Preparation and enhanced photocatalytic performance of N-TiO_(2)/g-C_(3)N_(4)heterostructure for Rhodamine B degradation  

作　　者：Xiao-xia Lin Jie-sheng Wu Qi Shi Wei-xia Gu 

机构地区：[1]School of Material Engineering,Jinling Institute of Technology,Nanjing 211169,China

出　　处：《Water Science and Engineering》2024年第4期371-377,共7页水科学与水工程(英文版)

基　　金：supported by the Funding Program of College Student's Innovative and Entrepreneurial Abilities in Jiangsu(Grant No.202213573114H);the Project of Modern Educational Technology in Jiangsu(Grant No.2022-R-100618);the Project of Research on School Level Educational Reform of Jinling Institute of Technology(Grant No.JYJG202137).

摘　　要：Highly efficient photocatalysts have been developed for the degradation of contaminated water under visible light.In this study,N-doped TiO_(2)(N-TiO_(2))and metal-free graphitic carbon nitride(g-C_(3)N_(4))composites with various Ti/C molar ratios were prepared with the simple mixing-calcining method.The samples were characterized by X-ray diffraction,scanning electron microscopy,ultraviolet–visible diffuse reflectance spectroscopy,and photoluminescence spectroscopy.The photocatalytic activity of N-TiO_(2)/g-C_(3)N_(4)in the degradation of Rhodamine B(RhB)was investigated,and the electrochemical method was used to determine the origin of the enhanced photoactivity of N-TiO_(2)/g-C_(3)N_(4).The results showed that N-TiO_(2)nanoparticles were dispersed on the surface of g-C_(3)N_(4)and formed a stable heterojunction structure with g-C_(3)N_(4).The heterojunction between the two semiconductors could effectively prevent the recombination of photogenerated electrons and holes and improve the photocatalytic efficiency of the photocatalyst under visible light irradiation.The photocatalyst exhibited high stability,and the RhB degradation rate was still higher than 82.3%after five cycles.

关 键 词：N-DOPING g-C_(3)N_(4) HETEROJUNCTION Visible light Photocatalytic performance 

分 类 号：O64[理学—物理化学]