微波辐照掺氮改性有序多孔TiO_2微球制备与光催化性能研究

Preparation and Photocatalysis Property of N-doped Ordered Porous TiO_2 Balls by Microwave Treatment

采用溶胶-凝胶法和胶体晶体模板法制备了有序多孔TiO2微球,在微波辐照条件下对其掺氮改性,利用FTIR、SEM、XRD、XPS分析等方法对掺氮TiO2材料进行表征,并研究掺氮前后TiO2材料的光催化性能。实验结果显示,所制备有序多孔TiO2微球整体较致密,但局部有孔洞塌陷。微波辐照前后有序多孔TiO2微球的晶型没有改变,依然为锐钛型。XPS分析发现微波辐照制备掺氮有序多孔TiO2微球是可行的,且有序多孔TiO2微球中氮元素质量分数约为1.24%。掺氮有序多孔TiO2微球的光催化性能好于未掺氮TiO2的光催化性能。

The ordered porous TiO2 bails were prepared by colloidal crystal template method, and N-doped porous TiO2 balls with visible light catalytic activity were obtained by microwave radiation. The N-doped porous TiO2 materials were characterized by SEM, XRD and XPS. The results show that the colloidal crystal template is ordered which is prepared by polystyrene with hydroxide radical, the porous TiO2 balls are densification and regulation. The crystal formation of porous TiO2 isn＇t changed by microwave treatment, which is anatase. XPS analysis shows that Ndoped TiO2 can be prepared by microwave irradiation and the content of N element is 1. 24 %. The photocatalysis property of N-doped TiO2 is better than that of the pure TiO2.