The fabrication of a photocatalytic air‐purifying pavement with a facile loading route, long depolluting period, and excellent deNO_x activity under weak solar irradiation is essential for ambient air purification. Herein, a promising methodology is developed relying on the exploitation of a graphitic carbon nitride/TiO₂ (g‐C₃N₄/TiO₂) composite hydrosol at room temperature. The TiO₂ hydrosol can act as a source of photocatalyst and dispersant for g‐C₃N₄ during loading. The photoinduced hydrophilicity, adhesive force, and regeneration tests in the laboratory show the long‐term deNO_x application potential of g‐C₃N₄/TiO₂ coatings. Field studies indicate that the NO removal rate is 70.7% of g‐C₃N₄/TiO₂‐coated pavement in the morning (07:00–10:00) and afternoon (17:00–19:00), at which times solar radiation is weakest. The deNO_x efficiency is influenced by solar irradiation and traffic volume. The latter exerts a more significant influence on deNO_x efficiency than the former. A desirable route in fabricating a photocatalytic air‐purifying pavement is provided and offers a promising photocatalyst suitable for outdoor environmental remediation.

中文翻译：

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g-C3N4 / TiO2复合膜在光催化空气净化路面的制备中

用容易装载路线，长周期消除污染，以及优异的DENO光催化剂的空气净化路面的制造_X活动弱太阳能照射下为环境空气净化必要的。在此，依靠在室温下开发石墨氮化碳/ TiO ₂（g-C ₃ N ₄ / TiO ₂）复合水溶胶，开发了一种有前途的方法。TiO ₂溶胶可以在装载过程中充当g‐C ₃ N ₄的光催化剂和分散剂。光致亲水性，附着力，并在实验室再生试验表明长期DENO _Xg‐C ₃ N ₄ / TiO ₂涂层的应用潜力。现场研究表明，在早上（07：00-10：00）和下午（17：00-19：00），g-C ₃ N ₄ / TiO ₂涂层路面的NO去除率为70.7％。太阳辐射最弱。所述DENO _X效率是由太阳能电池照射和交通量的影响。后者发挥上DENO更显著影响_X效率高于前者。提供了制造光催化空气净化路面的理想途径，并提供了一种有前途的光催化剂，适用于室外环境修复。