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. 2023 Jul 11;13(30):20584–20597. doi: 10.1039/d2ra07839b

Research literature on TiO2-based building materials to achieve self-cleaning function.

Photocatalyst Building material Preparation method Light source Self-cleaning effect Publication year/literature
FeO-P25 Cement mortar Mixed use of cement mortar (5 wt% P25, 2–4% iron oxide) Ultraviolet RhB is removed by 75% after 18 h 2013 (ref. 69)
P25-SiO2 Dolomite Spray P25 silica sol on the stone surface Ultraviolet Discoloration of methylene blue (70% removed after 72 h) 2012 (ref. 70)
P25-SiO2 Mixed cement slurry (7 wt% P25, 15 wt% silica) Mixed cement slurry (7 wt% P25, 15 wt% silica) Ultraviolet Pyronin Y is removed by 90% after 3.5 h 2014 (ref. 71)
Original commercial P25 Cement sand [ash] slurry Mix with cement mortar (5 wt%) Ultraviolet RhB is removed by 65% after 26 h 2015 (ref. 72)
Ag-SiO2-P25 Stone Spraying silver-modified P25-SiO2 sol on stone surface Ultraviolet Remove 50% of MB after 72 h 2015 (ref. 73)
Original P25 Calcareous calculus Spray P25 sol on the stone surface Sunlight RhB is removed by 90% after 7.5 h 2016 (ref. 74)
P25-Ag Clay brick Spray photocatalyst sol on brick surface Ultraviolet Methylene blue is removed by 45% after 26 h 2016 (ref. 75)
Au-TiO2/SiO2 Kapuli limestone Spray catalyst on the material surface Xenon arc lamp 300–800 nm The removal rate of MB reaches 100% in 90 minutes 2019 (ref. 76)
WO@TiO2 P25 (80% anatase and 20% rutile) The prepared coating precursor is directly sprayed on the substrate and cured at room temperature for 48 h to obtain MWT coating Ultravioletand visible light Decreased by 11.74% and 12.05% respectively under ultraviolet and visible light 2021 (ref. 77)
N-doped TiO2/SWCNT Glass Brush the modified photocatalytic material on the surface of glass material Visible light The highest degradation efficiency of methylene blue is 72.43% 2019 (ref. 78)
TiO2 Concrete Using internal doping method (IDM) and spraying method (SPM) to combine photocatalysis mixed crystal nano-TiO2 particles with concrete Ultraviolet Methyl orange has the maximum photocatalytic degradation efficiency of 73.82%. The photocatalytic degradation efficiency of unpolished nano-TiO2 concrete is much higher than that of polished nano-TiO2 concrete 2020 (ref. 79)
Cu-TiO2/SiO2 Fiberglass reinforced concrete (GFRC) board Cu(i)–TiO2 NPs mixed slurry is prepared by impregnation method, and added to silica oligomer, and the synthetic sol is sprayed on the white concrete surface The photocatalyst containing 5% copper has the highest efficiency, and the maximum damage to methylene blue and soot within 60 min and 168 h of irradiation is 95% and 50% respectively. Higher copper load leads to lower performance 2021 (ref. 80)