CdSe纳米粒子负载的TiO2纳米带复合材料制备及其可见光催化性能

采用水热法制备了CdSe 纳米粒子负载的锐钛矿型TiO2纳米带复合材料,并对产物的晶体结构、形貌尺寸、CdSe负载量及其可见光催化性能进行了测试.结果表明,产物中CdSe纳米粒子以闪锌矿型面心立方结构负载在TiO2纳米带表面,负载量可控;虽然CdSe纳米粒子的负载降低了TiO2纳米带比表面积,但是显著增强了产物可见光吸...

Preparation of CdSe nanoparticle-deposited TiO2 nanobelts and their visible-light photocatalysis

A series of CdSe nanoparticle-deposited anatase TiO2 nanobelts were prepared by hydrothermal process. Their crystal structures, morphologies, depositing content of CdSe and visible-light photocatalytic activities were characterized using various measurement techniques. The measurement results show that the CdSe nanoparticles with zinc blende face-center-cubic structure and controlled content have deposited on anatase TiO2 nanobelts; the special surface areas of the products become lower in comparison with that of TiO2 nanobelts due to the deposited CdSe, whereas their visible-light absorptions exhibit much more obviously. The visible-light photocatalytic activities in degradation of rhodamine B solution demonstrate that the products with excess depositing content of CdSe nanoparticles and existence of NH3 molecules on the surface, show much lower photodegrada tion activities. On the contrary, the products with less CdSe nanoparticles and less NH3 molecules exhibit much higher photodegradation activities.