网状多级孔结构氧化铁的制备、合成机理及其光催化性质.pdfVIP

物理化学学报(Wuli Huaxue Xuebao) September Acta Phys. -Chim. Sin . 2012, 28 (9), 2209-2213 2209 [Article] doi: 10.3866/PKU.WHXB201207031 树枝状钯纳米结构的控制合成及硝基苯加氢反应的催化活性 谢 婷1 刘浩文1 杨汉民1,2,* ( 中南民族大学化学与材料科学学院, 武汉430074) 摘要: 以氯钯酸为前驱体, 苯甲醇为还原剂和溶剂, 十六烷基吡咯烷酮(PVP)为稳定剂, 在微波辐射下制备了 分散均匀、形貌均一的树枝状钯纳米结构. 产物用透射电子显微镜(TEM), X 射线粉末衍射(XRD), X 射线光电 子能谱(XPS)进行了表征, 表明所制备的Pd 纳米颗粒呈树枝状, 形貌单一, 分散均匀, 是由许多近似圆形的小 颗粒自组装而成的二级结构. 对树枝状钯催化硝基苯加氢反应进行探究, 表明树枝状钯的催化活性比市售的钯 碳催化剂的催化活性高. 关键词: 钯; 纳米结构; 微波辐射; 硝基苯加氢; 生长过程 中图分类号: O647 Control Synthesis of Branched Palladium Nanostructures and the Catalytic Activity on Hydrogenation Reaction of Nitrobenzene XIE Ting1 LIU Hao-Wen1 YANG Han-Min1,2,* (College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074, P. R. China) Abstract: Branched palladium nanostructures were synthesized under microwave irradiation using polyvinylpyrrolidone (PVP) as stabilizer and benzyl glycol as the reducing agent of H PdCl . Morphology 2 4 and structure were characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), and showed that the branched Pd nanostructures were self-assemblies of hundreds of small spherical nanoparticles. Furthermore, catalytic properties of the branched Pd nanostructures were investigated for the hydrogenation of nitrobenzene, which indicated that the catalytic