纳米BiVO_4的微波合成及其光催化性质  

Microwave Synthesis and Photocatalytic Activity of the BiVO_4 Nanocrystalline

作　　者：廖学红[1] 夏丽星[1] 

机构地区：[1]黄冈师范学院化学与生命科学学院经济林木种质改良与资源综合利用湖北省重点实验室,湖北黄冈438000

出　　处：《微纳电子技术》2011年第7期437-442,共6页Micronanoelectronic Technology

基　　金：湖北省教育厅自然科学项目重点基金(D200627001);黄冈师范学院功能材料研究学术创新团队基金项目(tdxkjs0301)

摘　　要：以五水硝酸铋和五氧化二钒为原料,通过微波合成法制备了纳米BiVO4,采用X-射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)表征了样品的形貌、结构和特性。XRD表明所制备的样品是纯的单斜晶型BiVO4;SEM显示样品的形貌呈层状结构;TEM进一步指出这些片层结构是由小粒子聚集而成的多孔结构。以催化降解甲基橙来考察其光催化性能。在100mL的10mg/L甲基橙溶液中加入0.12g经673K恒温热处理2h后的BiVO4及0.2mL H2O2,调节pH值为3.0,在可见光下照射90min后,降解率达到94.70%,催化性能良好。The BiVO4 nanocrystalline was prepared with the bismuth nitrate pentahydrate and vanadium oxide as raw materials by microwave synthesis.The morphology,structure and properties of the product were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The XRD result indicates that the prepared sample is pure monoclinic-type BiVO4,the SEM result shows that the morphology of the prepared sample is flake,and the TEM result further exhibits that the flake is porous structure composed of the aggregation grains.The photocatalytic activity of the prepared sample was investigated by the degradation of the methyl orange.The 0.12 g BiVO4 heat treated 2 h at the constant temperature of 673 K and 0.2 mL H2O2 were added in 100 mL 10 mg/L methyl orange solution with the pH of 3.0.After the mixed solution was put in the visible light for 90 min,the degradation rate reached 94.70%.Hence the catalytic performance is excellent.

关 键 词：纳米BiVO4 微波合成 光催化 可见光 降解 甲基橙 

分 类 号：TB383[一般工业技术—材料科学与工程] O614.51[理学—无机化学]