{
  "abstract": "Titanium dioxide (TiO 2 ) based photocatalytic pavements are a promising technology for lowering nitrogen oxide (NO x ) concentrations close to traffic. This review synthesises laboratory and field evidence on TiO 2 -based pavements and maps the research landscape. Bibliometric analysis (2010-2025) shows that annual research output has risen steadily. China and the United States lead productivity, and 'NO x ', 'nano-TiO 2 ' and 'asphalt pavement' form the current keyword frontier, whereas 'visible light', 'heterojunction' and 'selectivity' are still emerging themes. TiO 2 incorporation methods, direct, indirect, and surface application, were scrutinized for their photocatalytic efficiency. Direct mixing dilutes and encapsulates the catalyst: at equal loading, asphalt matrices remove roughly 100 times less NO x than cement mortar. Carrier-based indirect routes and surface coatings restore activity, and surface-mounted TiO 2 aggregates achieve higher abatement with about seven times less TiO 2 , but coatings can lose most of their activity within 2-6 months under traffic. Humidity, flow rate, inlet concentration, temperature and irradiance govern performance, and cementitious substrates outperform bituminous ones. Credible field reductions cluster between 5 and 20% for roads and 10-25% for illuminated tunnels, with single-digit effects the norm under overcast, humid or soiled conditions. Durability rather than peak reactivity must therefore become the yardstick, and a four-metric readiness framework (FEP, MISB, EIRP, TELV) with measurable thresholds is proposed to enable standardised, whole-system evaluation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Ali Zain Ul Abadeen"
    },
    {
      "name": "Cedric Vuye"
    },
    {
      "name": "Sammy Verbruggen"
    },
    {
      "name": "Manolis Romanias"
    },
    {
      "name": "Seyed Reza Omranian"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/arjmf6xxhzw1h.bib",
  "cited_by": 0,
  "doi": "10.1016/j.jcbmtr.2026.100026",
  "fulltext_url": null,
  "id": "arjmf6xxhzw1h",
  "issns": [
    "3117-650X",
    "3117-650X"
  ],
  "landing_url": "https://hal.science/hal-05779766v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sde"
    ],
    [
      "openalex",
      "2105|TiO2 Photocatalysis and Solar Cells"
    ]
  ],
  "openalex": "W7219055109",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/arjmf6xxhzw1h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:48Z",
      "native_id": "hal-05779766",
      "source": "hal",
      "url": "https://hal.science/hal-05779766v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
    }
  ],
  "title": "Progress in TiO2-based photocatalytic pavements for urban NOₓ mitigation: A comprehensive review",
  "title_text": "Progress in TiO2-based photocatalytic pavements for urban NOₓ mitigation: A comprehensive review",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:48Z",
  "url": "https://research.draconitic.com/paper/arjmf6xxhzw1h",
  "venue": "Construction and Building Materials in Transportation",
  "versions": []
}