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中文摘要：
采用水热法,以 Na2 WO4·2H2 O 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。
英文摘要：
WO3 nanorod arrays were prepared on indium tin oxide （ ITO ） substrates by hydrothermal synthesis with Na2 WO4·2H2 O as a raw material and NaCl as an additive. The nanorods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and high-resolution transmission electron microscopy. The effects of pH values on the morphology, size, and orientation of products were studied. The results show that the single crystalline WO3 nanorod is hexagonal. When the pH value of the precursor solution increases, WO3 nanorod bundles parallel to the substrate turn into nanorod arrays vertical to the substrate. In addition, two different orientation WO3 nanorod structures were investigated by photocatalytic degradation of methyl blue solutions. It is found that the photocatalytic property of WO3 nanorod arrays is better than that of WO3 nanorod bundles.
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