以TaCl5和Na2 WO4为原料，采用水热法在170℃保温6h~48h合成钽掺杂球形氧化钨。利用XRD、SEM等手段对产物进行物相、形貌表征。研究表明：水热反应时间为6 h~48 h均能获得三斜晶型的氧化钨球，球体尺寸在200 nm~350 nm之间。对不同反应时间条件下合成的氧化钨球进行紫外-可见光的吸收光谱分析可知，随着反应时间的增加，获得钽掺杂氧化钨样品对光的吸收能力增强，平均禁带宽度为3．72 eV。
Global tungsten oxide doped with tantalum were synthesized by a facile hydrothermal method using TaCl5 and Na2 WO4 as raw materials at 170℃ for 6h ~48h. The samples of the products were characterized by XRD,SEM and IR. The results showed that the global tungsten oxide powders with the pure triclinic phase in the grain size range from 200 to 350 nm can be synthesized at 6 h~48 h at 170℃. The optical absorption preoperties of the samples were characterized by UV-VIS. As the reaction time increasing,the optical absorption of synthesized global tungsten oxide doped with addition of tantalum increased gradually,and the average band gap was 3. 72eV.
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