简捷微波化学制备BiOBr纳米片及可见光催化性能  

Facile Microwave-assisted Aqueous Chemical Synthesis of BiOBr Nanosheets Displaying Highly Efficient Photocatalytic Activities under Visible Light

作　　者：丁爱琴[1] 魏良琴 方秀敏[2] 

机构地区：[1]合肥学院基础教学与实验中心,合肥230601 [2]合肥学院化学与材料工程系,合肥230601

出　　处：《合肥学院学报（自然科学版）》2014年第2期81-83,96,共4页Journal of Hefei University :Natural Sciences

基　　金：2013年安徽省大学生创新计划基金资助

摘　　要：以Bi（NO3）3·5H2O和NaBr为原料,水为溶剂,通过一步微波加热过程制得了BiOBr纳米片.粉体的XRD分析为纯的四方相BiOBr,结晶性好;FESEM照片显示样品为单分散的四边形纳米片,边长为200～300nm、厚度约为25nm;固体紫外可见吸收光谱（UV-Vis DRS）测试表明粉体的吸收带边延伸到可见光区,计算其能隙带宽为2.63eV.可见光催化降解有机染料罗丹明B（RhB）的实验表明：在LED可见光辐照下,100mg催化剂在45min内可将100mL、10mg/mL的RhB溶液完全降解.BiOBr nanosheets have been synthesized via a one- pot and green microwave- assisted heating proceeding,using Bi（ NO3）3·5H2O and NaBr as raw materials,and distilled water as solvent. The products have been characterized by XRD,FESEM and Uv- Vis diffuse reflectance spectra（ DRS）. The results show that as- prepared BiOBr nanosheets with high crystallinity possess a pure tetragonal phase. The quadrangular nanosheet has the length of side in the range from 200 to 300 nm,as well as the average thickness of about 25 nm,respectively. The band gap energy of as-obtained product is calculated to be 2. 63 eV observed from Uv- Vis DRS,showing a characterization of visible light absorbance. According to the photodegradation of Rhodamine B under visible lighting,the BiOBr nanosheets exhibit highly efficient photocatalytic activity,in which 100mL（ 10 mg / mL） RhB solution could be drastically degraded within 45 min with the help of 100 mg BiOBr catalyst under LED lamp irradiation.

关 键 词：BiOBr 微波化学 光催化剂 可见光 

分 类 号：O614[理学—无机化学]