合成氧化镁纳米片及其催化合成查尔酮性能

摘要

以氯化镁 (MgCl2) 和尿素 (CO (NH2) 2) 为原料, 采用水热法制备了氧化镁 (MgO) 纳米片前驱体, 并通过后续焙烧处理得到MgO多孔纳米片.采用扫描电子显微镜 (SEM) 、透射电子显微镜 (TEM) 、广角X-射线粉末衍射 (XRD) 、红外光谱 (FT-IR) 、热重 (TG) 以及氮气吸附-脱附 (N2 adsorption-desorption) 等多种手段对前驱体以及MgO纳米片进行了表征.结果表明, 得到的MgO呈二维片状结构, 无杂相, 晶化度高且尺寸均一.相比于商品化MgO纳米颗粒, 该MgO纳米片表现出了较好的催化合成查尔酮性能, 其产率可达60％.%MgCl2 and CO (NH2) 2 were used as raw materials to prepare MgO porous nanosheets via hydrothermal method followed by calcination. SEM, TEM, XRD, FT-IR, TG and N2 adsorption-desorption were applied to characterize the MgO nanosheets and its precursor in details. Results showed that the as-prepared MgO nanosheets possessed two-dimensional sheet structure with an advance of pure phase, high crystallinity and uniform size. Compared with commercial MgO nanoparticles, the MgO nanosheets displayed high catalytic activity for synthesizing Chalcone with 60％ productivity.