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制备了具有有序孔洞多孔阳极氧化铝(AAO),并以之为模板通过溶胶-凝胶法制备高度取向的WO3·H2O纳米线阵列,用X射线衍射、XPS、扫描电镜(SEM)和比表面积仪进行表征。结果表明:WO3·H2O纳米线线径与AAO模板的孔径一致,且分布均匀,线径为26 nm,线长为1.1μm;与相同条件下用玻纤布作载体制备的WO3·H2O膜相比,其平均晶粒小,低密度,高比表面积。将催化剂WO3·H2O/AAO与WO3·H2O/玻纤布两者分别对气相甲醛进行光催化降解反应以评价它们的光催化活性,得出WO3·H2O纳米线阵列光催化降解气相甲醛反应速率常数大约是WO3·H2O/玻纤布的3.4倍,说明以AAO为模板制备的WO3·H2O纳米线阵列具有更高的光催化活性。
Porous anodic alumina (AAO) with ordered pores was prepared and used as template to prepare highly oriented WO3 · H2O nanowire arrays by sol-gel method. X-ray diffraction, XPS, scanning electron microscopy (SEM) Surface area meter for characterization. The results show that the diameter of WO3 · H2O nanowires coincides with that of AAO template, and the distribution is uniform. The diameter of WO3 · H2O nanowire is 26 nm and the line length is 1.1 μm. Compared with the WO3 · H2O membrane prepared with glass fiber cloth Compared with the average grain size, low density, high specific surface area. The WO3 · H2O / AAO and WO3 · H2O / fiberglass fabrics were respectively photocatalytically degraded to evaluate their photocatalytic activities. The photocatalytic degradation rate of WO3 · H2O nanowire arrays for gaseous formaldehyde reaction was obtained About 3.4 times higher than that of WO3 · H2O / glass fiber cloth, indicating that the WO3 · H2O nanowire arrays prepared with AAO have higher photocatalytic activity.