摘要：为了研究Gd³⁺、C⁴⁺离子掺杂TiO₂粉体的光催化活性,选取不同Gd^3+、C⁴⁺加入量、煅烧温度、气氛等因素,采用溶胶-凝胶法制备Gd³⁺-C⁴⁺掺杂Ti O2复合粉体;通过X射线衍射、显微图像观察、表面及孔隙度分析等手段对复合粉体的物相、形貌及光催化活性进行表征。结果表明:Gd³⁺-C⁴⁺掺杂TiO₂复合粉体在N₂气氛中经550℃煅烧2 h后,粉体分散较好,TiO₂仍为锐钛矿结构;当Gd³⁺与 C⁴⁺的物质的量比为0.06时,复合粉体在太阳光下照射3 h后,对罗丹明B的降解率可达90%。

关键词：二氧化钛；掺杂；光催化活性

Abstract： To study the photocatalytic property of TiO₂ nano-particles doped with Gd³⁺ and C⁴⁺， the amount of Gd³⁺ and C⁴⁺， different calcination temperatures and atmospheres were chosen in the experiment．The Gd³⁺-C⁴⁺ co-doped TiO₂ composite powders were prepared by a simple sol-gel method. XRD，TEM， specific surface analysis were used to characterize the composite powders．The results show that TiO₂ crystals co-doped withGd³⁺-C⁴⁺ and calcined at 550 ℃ for 2 h in nitrogen are anatase structure， the composite powders disperse evenly. When the molar ratio of Gd³⁺ and C⁴⁺ is 0.06， it possesses 90% degradation ratio of rhodamine B after 3 h sunlight irradiation. 

Keywords: titania； doping； photocatalytic activity