Photocatalytic degradation of vehicular exhaust by nitrogen-doped titanium dioxide modified pavement material

The increasing number of motor vehicles on roads is correspondingly augmenting obnoxious aerial exhaust pollution. Herein, this study reports the introduction of nitrogen-doped titanium dioxide (N-TiO₂) as new pavement materials with enhanced photocatalytic degradation efficiency for vehicular exhaust. The structure and bandgap of the prepared N-TiO₂ were simulated in Cambridge sequential total energy package (CASTEP) and verified by microscopic experiments (X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscope, Ultraviolet (UV)–visible diffuse reflectance spectra). Meanwhile, this study evaluated its photocatalytic degradation efficiency in tests using carbon monoxide (CO) and nitrogen oxide (NO) as model exhaust fumes with various operating parameters optimized. In the end, the suitability of photocatalytic exhaust gas degradation fog sealing technique was compared to three pavement grades (stone mastic asphalt-13, asphalt concrete-13, and open-graded friction course-13), and the results showed that the N-TiO₂ is more suitable for stone mastic asphalt pavement.


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  • Accession Number: 01766242
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 7 2021 3:43PM