一种简单可控的Bi_2S_3@TiO_2(B)纳米异质体合成方法

A Facile and Controllable Method for Synthesizing Bi_2S_3@TiO_2(B) Nano-heterostructures

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1.64eV。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@Ti O2（B） nano-heterostructures with the precursors at different concentrations were synthesized by a sonochemical route. The morphology, crystal structure and optical property of the as-prepared Bi2S3@TiO 2（B） nano-heterostructures were characterized by TEM, XRD and UV–vis diffuse reflectance spectroscopy. The results revealed that Bi2S3nano-particles were successfully grown on the primary Ti O2 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 e V, which was lower than 3.2 e V of the Ti O2 in the anatase form. Due to the extended absorption in the visible range, the prepared Bi2S3@TiO 2（B） nano-heterostructures may possess high photocatalytic properties under visible light irradiation.