g-C3N4/TiO2 Composite Film in the Fabrication of a Photocatalytic Air-Purifying Pavements
Corresponding Author
Yu Huang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Center of Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, 710061 Xi'an, Shaanxi, China
Search for more papers by this authorJing Zhang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorZhenyu Wang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorYan Liu
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorPengge Wang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorJun-ji Cao
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Center of Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, 710061 Xi'an, Shaanxi, China
Search for more papers by this authorCorresponding Author
Wingkei Ho
Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong, China
Search for more papers by this authorCorresponding Author
Yu Huang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Center of Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, 710061 Xi'an, Shaanxi, China
Search for more papers by this authorJing Zhang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorZhenyu Wang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorYan Liu
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorPengge Wang
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Search for more papers by this authorJun-ji Cao
State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061 China
Center of Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, 710061 Xi'an, Shaanxi, China
Search for more papers by this authorCorresponding Author
Wingkei Ho
Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong, China
Search for more papers by this authorAbstract
The fabrication of a photocatalytic air-purifying pavement with a facile loading route, long depolluting period, and excellent deNOx 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 deNOx 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 deNOx efficiency is influenced by solar irradiation and traffic volume. The latter exerts a more significant influence on deNOx 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.
Conflict of Interest
The authors declare no conflict of interest.
Supporting Information
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