Author(s): Wu, ZJ (Wu, Zhengjie); Zhao, YH (Zhao, Youhai); Chen, X (Chen, Xiong); Guo, YX (Guo, Yongxiang); Wang, HW (Wang, Haiwang); Jin, YR (Jin, Yaran); He, P (He, Ping); Wei, QQ (Wei, Qingquan); Wang, BZ (Wang, Bingzhu)

Source: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS Volume: 164 Article Number: 110629 DOI: 10.1016/j.jpcs.2022.110629 Published: MAY 2022

Abstract: In this paper, a method for preparing polymeric carbon nitride/TiO2 (PCN/TiO2) with NH4Cl as template is proposed. Comparing with PCN prepared with conventional methods, the specific surface area of PCN/TiO2 is higher, which also improves the photocatalytic performance. The structure and evolution of samples were explored via FT-IR, XRD, SEM, TEM, BET and XPS in order to analyze the reaction mechanism of PCN/TiO2. In the meantime, the electron-hole separation efficiency and energy band structure were explored by PL and UV-Vis spectra. In addition, the RhB degradation mechanism and electrons-holes transport path of PCN/TiO(2 )was analyzed by degradation experiments and EPR. The results show that the NH4Cl which is the template was decomposed after calcination, therefore PCN showed the porous morphology. The compound of PCN and TiO2 formed heterojunction, which can effectively promote the electron-hole separation rate to improve the photo catalytic efficiency. The PCN/TiO2(2.5:1) was found to have the best dye degradation efficiency and the degradation rate of RhB could reach 83.81% within 150 min. During the degradation of RhB, the active substances are h+, center dot & nbsp;OH and center dot & nbsp;O-2(-) and the mechanism of electron-hole transmission is Type-Z transport mechanism.

Accession Number: WOS:000777830500002

ISSN: 0022-3697

eISSN: 1879-2553

Full Text: https://www.sciencedirect.com/science/article/pii/S0022369722000579?via%3Dihub