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以钨酸钠为原料,硫酸钾为辅助盐,在强酸性反应体系通过水热法合成了WO3纳米棒。利用XRD、SEM、TEM和SAED对试样进行分析,研究结果表明:在水热法体系中合成WO3纳米棒时,随着pH值的增加、反应温度的升高和反应时间的延长,它们都有利于合成WO3纳米棒。在pH值为1.5、反应温度为240℃和反应时间72.0h下合成直径小于100nm的晶态WO3纳米棒,此WO3纳米棒径向分布较均匀。对不同条件下水热法合成的WO3进行紫外可见光的吸收光谱分析可得,随着pH值的增加、反应温度的升高和反应时间的延长,获得的WO3的光吸收能力逐渐是增加的。特别是WO3纳米棒具有良好的光吸收能力。
Taking sodium tungstate as raw material and potassium sulfate as auxiliary salt, WO3 nanorods were synthesized by hydrothermal method in strong acid reaction system. The samples were analyzed by XRD, SEM, TEM and SAED. The results showed that when the WO3 nanorods were synthesized by hydrothermal method, with the increase of pH value, the increase of reaction temperature and the extension of reaction time, Conducive to the synthesis of WO3 nanorods. The WO3 nanorods with diameter less than 100nm were synthesized at pH 1.5, reaction temperature 240 ℃ and reaction time 72.0h. The WO3 nanorods were more evenly distributed in the radial direction. Under different conditions hydrothermal synthesis of WO3 UV-visible absorption spectrum analysis obtained, with increasing pH value, the reaction temperature and the reaction time, the WO3 obtained optical absorption capacity gradually increased. In particular, WO3 nanorods have good light absorption ability.