Highly active photocatalytic asphalt pavement for NOx removal using iron-doped g-C3N4

• Published in: Road materials and pavement design 2022-11, Vol.23 (11), p.2531-2546
• Main Authors: Shan, Bailin, Cao, Xuejuan, Yang, Xiaoyu, Shang, Ting, Ding, Yongjie, Tang, Boming
• Format: Article
• Language: English
• Subjects: asphalt pavement; Asphalt pavements; Carbon nitride; Crystal structure; Degradation; dispersion spraying; Electronic structure; Energy gap; First principles; Fourier transforms; Infrared spectra; Iron; iron doped g-C; Light diffraction; NO removal efficiency; Pavement construction; Photocatalysis; Photocatalytic material; Photoluminescence; Spraying
• ISSN: 1468-0629; 2164-7402
• DOI: 10.1080/14680629.2021.1984979

Low degradation efficiency limited the application of photocatalytic material in pavement construction. In this study, iron-doped g-C 3 N 4 (Fe-C 3 N 4 ) method was introduced to prepare a high active photocatalyst. The crystal structure and electronic structure of the Fe-C 3 N 4 were calculated by the First Principles. NO removal efficiency was used to evaluate the activity of Fe-C 3 N 4 . The results indicated that the NO removal efficiency was 75.43% when Fe-doped content was 1%. Ultraviolet-Visible (UV-Vis) and Photoluminescence (PL) spectra shows that the Fe doped changed the band structure of g-C 3 N 4 , and reduced the band gap energy, which indicated that Fe-doped could improve the utilisation of visible light. X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectra shows that the Fe doped did not change the crystal structure of g-C 3 N 4 . The NO removal efficiency of three methods was tested. The results indicated that the dispersion spraying method had the best degradation efficiency of 35.8%.