类片状纳米氧化铋的制备及其光催化性能研究  

Preparation and photocatalytic properties of sheet-like bismuth oxide nanomaterials

作　　者：冯刚[1] 周慧[2] 沈明[2] 陈彪[1] 

机构地区：[1]江苏联合职业技术学院扬州商务分院,江苏扬州225126 [2]扬州大学化学化工学院,江苏扬州225002

出　　处：《西北师范大学学报（自然科学版）》2015年第5期64-69,106,共7页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(21273194);江苏高校优势学科建设工程资助项目

摘　　要：以没食子酸和硝酸铋为原料,通过常压回流法制得了片状没食子酸铋前躯体,再于一定温度下煅烧后得到类片状α-Bi2O3纳米材料.用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、红外光谱(FT-IR)和紫外-可见漫反射光谱(DRS)等手段对样品进行了表征与分析.以制备的纳米α-Bi2O3作为催化剂,研究了其对罗丹明B的可见光催化降解作用.结果表明,在可见光照射下类片状纳米α-Bi2O3具有较好的光催化活性,6h内对罗丹明B的脱色率达到67.73%;而紫外光照射下所制备的纳米α-Bi2O3对罗丹明B具有更好的光催化活性,10min内对罗丹明的脱色率高达95.74%.Using gallic acid and bismuth nitrate as raw materials , bismuth gallate nanosheets are prepared by a simple atmospheric refluxing method and calcined to obtain sheet‐like α‐Bi2 O3 nano‐materials . T he products are characterized and analyzed by scanning electron microscopy （SEM ） , transmission electron microscopy（TEM） ,X‐ray powder diffraction（XRD） ,Fourier transform infrared（FT‐IR）spectroscopy and UV‐Vis diffuse reflectance spectrum （DRS） . Then the above sheets‐likeα‐Bi2 O3 nanomaterials are used as catalysts , and their catalytic activity of photodegradation Rhodamine B is studied under the visible light irradiation and ultraviolet radiation , respectively . The results show that the as‐prepared α‐Bi2 O3 nanomaterials have good decolorization efficiency of Rhodamine B which can reach 67.73% within 6 h under visible light irradiation , and they also have better catalytic activity and the decolorization efficiency of Rhodamine B can reach 95.74% in 10 min under the ultraviolet radiation .

关 键 词：纳米Bi2O3 没食子酸 常压回流法 罗丹明B 光催化作用 

分 类 号：O614.532[理学—无机化学]