纳米

In this paper, the processes of electroless Ni-P, Ni-Fe-Co-P and Ni-Co-B platingwere investigated by using graphite pieces as samples first, and then Ni-P, Ni-Fe-Co-Pand Ni-Co-B coatings were deposited onto carbon nanofibers by using the selectedelectroless processes. The composition, structure of the coatings and the properties ofthe metal-coated carbon nanofibers were also studied.

本文首先利用石墨基片研究了化学镀镍磷合金、镍铁钴磷合金和镍钴硼合金工艺，然后利用优化的化学镀工艺在纳米碳纤维表面镀覆了Ni-P、Ni-Fe-Co-P和Ni-Co-B镀层；研究了镀层的成分、结构以及镀层纳米碳纤维的性能。

The degree of hydrogenation of methyl benzoate might be controled by adding the promoters and changing the nano-size of ZnO. For hydrogenation of methyl benzoate to benzaldehyde, the active-structure of a catalyst should be modified to decrease the absorption of benzaldehyde on the surface of it, because benzaldehyde absorbed is hydrogenated easily. Using 30-40％ZnO/γ-Al〓O〓 or Li-30％ZnO/γ-Al〓O〓, a higher selectivity to benzaldehyde is obtained. Hydrogenolysis of methyl benzoate to toluene or benzene is carried out effectively using a catalyst modified. For instance, 45.3％ selectivity to benzene and 100％ conversion of methyl benzoate at 420℃ was obtained over 10％ZnO/MCM-41 with the nano-size particles of ZnO (2.4nm).

也可以通过助催化剂的添加和活性组分的纳米化，并根据苯甲酸甲酯多步加氢反应的特点实行加氢深度的调控：苯甲酸甲酯选择性加氢制苯甲醛中，由于苯甲醛容易进一步加氢，需要对活性结构进行调变，以减弱苯甲醛的吸附，使用30-40％ZnO/γ-Al〓O〓催化剂或Li调变的Li-30％ZnO/γ-Al〓O〓催化剂，可获得较高的苯甲酸甲酯加氢制苯甲醛的活性；采用同样的方式，苯甲酸甲酯选择性氢解为甲苯或苯也获得了较好的结果，如使用ZnO纳米化的10％ZnO/MCM-41催化剂，在420℃，可获得45.3％的苯选择性，苯甲酸甲酯完全转化。

Nano-TiO2 co-doped with La(superscript 3+)-Fe(superscript 3+) was prepared by sol-gel method and the photocatalystic activity under ultra-violet light was evaluated by photocatalytic degradation of methyl blue.

采用溶胶－凝胶法制备了La(上标 3+)-Fe(上标 3+)共掺杂的TiO2纳米粉体，并以亚甲基蓝溶液为目标降解物研究了掺杂纳米TiO2粉体在紫外光作用下的光吸收和光催化性能。

The wires were highly uniform in size, several microns long, but only about 50 nanometers in diameter.

这些纳米线的大小高度统一，它们的长度均为数微米，而直径仅为50纳米左右。

It has been well known that the activity of a BN particle might increase to a large extent when its size minished to several nanometers. As a result, the temperature and pressure required for the phase transformation will decrease accordingly.

氮化硼纳米颗粒的物相稳定性研究已有的研究结果表明：当氮化硼颗粒的粒度减小到纳米量级时，它的活性显著提高，发生物相转变所需要的温度和压力随之降低。

Light yellow nitrogen-doped nano-TiO2 powders were prepared by directly calcining the mixture of anatase TiO2 powders and guanidine hydrochloride in the muffle furnace at different temperatures.

以锐钛矿相纳米TiO2粉体和盐酸胍的混合物为起始反应物，通过在不同温度条件下对反应物直接进行热处理制得了淡黄色的掺氮纳米TiO2粉体。

One fundamental aspect of nanotechnology is that a downsizing process has been used to reach a certain nanometre range to obtain new material properties.

纳米技术的一个基本方面是利用小型化处理来达到纳米级以便获得新材料的特性。

In February 2000,U S A worked out the strategy of National Nanometre Technology, which evoked worldwide repercussions . Japan and Europe also successively worked out their development program of NT.

20 0 0年 2月美国制定了&国家纳米技术战略&，引起世界各国的巨大反响，日本、欧洲的工业先进国家先后制定了纳米技术发展规划。

Nanometre technology ; nanometre materials ; development program

纳米技术；纳米材料；研究计划

With the extensive research on nanometre materials

随着纳米材料研究的广泛开展，PET-层状硅酸盐纳米复合材料也成为研究热点之一。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。