N-Al/TiO2催化剂的制备及可见光降解染料

采用溶胶-凝胶法分别制备了N、Al单掺杂与N、Al共掺杂的TiO_2复合材料,考察了4种催化剂在可见光下对染料甲基橙、亚甲基蓝、罗丹明B的光降解效率。采用XRD、SEM、XPS、UV-Vis DRS、N2吸附-脱附手段对催化剂进行表征和评价。结果表明:N、Al共掺杂后的Ti O2骨架晶型仍保持为锐钛矿型,比表面积增加,团聚现象略有减少,且N、Al共掺杂TiO_2催化剂在可见光下对甲基橙的降解效果最佳,脱色率可达70%左右。

Preparation of N-Al/TiO2 Catalysts and Visible Light Degradation Dyes

N, Al doped TiO2 and N, Al co-doped TiO2 composites were prepared by sol-gel method, respectively. The photocatalytic degradation efficiency of dyes methyl orange, methylene blue and rhodamine B under visible light was studied. The catalysts were characterized and evaluated by XRD, SEM, XPS, UV-Vis DRS, and N2 adsorption-desorption. The experimental results show that the crystal structure of N, Al co-doped TiO2 remains as anatase, the specific surface area increases, and the agglomeration phenomenon slightly decreases. N, Al co-doped TiO2 catalyst has the best degradation effect on methyl orange under visible light, and the decolorization rate can reach 70%.