工程材料学

工程材料学

爆轰纳米金刚石在水性介质中单分散性能

杨玉东，徐菁华，杨林梅

采用激光液相法，以爆轰纳米金刚石（PCD）为原料，在聚乙二醇（PEG200）溶液中得到单分散的纳米金刚石（LPCD）.利用TEM、XRD、FTIR、VSM和PL光谱等手段对LPCD的形貌、粒径、发光和磁性能进行表征.结果表明，混酸氧化处理的PCD能稳定分散在PEG200溶液中，但仍有一次团聚体.采用激光辐照得到的LPCD，具有较强的铁磁性，更大的比表面积和更多的表面悬键.激光辐照的同时发生了原位表面化学修饰，LPCD出现了特有的羟基（C-OH）峰和PEG200基团，粒子分散性好，没有一次和二次的团聚体，其平均粒径为5.5 nm.

纳米金刚石；激光液相法；单分散；磁性能

来源出版物：新型炭材料，2015，30（2）: 181-185

联系邮箱：杨玉东，songzx07@163.com

基于油菜花粉模板制备ZnAlCe三元复合氧化物多孔材料及其催化性能研究

段胜聪，孟自珍，解晶，等

采用油菜花粉为生物模板、LDHs晶核溶液为前驱体，通过共沉淀、辅助微波晶化方法，经原位生长和煅烧，简单温和地合成了ZnAlCe三元复合氧化物多孔材料.采用SEM、FT-IR、XRD、EDX、XPS和 N2吸附-脱附分析等对其进行形貌与结构的表征，并对其催化H2O2-α-蒎烯环氧化反应进行了测定.结果表明，ZnAlCe三元复合氧化物能复制花粉模板表面的微纳米结构，多级孔有序排列，孔径分布在2～150 nm范围的介孔与大孔尺寸之间，比表面积达112.94 m2/g，具有良好的结晶度，晶型规整；当α-蒎烯/H2O2摩尔比为1∶1.4、催化剂用量为15.0 mg、溶剂（乙酸乙酯/H2O体积比=4∶1）为2 mL、30℃下反应4 h时，α-蒎烯转化率可达61.81%，产物2，3-环氧蒎烷、马鞭草烯醇和马鞭草烯酮的选择性分别为40.54%、27.36%、32.10%.

ZnAlCe三元复合氧化物；油菜花粉；生物模板；α-蒎烯氧化

来源出版物：无机材料学报，2015，30（4）: 420-426

联系邮箱：陈春霞，ccx1759@163.com

来源出版物：SCIENCE CHINA Materials，2015，58（4）: 289-293联系邮箱：Huisheng Peng，penghs@fudan.edu.cn

封面介绍：Platinum-modified carbon nanotube（CNT）fibers with controlled platinum weight percentages have been synthesized via an electrochemical deposition method. Platinum nanoparticles can be uniformly deposited on the surface of aligned CNTs in the fiber with a much improved catalytic activity compared with the carbon fiber without the aligned nanostructure. The hybrid CNT fiber is further used as a counter electrode to fabricate fiber-shaped dyesensitized solar cell，and a maximal power conversion efficiency of 8.10% has been achieved（see the article by Peng and coworkers on page 289）.

Synthesis and photovoltaic application of platinummodified conducting aligned nanotube fiber

Yishu Jiang，Hao Sun，Huisheng Peng

Platinum-modified carbon nanotube（CNT）fibers with controlled platinum weight percentages were synthesized via an electrochemical deposition method. Platinum nanoparticles can be uniformly deposited on the surface of the aligned CNTs in the fiber，which possesses anefficient improved catalytic activity in the reduction of I3-/I-compared with other fiber materials such as a carbon fiber without the aligned nanostructure. The hybrid CNT fiber was further used as a counter electrode to fabricate fiber-shaped dye-sensitized solar cell（DSSC）. A maximal power conversion efficiency of 8.10% was achieved，compared with that of 4.91% for a bare aligned CNT fiber and 5.50% for a platinum-modified carbon fiber as the counter electrode under the same condition.

Discrete element modeling； Fluidized beds； Solid fraction； Bed height； Grid zone； Multiple jets； Particle flux