scholarly journals Effect of Cu2O Substrate on Photoinduced Hydrophilicity of TiO2 and ZnO Nanocoatings

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1526
Author(s):  
Maria V. Maevskaya ◽  
Aida V. Rudakova ◽  
Alexei V. Emeline ◽  
Detlef W. Bahnemann
Keyword(s):  
Electron Transfer ◽  
Free Energy ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Surface Hydrophilicity ◽  
Hydrophilic Behavior ◽  
Surface Transition ◽  
Photoinduced Hydrophilicity ◽  
Photoinduced Changes

The effect of a Cu2O substrate on the photoinduced alteration of the hydrophilicity of TiO2 and ZnO surfaces was studied. It was demonstrated that the formation of heterostructures Cu2O/TiO2 and Cu2O/ZnO strongly changed the direction of the photoinduced alteration of surface hydrophilicity: while both TiO2 and ZnO demonstrate surface transition to superhydrophilic state under UV irradiation and no significant alteration of the surface hydrophilicity under visible light irradiation, the formation of Cu2O/TiO2 and Cu2O/ZnO heterostructures resulted in photoinduced decay of the surface hydrophilicity caused by both UV and visible light irradiation. All observed photoinduced changes of the surface hydrophilicity were compared and analyzed in terms of photoinduced alteration of the surface free energy and its polar and dispersive components. Alteration of the photoinduced hydrophilic behavior of TiO2 and ZnO surfaces caused by formation of the corresponding heterostructures with Cu2O are explained within the mechanism of electron transfer and increasing of the electron concentration on the TiO2 and ZnO surfaces.

H2 evolution caused by electron transfer between different semiconductors under visible light irradiation

1988 ◽  
Vol 147 (4) ◽  
pp. 401-404 ◽  
Author(s):  
Joji Yoshimura ◽  
Akihiko Kudo ◽  
Akira Tanaka ◽  
Kazunari Domen ◽  
Ken-ichi Maruya ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
H2 Evolution

scholarly journals Crystal-facet-dependent hot-electron transfer in plasmonic-Au/semiconductor heterostructures for efficient solar photocatalysis

2015 ◽  
Vol 3 (29) ◽  
pp. 7538-7542 ◽  
Author(s):  
Guigao Liu ◽  
Tao Wang ◽  
Wei Zhou ◽  
Xianguang Meng ◽  
Huabin Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Au Nanoparticles ◽  
Semiconductor Heterostructures ◽  
Light Irradiation ◽  
Hot Electron ◽  
Semiconductor Crystal ◽  
Crystal Facet ◽  
Hot Electron Transfer

Semiconductor crystal facets are found to have significant effects on hot-electron transfer from Au nanoparticles to the semiconductor within plasmonic photocatalysts under visible-light irradiation, leading to facet-dependent photocatalysis.

[Cr(ttpy)2]3+ as a multi-electron reservoir for photoinduced charge accumulation

2019 ◽  
Vol 48 (20) ◽  
pp. 6800-6811 ◽  
Author(s):  
Rajaa Farran ◽  
Long Le-Quang ◽  
Jean-Marie Mouesca ◽  
Vincent Maurel ◽  
Damien Jouvenot ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Tertiary Amine ◽  
Visible Light Irradiation ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Light Irradiation ◽  
Charge Accumulation ◽  
Photoinduced Charge

Under visible light irradiation [Cr(ttpy)2]3+ can be reduced twice by a tertiary amine; the photoreduction processes are accelerated in the presence of [Ru(bpy)3]2+ acting as an antenna thanks to an efficient electron transfer reaction from [Ru(bpy)3]2+* to [Cr(ttpy)2]3+.

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