工程材料學(xué)

爆轟納米金剛石在水性介質(zhì)中單分散性能

楊玉東，徐菁華，楊林梅

采用激光液相法，以爆轟納米金剛石（PCD）為原料，在聚乙二醇（PEG200）溶液中得到單分散的納米金剛石（LPCD）.利用TEM、XRD、FTIR、VSM和PL光譜等手段對(duì)LPCD的形貌、粒徑、發(fā)光和磁性能進(jìn)行表征.結(jié)果表明，混酸氧化處理的PCD能穩(wěn)定分散在PEG200溶液中，但仍有一次團(tuán)聚體.采用激光輻照得到的LPCD，具有較強(qiáng)的鐵磁性，更大的比表面積和更多的表面懸鍵.激光輻照的同時(shí)發(fā)生了原位表面化學(xué)修飾，LPCD出現(xiàn)了特有的羥基（C-OH）峰和PEG200基團(tuán)，粒子分散性好，沒有一次和二次的團(tuán)聚體，其平均粒徑為5.5 nm.

納米金剛石；激光液相法；單分散；磁性能

來(lái)源出版物：新型炭材料，2015，30（2）: 181-185

聯(lián)系郵箱：楊玉東，songzx07@163.com

基于油菜花粉模板制備ZnAlCe三元復(fù)合氧化物多孔材料及其催化性能研究

段勝聰，孟自珍，解晶，等

采用油菜花粉為生物模板、LDHs晶核溶液為前驅(qū)體，通過(guò)共沉淀、輔助微波晶化方法，經(jīng)原位生長(zhǎng)和煅燒，簡(jiǎn)單溫和地合成了ZnAlCe三元復(fù)合氧化物多孔材料.采用SEM、FT-IR、XRD、EDX、XPS和 N2吸附-脫附分析等對(duì)其進(jìn)行形貌與結(jié)構(gòu)的表征，并對(duì)其催化H2O2-α-蒎烯環(huán)氧化反應(yīng)進(jìn)行了測(cè)定.結(jié)果表明，ZnAlCe三元復(fù)合氧化物能復(fù)制花粉模板表面的微納米結(jié)構(gòu)，多級(jí)孔有序排列，孔徑分布在2～150 nm范圍的介孔與大孔尺寸之間，比表面積達(dá)112.94 m2/g，具有良好的結(jié)晶度，晶型規(guī)整；當(dāng)α-蒎烯/H2O2摩爾比為1∶1.4、催化劑用量為15.0 mg、溶劑（乙酸乙酯/H2O體積比=4∶1）為2 mL、30℃下反應(yīng)4 h時(shí)，α-蒎烯轉(zhuǎn)化率可達(dá)61.81%，產(chǎn)物2，3-環(huán)氧蒎烷、馬鞭草烯醇和馬鞭草烯酮的選擇性分別為40.54%、27.36%、32.10%.

ZnAlCe三元復(fù)合氧化物；油菜花粉；生物模板；α-蒎烯氧化

來(lái)源出版物：無(wú)機(jī)材料學(xué)報(bào)，2015，30（4）: 420-426

聯(lián)系郵箱：陳春霞，ccx1759@163.com

來(lái)源出版物：SCIENCE CHINA Materials，2015，58（4）: 289-293聯(lián)系郵箱：Huisheng Peng，penghs@fudan.edu.cn

封面介紹：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