介绍了一种利用声化学方法，通过改变前驱体的浓度来制备Bi2S3@TiO2(B)纳米异质体的方法。通过透射电子显微镜、XRD衍射、紫外-可见漫反射光谱等表征手段发现，Bi2S3纳米颗粒成功合成在TiO2(B)纳米线上，合成的产物可看做是Bi2S3@TiO2(B)纳米异质体。通过对Bi2S3(8%)@TiO2纳米异质体的( Ep)2和Ep作图发现，复合材料的带宽大约是1.64 eV。这个结果说明，在可见光下，Bi2S3@TiO2(B)纳米异质体拥有较好的光催化性能，并且兼顾了Bi2S3和TiO2各自的优势，实验证实该材料是一种较好的光催化剂，在催化领域具有潜在的应用价值。%The controlled Bi2S3@TiO2(B) nano-heterostructures with the precursors at different concentrations were synthesized by a so-nochemical route. The morphology, crystal structure and optical property of the as-prepared Bi2S3@TiO2(B) nano-heterostructures were characterized by TEM, XRD and UV–vis diffuse reflectance spectroscopy. The results revealed that Bi2S3 nano-particles were success-fully grown on the primary TiO2 NWs. The hybrids had lengths of up to a few micrometers and had the extended absorption in the visible range. In particular, the band gap of the hybrid was 1.64 eV, which was lower than 3.2 eV of the TiO2 in the anatase form. Due to the ex-tended absorption in the visible range, the prepared Bi2S3@TiO2(B) nano-heterostructures may possess high photocatalytic properties un-der visible light irradiation.
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