Pt/N Co-doped Titanium Dioxide Visible-Light-Active Photo-catalyst: Preparation and Characterization

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Wang, Yan^1,2 ; Zhang, Yungeng^2 ; Li, Peichen^2

Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng

475004, China^1

Department of Scientific Research, Henan University, Kaifeng

475004, China^2

关键词: Hydrothermal methods;    Photocatalytic activities;    Photocatalytic property;    Photogenerated electrons;    Synergistic effect;    Visible light active photocatalysts;    Visible-light irradiation;    Visible-light response;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012022/pdf
DOI  :  10.1088/1755-1315/81/1/012022

来源: IOP

【 摘 要 】

Platinum and nitrogen co-doped TiO2 (denoted as Pt/TiO2-xNx) visible-light-active photocatalysts were prepared via hydrothermal method using nanotubular titanic acid (denonted as NTA) as precursor. The prepared Pt/TiO2-xNx samples displayed a better photocatalytic activity toward the oxidation of propylene than P25 under visible light irradiation. It is suggested that a fresh sub-band nearby the conduction band was induced due to the formation of single-electron-trapped oxygen vacancies, resulting in the visible light response of Pt/TiO2-xNx sample. Dopants nitrogen or platinum play an important role in separating photogenerated electrons and holes. The synergistic effect between oxygen vacancies and nitrogen as well as platinum is responsible for the enhanced photocatalytic property.