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考察了两种方法制备的BiOI光催化剂,结果显示溶剂热法制备的BiOI比液相沉淀法制备的BiOI具有更好的光催化活性.然后,以溶剂热法制备的BiOI采用浸渍法制备了CoOx/BiOI复合催化剂,用X射线衍射(XRD)、紫外-可见(UV-vis)漫反射光谱、透射电子显微镜(TEM)等手段对其进行了表征,探讨了煅烧温度,煅烧时间以及Co掺杂量对其光催化性能的影响.结果显示:在300℃煅烧2h,Co的掺杂量为2.0%(Co/BiOI)的条件下,CoOx/BiOI复合物紫外光催化活性最高.结构研究表明,Co是以Co3O4的形式呈针状分布在团聚后的BiOI的表面,这有效地促进了BiOI的光催化性能.
The BiOI photocatalysts prepared by the two methods were investigated and the results showed that BiOI prepared by solvothermal method had better photocatalytic activity than BiOI prepared by liquid-phase precipitation method. Then, CoOx / BiOI composite catalysts were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy and transmission electron microscopy (TEM). The effects of calcination temperature, calcination time and Co doping The results showed that the CoOx / BiOI composite exhibited the highest UV activity under the conditions of calcination at 300 ℃ for 2h and Co addition of 2.0% (Co / BiOI) Co is needle-like distributed in the form of Co3O4 on the surface of the agglomerated BiOI, which effectively promoted the photocatalytic performance of BiOI.