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采用水热法,以Na2WO4·2H2O为原料,NaCl为添加剂,直接在氧化铟锡透明导电基底上制备了有序WO3纳米棒阵列.利用X射线衍射、扫描电子显微镜、透射电子显微镜和高分辨透射电子显微镜等手段对制备的纳米棒进行了表征,考察了pH值对产物形貌、尺寸和取向性的影响.结果表明:单根WO3纳米棒具有六方单晶结构,随着前驱液pH值的增大,平行于基底生长的WO3纳米棒捆逐渐转变为垂直于基底生长的纳米棒阵列.另外,对制备得到的两种不同取向的WO3纳米棒结构进行了光催化降解甲基蓝溶液的研究,发现相比于WO3纳米棒捆结构,纳米棒阵列的光催化性能更高.
The ordered WO3 nanorod arrays were prepared directly on indium tin oxide transparent conductive substrate by hydrothermal method using Na2WO4 · 2H2O as raw material and NaCI as additive.Using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and high resolution transmission The effect of pH value on the morphology, size and orientation of the product was investigated.The results show that the single WO3 nanorods have a hexagonal single crystal structure, with the pH value of the precursor solution The WO3 nanorod bundles growing parallel to the substrate gradually transformed into the nanorod arrays perpendicular to the substrate growth.In addition, two kinds of WO3 nanorod structures with different orientations were studied for the photocatalytic degradation of methyl blue solution It was found that the photocatalytic performance of the nanorod arrays was higher than that of the WO3 nanorod bundles.