【摘要】 研究溶剂对Bi/BiOBr光催化活性的影响.以硝酸铋、溴化钾为原料,采用一步溶剂热法在不同溶剂条件下制备Bi/BiOBr光催化剂,通过降解模拟污染物罗丹明B评价样品的光催化活性,利用XRD,SEM,BET,DRS等表征手段对样品进行测试.结果表明:当反应溶剂为乙醇时,样品的光催化活性最佳,在7W LED灯照射140min后,对6mg/L罗丹明B溶液的降解率为87.8%.样品具有较高的比表面积和较好的光催化循环稳定性;降解过程中,h⁺和·O₂^-是主要的活性物种.更多还原

【Abstract】 The effect of solvent on Bi/BiOBr photocatalytic activity was studied.Bi/BiOBr photocatalysts were prepared by one step solvothermal method using bismuth nitrate and potassium bromide as raw materials under different solvent conditions.The photocatalytic activity of Bi/BiOBr photocatalysts was evaluated by degradation of rhodamine B,a simulated pollutant.The samples were characterized by XRD,SEM,BET and DRS.The results show that the photocatalytic activity of the sample is the best when the reaction solvent is ethanol.The degradation rate of 6 mg/L Rhodamine B solution is 87.8% after 140 minutes irradiation with 7 W LED lamp.The sample has high specific surface area and good photocatalytic cycling stability;h⁺ and·O₂^- are the main active species in the degradation process.更多还原