采用水热合成法制备了硅钨酸掺杂的纳米Bi 2 O 3/TiO 2复合粉体。对样品进行了XRD、TEM、FT-IR、UV-vis表征，以样品在紫外灯下对水中罗丹明B的降解性能为指标，评价了其光催化性能。研究结果表明，硅钨酸掺杂使样品的光催化性能逐渐降低，当硅钨酸掺杂量为(Ti+Bi)的0.5%(mol/mol)，光催化性能又有提高；硅钨酸掺杂后纳米粉体出现团聚现象，继续增加原料中的硅钨酸，团聚现象逐渐明显，样品中晶体的增长速度加快，颗粒团聚现象加重；样品不易吸附水，不易羟基化，掺杂后纳米复合粉体的红外吸收峰均有部分蓝移，M-O-M(M为Bi或Ti)键强度逐渐增强。%Nanometer composite powders of bismuth oxide and titanium dioxide were prepared by the hydrothermal method, which were doped by silicotungstic acid. The samples were characterized by XRD, TEM, FT-IR and UV-vis, meanwhile, the photocatalytic performance of the samples was estimated by degrading rhodamine B solution under irradiation of UV-lamp. When the samples are doped with silicotungstic acid, the photocatalytic performances of the samples decrease. At doped mole ratio of 0.5% (Ti+Bi), photocatalytic performance increases and agglomeration begins to emerge. Doped with silicotungstic acid, the growing velocity of the crystal is rapid and the agglomeration is serious, and the crystals are hard to absorb water and to be hydroxylated. When compound powders is doped with silicotungstic acid, the nano composite powder infrared absorption peaks are part of blue shift and the intensity of M-O-M (M is Bi or Ti) becomes strong gradually after doping.
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