【摘要】 以Na2WO4、K2SO4和H2C2O4为原料,采用两步水热合成法制备了六方相WO3纳米带。首先,在探索pH值、K2SO4加入量、反应温度和时间以及表面活性剂等因素对WO3纳米带的前驱物钨酸盐形貌的影响后,给出了前驱物钨酸盐纳米带的合成条件,并讨论了纳米带的形成机理;然后,在180℃的水热条件下对前驱物再处理48 h获得六方相WO3纳米带。测试结果表明,WO3纳米带的形貌保持较好,宽度在100~300 nm间,长度可达数微米,沿纳米带长轴方向为[001]方向。更多还原

【Abstract】 Hexagonal WO3 nanobelts were prepared using appropriate amounts of Na2WO4,K2SO4 and H2C2O4 by two-step hydrothermal procedure.Based on the investigation of the pH value,the added content of K2SO4,reaction temperature and time as well as different surfactants,the synthesis condition of precursor nanobelts and formation mechanism were suggested.Using the precursor nanobelts,hexagonal WO3 nanobelts can be obtained under the second hydrothermal treatment.The measurement results show that the WO3 nanobelts with 100~300 nm of width and many micrometers of length keep very well.更多还原