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以水热法合成了不同形貌的BiOBr样品.采用X射线衍射(XRD)、扫描电子显微镜(SEM)、氮气吸附脱附曲线和紫外可见漫反射光谱(UV-Vis DRS)研究溶剂对BiOBr样品的晶形、形貌、孔径分布和比表面积、光学性质的影响;以罗丹明B(RhB)为目标降解物,研究溶剂对BiOBr的可见光催化性能的影响.实验结果表明,采用EG为溶剂的BiOBr在可见光降解RhB中表现出最佳的降解效果,因其较采用HNO_3、GL和PVP为溶剂的样品具有更高I_((001))/I_((102)),更小的禁带宽度和更均一的纳米片形貌.此外,阐述了溶剂对光催化降解RhB的影响机理.
BiOBr samples with different morphologies were synthesized by hydrothermal method. The effects of solvent on the BiOBr samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption curve and UV-Vis DRS The influence of the solvent on the photocatalytic activity of BiOBr was studied by RhB (RhB) as the target degradation material.The experimental results show that using BiOBr with EG as the solvent, Showed the best degradation effect in visible light degradation RhB because of its higher I_ ((001)) / I_ ((102)), smaller forbidden band width and More uniform morphology of nanosheets.In addition, the mechanism of solvent on photocatalytic degradation of RhB was described.