一种TiO2可见光光催化剂的制备方法

一种ＴｉＯ↓［２］可见光光催化剂的制备方法是将钛醇盐和乙醇反应得到透明液体之后，将该液体滴加到去离子水中，形成白色悬浊液后用无机酸调节ｐＨ值，经过超声处理，在８０～１６０℃反应５～２０小时，得到ＴｉＯ↓［２］纳米晶溶胶；将溴化胺按溴化胺滴加到ＴｉＯ↓［２］纳米晶溶胶中，滴加完毕继续回流反应５～１０小时，然后减压蒸发溶剂，得到干凝胶，以乙醇为溶剂对干凝胶抽提萃取，在１００～１２０℃下干燥，得到ＴｉＯ↓［２］可见光光催化剂。本发明具有操作简单、反应条件温和、设备成本低、较强的可见光吸收和良好的可见光光催化性能等优点。

高折射率纳米晶TiO2溶胶-凝胶薄膜制备的方法

一种高折射率纳米晶ＴｉＯ↓［２］溶胶－凝胶薄膜制备的方法，钛醇盐先进行快速水解，然后用无机酸胶溶，在溶胶－凝胶过程中形成晶相ＴｉＯ↓［２］纳米颗粒，从而显著提高目标光学薄膜的折射率。本发明具有操作简单、反应条件温和、大面积无规则镀制、设备成本低和光学薄膜折射率高的优点。

用于费托合成重质烃的Co/TiO2催化剂及制备方法

一种用于费托合成重质烃的Ｃｏ／ＴｉＯ↓［２］催化剂重量百分比组成为：Ｃｏ８－１５ｗｔ％载体８５－９２ｗｔ％所述载体为重量比是ＺｒＯ↓［２］∶ＴｉＯ↓［２］＝０－１０∶１００的物质。提供了控制载体晶相的方法、制备了具有成本低、高性能的费托合成催化剂。

一种CeO2-TiO2复合氧化物载体及其制备方法

一种ＣｅＯ↓［２］－ＴｉＯ↓［２］复合氧化物载体，其特征在于Ｃｅ∶Ｔｉ（摩尔比）为０．０５－０．４∶１，粒径为１－１００ｎｍ，比表面积为５０－２５０ｍ↑［２］·ｇ↑［－１］，孔体积为０．３－１．２ｃｍ↑［３］·ｇ↑［－１］，采用一般的混合沉淀、抽滤、洗涤、干燥、焙烧可制成不同比例的水凝胶、醇凝胶、气凝胶ＣｅＯ↓［２］－ＴｉＯ↓［２］复合氧化物载体，其特征在于采用钛的无机物为原料，所以大大降低了成本。

Preparation of TiO2 nanocrystallites by hydrolyzing with gaseous water and their photocatalytic activity

TiO2 nanocrystallites were prepared front precursors tetra-n-butyl titanate (Ti(OC4H9)(4)) and titanium tetrachloride (TiCl4). The precursors were hydrolyzed by gaseous water in autoclave, and then calcined at predetermined testing temperatures. The samples were characterized by X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectra (FT-IR), and UV-vis diffuse reflectance spectra (DRS). The photocatalytic activities of the samples were evaluated by the photobleaching of methylene blue (MB) in aqueous solution and the photocatalytic oxidation of propylene in gas phase at ambient temperature. The results showed that the anatase phase nanocrystalline TiO2 could be obtained at relatively low temperatures (for precursor Ti(OC4H9)4 at I I VC and for TiCl4 at 140 degrees C, respectively), and that the as prepared samples exhibited high photocatalytic activities to photobleach MB in aqueous solution. As the calcination temperatures increasing. the decolor ratio of MB increased and reached the maximum value of nearly 100% at 600 degrees C, and then decreased. The photobleaching of MB by all samples followed the pseudo-first-order kinetics with respect to MB concentration.

Fabrication of arrays of silver nanoparticle aggregates by microcontact printing and block copolymer nanoreactors

A combination of microcontact printing and block copolymer nanoreactors succeeded in fabricating arrays of silver nanoparticle aggregates. A complex solution of polystyrene-block-poly(4-vinylpyridine) micelles and silver salt was used as an ink to form thin films or droplets on polydimethylsiloxane stamp protrusions. After these complex aggregates were printed onto silicon substrates under controlled conditions, highly ordered arrays of disklike, dishlike, and dotlike complex aggregates were obtained. A Subsequent oxygen reactive ion etching treatment yielded arrays of silver nanoparticle aggregates.

TiO2-SnO2复合凝胶的水-乙醇蒸汽吸附动力学研究

中国科学院山西煤炭化学研究所

TiO2-SnO2复合凝胶的结构表征及其吸附与催化性能研究

中国科学院山西煤炭化学研究所