不同方法制备的掺钆TiO_2纳米粒子的自然光催化活性的研究

Solar-ray Photocatalysis Characteristics of Nano-titania Particle Doped with Gadolinia Made in Different Ways

利用两种溶胶 -凝胶制备方法 ,即无机法和有机法 ,分别制备了几种掺稀土Gd2 O3 的TiO2 纳米晶子 ,通过XRD研究了此光催化剂的结构与特征 ,并以甲基橙为目标降解物 ,考查其在自然光下的催化氧化活性 .结果表明 ,无机法制备的样品颗粒尺寸较有机法制备的样品颗粒尺寸大 ;适量掺钆能够显著拓宽TiO2 的光吸收范围 ,使其在日光下催化降解有机物成为可能 ;催化剂的活性不仅与小尺寸效应 ,表面效应有关 ,而且与杂质的属性密切相关 .

Employed are two different sol gel methods of organic and inorganic. Several kinds of Nano titania particles doped with Gd 2O 3 are prepared. The structure and characteristics of these photocatalysises are investgated with XRD.The photocatalysis oxidation ablitity is also researched by utilizing methyl orange as degradation agent.The experimental results show that the dimension of particles made by inonganic method is bigger than that made by organic way and amount Gd 2O 3 doped can greatly enhance the light adsorption range of titania,which make it possible that degrades organic under solar ray.It is concluded that the actibity of catalyst is related with not only small size effect and surface effect,but also the depings attribute.