Diclofenac degradation properties of a La-doped visible light-responsive TiO2 photocatalyst

2022 ◽  
Vol 25 ◽  
pp. 100564
Author(s):  
Heon Lee ◽  
Jaegu Park ◽  
Su Shiung Lam ◽  
Young-Kwon Park ◽  
Sang-Chai Kim ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Photocatalyst ◽  
Degradation Properties ◽  
La Doped

scholarly journals Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO2 Mesoporous Semiconductor under Visible Light

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 529
Author(s):  
Adilah Sirivallop ◽  
Salvador Escobedo ◽  
Thanita Areerob ◽  
Hugo de Lasa ◽  
Siriluk Chiarakorn
Keyword(s):  
Visible Light ◽  
Solvothermal Method ◽  
Methanol Conversion ◽  
Quantum Yields ◽  
Tio2 Photocatalyst ◽  
Silver Surface ◽  
Technical Literature ◽  
Volatile Organic ◽  
Irradiation Period ◽  
Particle Agglomerate

This research studies the photocatalytic conversion of methanol (25–90 µmol/L range) as a volatile organic compound (VOC) surrogate into CO2, using a N/Ag/TiO2 photocatalyst under visible light irradiation in a Photo-CREC Air unit. The N/Ag/TiO2 mesh supported photocatalyst is prepared via the solvothermal method. While the bare-TiO2 is inactive under visible light, the N/Ag/TiO2 2 wt.% loaded stainless-steel woven mesh displays 35% quantum yields, with 80% absorbed photons and 60% methanol conversion in a 110 min irradiation period. Results obtained are assigned to silver surface plasmon resonance, silver and nitrogen species synergistic impacts on band gap, and their influence on particle agglomerate size and semiconductor acidity. The determined quantum yields under visible light in a Photo-CREC Air unit, are the highest reported in the technical literature, that these authors are aware of, with this opening unique opportunity for the use of visible light for the purification of air from VOC contaminants.

scholarly journals Antiviral Effect of Visible Light-Sensitive CuxO/TiO2 Photocatalyst

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1093
Author(s):  
Masahiro Miyauchi ◽  
Kayano Sunada ◽  
Kazuhito Hashimoto
Keyword(s):  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Antiviral Effect ◽  
Light Illumination ◽  
Tio2 Photocatalyst ◽  
Valence States ◽  
Antiviral Function ◽  
Dark Conditions ◽  
Indoor Conditions ◽  
Interfacial Charge

Photocatalysis is an effective technology for preventing the spread of pandemic-scale viruses. This review paper presents an overview of the recent progress in the development of an efficient visible light-sensitive photocatalyst, i.e., a copper oxide nanoclusters grafted titanium dioxide (CuxO/TiO2). The antiviral CuxO/TiO2 photocatalyst is functionalised by a different mechanism in addition to the photocatalytic oxidation process. The CuxO nanocluster consists of the valence states of Cu(I) and Cu(II); herein, the Cu(I) species denaturalizes the protein of the virus, thereby resulting in significant antiviral properties even under dark conditions. Moreover, the Cu(II) species in the CuxO nanocluster serves as an electron acceptor through photo-induced interfacial charge transfer, which leads to the formation of an anti-virus Cu(I) species and holes with strong oxidation power in the valence band of TiO2 under visible-light irradiation. The antiviral function of the CuxO/TiO2 photocatalyst is maintained under indoor conditions, where light illumination is enabled during the day but not during the night; this is because the remaining active Cu(I) species works under dark conditions. The CuxO/TiO2 photocatalyst can thus be used to reduce the risk of virus infection by acting as an antiviral coating material.

Enhancement of the photocatalytic performance of Ag-modified TiO2 photocatalyst under visible light

2012 ◽  
Vol 38 (6) ◽  
pp. 5201-5207 ◽  
Author(s):  
Cheewita Suwanchawalit ◽  
Sumpun Wongnawa ◽  
Pimpaporn Sriprang ◽  
Pachara Meanha
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Tio2 Photocatalyst
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