The preparation of nitrogen-doped TiO_2 nanocrystals with exposed {001} facets and their visible-light photocatalytic performances  

作　　者：Huiying Ai Jianwen Shi Jianwei Chen Minglai Fu 

机构地区：[1]Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2014年第18期2199-2207,共9页

基　　金：supported by the Key Project of Science and Technology Plan of Fujian Province (2012Y0066);the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201107SIC);the National High Technology Research and Development Program of China (2012AA062606);the International Science & Technology Cooperation Program of China (2011DFB91710);the Xiamen Distinguished Young Scholar Award (3502Z20126011)

摘　　要：Anatase TiO2with exposed{001}facets has been deepgoingly studied for optimizing its photocatalytic activity.In this study,we synthesized N-doped TiO2 nanocrystals with exposed{001}facets by sol–gel method and solvothermal method,respectively.The physical and chemical properties of as-synthesized samples,such as morphology,crystal phase,surface elements composition,porous structure,specific surface area,and optical response,were characterized in detail.The photocatalytic performances of all samples were evaluated by photocatalytic decoloration of methylene blue under visible-light irradiation(k[420 nm).The results showed that the as-prepared samples present high visible-light photocatalytic performances,which can be ascribed to the excellent crystallization,the enhancement of absorbance in the visible-light region,and the strong adsorption performance,and calcination treatment is helpful to further improve the visible-light photocatalytic performance of N-doped TiO2 nanocrystals with exposed{001}facets.Anatase TiO2 with exposed {001} facets has been deepgoingly studied for optimizing its photocatalytic activity. In this study, we synthesized N-doped TiO2 nano- crystals with exposed {001} facets by sol-gel method and solvothermal method, respectively. The physical and chemi- cal properties of as-synthesized samples, such as morphology, crystal phase, surface elements composition, porous structure, specific surface area, and optical response, were characterized in detail. The photocatalytic performances of all samples were evaluated by photocatalytic decoloration of methylene blue under visible-light irradiation （2 〉 420 nm）. The results showed that the as-prepared samples present high visible-light photocatalytic performances, which can be ascribed to the excellent crystallization, the enhancement of absorbance in the visible-light region, and the strong adsorption perfor- mance, and calcination treatment is helpful to further improve the visible-light photocatalytic performance of N-doped TiO2 nanocrystals with exposed {001 } facets.

关 键 词：TIO2纳米晶 光催化性能 可见光照射 氮掺杂 晶面 晶带 比表面积 光催化活性 

分 类 号：O643.32[理学—物理化学]