材料期刊网，材料期刊，材料类期刊，材料期刊投稿

This review summarizes the various techniques developed for fabricating nanotube arrays in porous anodic alumina membranes (AAMs). After a brief introduction to the fabrication process of AAMs, taking carbons, metals, semiconductors, organics, biomoleculars, and heterojunctions as typical examples, attention will be focused on the recently established methods to fabricate nanotubes in AAM, including electrochemical deposition, surface sol-gel, modified chemical vapor deposition, atomic layer deposition, and layer-by-layer growth. Every method is demonstrated by one or two reported results. Finally, this review is concluded with some perspectives on the research directions and focuses on the AAM-based nanotubes fields.

关键词: Nanotube , Template , Anodic , alumina , membra

Single Crystal Fe Nanowire Arrays Encapsulated by SiO2 Nanotubes

Qing LIN , Lianzeng YAO , Guowei JIANG , Chuangui JIN , Weifeng LIU , Weili CAI , Zhen YAO

材料科学技术（英文）

Aligned silicon dioxide nanotubes with diameter of 60~70 nm were synthesized inside the nanoholes of an anodic Al membrane (AAM) template by pressure impregnating the AAM pores with the SiO¬2 sol. The SiO¬2 nanotubes with different wall thickness were produced by repeating the process. Using the second-order template of porous AAM with silicon dioxide nanotubes, it was fabricated the nanostructure of Fe nanowires encapsulated by SiO¬2 nanotubes by electrochemical deposition. Scanning electron microscope (SEM) and transmission electron microscope (TEM) observations show that the nanotubes and nanocables are compact, continuous and uniform. Selected area electron diffraction (SAED) pattern shows the Fe nanowire is a single crystal. The magnetic properties of these samples were checked by a vibrating sample magnetometer (VSM). The coercivities of the samples are greatly improved compared to the corresponding bulk materials.

关键词: Template , null , null , null

Two Alternative Routes to MS2 Nanotubes

Yanqing LIU

材料科学技术（英文）

Inorganic tubular nanostructure MS2 (M=Mo, W, Nb, Ta) were synthesized by two alternative routes. Thermal decomposition method was used for producing fullerence-like MS2 (M=Mo, W) nanotubes on Al2O3 template using ammonium sulfur respectively; NbS2, and TaS2 nanotubes were obtained successfully by reducing corresponding metal trisulfide in a stream of H2 (mixed with N2 in some cases) at elevated temperatures. Detailed experimental procedure, and the characterization of associated results, were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The result reveals that products are composed of high density of MS2 tubular nanostructures with the diameter of 100 nm and length of tens of micrometers. And no mistake, these 1-D (one-dimensional) tubular nanomaterials added quantities and varieties in the growing family of nanotubes of inorganic layered materials.

关键词: Dichalcogenide , thermol , decomposition , ga

基于催化应用调控氧化铈纳米材料的形貌

塔娜 , 刘景月 , 申文杰

催化学报 doi:10.1016/S1872-2067(12)60573-7

催化剂的设计、合成和结构调控是获得优异性能的关键.传统的策略主要是尽量减小催化剂颗粒尺寸以增加活性中心的数目,即尺寸效应.近年来,材料科学的快速发展使得在纳米尺度上调变催化剂的尺寸和形貌成为可能,特别是通过形貌调控可暴露更多的高活性晶面,大幅度提高催化性能,即纳米催化中的形貌效应.因此,调节催化剂的尺寸与形貌可以单独或协同优化材料的性能.氧化铈作为催化剂的重要组分与结构、电子促进剂被广泛应用于多相催化剂体系.本文总结了近期氧化铈材料形貌可控合成的进展,包括主要的合成策略和表征方法;进而分析了氧化铈和金-氧化铈催化材料的形貌效应,指出金-氧化铈之间独特的相互作用与载体形貌密切相关;阐述了氧化铈纳米材料因暴露晶面的差异而获得不同催化性能的化学机制.

关键词: 二氧化铈 , 纳米棒 , 纳米管 , 纳米立方体 , 形貌效应 , 金-氧化铈界面

自下而上法制备金-介孔二氧化硅复合纳米管用作还原4-硝基苯酚的催化剂

彭永胜 , 冷文光 , 董彬 , 格日乐 , 段洪东 , 高艳安

催化学报 doi:10.1016/S1872-2067(14)60310-7

采用自下而上方法制备了金-介孔二氧化硅复合纳米管，其中金纳米粒子作为催化剂嵌在介孔二氧化硅纳米管管壁内侧。金纳米颗粒的团聚、脱落和晶粒尺寸生长都可以被有效限制，而且催化剂负载量和尺寸大小均可实现简单控制。管壁中的介孔孔道、纳米管末端开口以及一维中空管道可以协同促进反应物扩散，从而提高4-硝基苯酚还原反应活性。循环实验证明这种复合纳米管催化剂具有良好的可重复使用性，而且在反应过程中未出现金纳米粒子脱落或团聚现象。

关键词: 金 , 介孔二氧化硅 , 纳米管 , 自下而上方法 , 催化剂 , 4-硝基苯酚还原

一维CeO2纳米管载体对Pd纳米粒子团聚的抑制及催化性能的提高

唐紫蓉 , 尹霞 , 张燕辉 , 张楠 , 徐艺军

催化学报 doi:10.1016/S1872-2067(12)60536-1

用一维CeO2纳米管替代非一维结构的商用CeO2,用于负载Pd而制得的催化剂在空气气氛下高温煅烧过程中Pd纳米粒子的团聚受到明显抑制,在选择性有氧氧化苯甲醇生成苯甲醛反应中,所制CeO2纳米管负载的Pd催化剂表现出更高的催化活性.可见,一维金属氧化物材料有望用作载体以抑制贵金属纳米粒子的团聚,从而提高其催化性能.

关键词: 二氧化铈 , 纳米管 , 钯 , 纳米粒子 , 载体效应 , 选择性氧化