中文摘要：

文章主要报道了钇氮共掺杂的K2Nb4O11光催化剂的制备,XRD和SEM结果表明因为钇氮共掺杂的掺入量很少,对K2Nb4O11的晶体结构和表面形貌没有很大的影响.光催化活性表征结果显示,在可见光下对双酚A（BPA）的光催化降解,Y-K2Nb4O11-N的光催化活性远远高于单纯的或者钇掺杂的K2Nb4O11,也比Degussa P25 TiO2活性高.这表明,钇氮共掺杂对K2Nb4O11可见光响应活性具有很大的提高作用,因为钇的掺杂,钇离子在晶格中可以捕获被光激发的激发电子,抑制了电子空穴对的复合,从而提高光催化效率;而氮的掺杂可以缩小能隙,提高可见光的利用率.

英文摘要：

In the paper, the preparation of the yttrium and nitrogen co-doping K2Nb4O11 （Y-K2Nb4O11-N） photocatalyst was reported. The XRD and SEM results show that the crystal structure and surface morphology of K2Nb4O11 did not affect by doping due to the low doping concentrations of yttrium and nitrogen. The photo-catalystic property of the Y-K2Nb4O11-N for the bisphenol photocatalytic degradation was characterized under visible light. The results show that Y-K2Nb4O11-N had highest photocatalytic activity among the K2Nb4O11, yttrium doping K2Nb4O11 and Degussa P25 TiO2, which indicating that the photocatalytic activity has been improved greatly after the yttrium and nitrogen co-doping entering the crystal structure. The improvement of the photocatalytic activity of Y-K2Nb4O11t-N can be due to the recombination of electron and hole pairs was inhibited by the doped yttrium ions through capturing the excited electrons, while the nitrogen doping can narrow the band gap, improving the utilization of visible rate of light.