氧化钛

The effective factors of reaction temperature,catalyst,gelatinization time and baking condition during the preparation process were studied.

采用溶胶－凝胶法制备10－30nm的二氧化钛，并研究了反应温度、催化剂、凝胶化时间及焙烧条件对粒子形成的影响。

The second is relative to the preparation and modification of nanoscale titanium dioxide hydrosol.

第二，研究了纳米二氧化钛水溶胶的合成及其表面改性。

The invention relates to a method for preparing a neutral mixed crystal nano TiO2 hydrosol with high stability, belonging to the photocatalytic active nano titanium dioxide material preparation process technical field.

本发明涉及一种高稳定中性混晶纳米TiO2水溶胶的制备方法，属光催化活性纳米二氧化钛材料制备工艺技术领域。

The result of UV-visible spectroscopy show that the absorption band of the titanium dioxide hydrosol is extend to visible light region, what'more the absorption band in ultraviolet region is strong and wide.

紫外-可见光漫反射吸收光谱分析表明，该纳米二氧化钛水溶胶在紫外光区具有强而宽的吸收带，且其吸收边(500nm)扩展到了可见光区，扩展了对光谱的吸收范围。

It was found that hydrothermal treatment could obviously promote the crystallization of TiO_2 at low temperature without heat-treatment.

这可能是由于该方法所制备的二氧化钛光催化剂具有高的比表面积和小的晶粒尺寸引起的。

Titanium dioxide (TiO_2) is one of the most promising photocatalysts due to its chemical inertness, non-toxic nature, low cost, and has been studied for decades.

二氧化钛(TiO_2)具有很强的光催化和亲水性能，且其化学性质稳定、无毒、成本低，是理想的光催化剂。

After the irradiation about 2 hours, the removal of TN in the photocatalytic reaction is more than 50%.

二氧化钛的膜，经过2小时的光照，总氮去除率可达50%以上。

Titanium dioxide ; kieselguhr ; photocatalyst ; photocatalytic activity.

二氧化钛；硅藻土；光催化剂；光催化活性

Ce-TiO2/kieselguhr photocatalysts were prepared by sol-gel method under alkalescent conditions, and characterized by X-ray diffractrometry, scanning electron microscopy and DRS.

摘 要：以硅藻土为载体，用溶胶凝胶法将铈掺杂二氧化钛包覆在硅藻土上(Ce-TiO2/KL)。

KRONOS is one of the world's largest producers of titanium dioxide pigments used in paints, plastics, paper and consumer goods.

KRONOS是世界上最大的用于油漆、塑料、纸张和消费品的二氧化钛颜料生产商。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。