科学基金(22002139)
广东省普通高校特色创新人才项目(2019KQNCX174)
广东省基础与应用基础研究基金联合基金(2019A1515110550)
肇庆市科技计划项目(202004030113)
肇庆学院校级科研基金(202007)
肇庆学院优秀青年教师科研能力提升计划项目
大学生创新创业训练计划项目(202110580013)。
关键词
二维材料
金属-有机框架
制备
表征
异相催化
two-dimensional materials
metal-organic framework nanosheets
preparation
characterization
heterogeneous catalysis
