Visible-Light-Induced Redox Reactions by Ruthenium Photoredox Catalyst

2014 ◽  
pp. 371-395 ◽  
Author(s):  
Takashi Koike ◽  
Munetaka Akita
Keyword(s):  
Visible Light ◽  
Redox Reactions

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Construction of two-dimensionally relative p-n heterojunction for efficient photocatalytic redox reactions under visible light

2020 ◽  
Vol 505 ◽  
pp. 144638 ◽  
Author(s):  
Huihui Wu ◽  
Sugang Meng ◽  
Jinfeng Zhang ◽  
Xiuzhen Zheng ◽  
YaXiao Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Redox Reactions

M@MIL-100(Fe) (M = Au, Pd, Pt) nanocomposites fabricated by a facile photodeposition process: Efficient visible-light photocatalysts for redox reactions in water

Nano Research ◽  
2015 ◽  
Vol 8 (10) ◽  
pp. 3237-3249 ◽  
Author(s):  
Ruowen Liang ◽  
Fenfen Jing ◽  
Lijuan Shen ◽  
Na Qin ◽  
Ling Wu
Keyword(s):  
Visible Light ◽  
Redox Reactions

Introducing a protective interlayer of TiO2 in Cu2O–CuO heterojunction thin film as a highly stable visible light photocathode

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 5231-5236 ◽  
Author(s):  
Peng Wang ◽  
Xiaoming Wen ◽  
Rose Amal ◽  
Yun Hau Ng
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Charge Transfer ◽  
Visible Light ◽  
Redox Reactions ◽  
Electrolyte Interface

Photoactivity and stability of Cu2O–CuO heterojunction thin films are enhanced by incorporating an interlayer of TiO2. The thin TiO2 layer minimises the redox reactions at Cu2O–electrolyte interface and facilitates charge transfer from Cu2O to CuO.

Photocatalytic activity of Hemin (Fe(iii) porphyrin) anchored BaTiO3 under the illumination of visible light: synergetic effects of photosensitization, photo-Fenton & photocatalysis processes

2018 ◽  
Vol 5 (1) ◽  
pp. 127-138 ◽  
Author(s):  
L. Gomathi Devi ◽  
P. M. Nithya
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Synergetic Effect ◽  
Photocatalytic Efficiency ◽  
Synergetic Effects

The robust photocatalytic efficiency of hemin anchored BaTiO3 is due to the synergetic effect among photosensitization, reactive 1O2 and redox reactions involving Fe2+/Fe3+.

scholarly journals Rhodium-doped titania photocatalysts with two-step bandgap excitation by visible light—influence of the dopant concentration on photosensitization efficiency

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77201-77211 ◽  
Author(s):  
J. Kuncewicz ◽  
B. Ohtani
Keyword(s):  
Visible Light ◽  
Valence Band ◽  
Conduction Band ◽  
Redox Reactions ◽  
Dopant Concentration ◽  
Low Concentration ◽  
Doped Titania

Visible light-induced redox reactions of low-concentration rhodium-introduced titania proceeded through two photoexcitation of rhodium(iii) to the conduction band of titania and an electron in the valence band to thus-generated rhodium(iv).

scholarly journals ZnO/VNC Material for UV-Photodegradation of Methylene Blue

2016 ◽  
Vol 67 ◽  
pp. 65-71
Author(s):  
A. Arunkumar ◽  
T. Chandrasekaran ◽  
K. Riaz Ahamed
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Redox Reactions ◽  
Chemical Activation ◽  
Degradation Study ◽  
Photo Catalysis ◽  
Uv Photodegradation ◽  
Ft Ir ◽  
Uv Visible ◽  
Catalysis Efficiency

ZnO materials act as a Photocatalytic reaction and it leads to partial or complete mineralization or decolorization of organic pollutants. Upon irradiation with UV/visible light, semiconductors catalyze undergoes redox reactions in presence of air/O2and water. In the present study Zinc oxide (ZnO) was doped with activated carbon prepared from the stem of the plant material by chemical activation namely,Vitexnegundostemcarbon (VNC). The decolourisation and degradation study of a dye namely, methylene blue (MB) was carried out to find out the efficiency of catalytic property of ZnO/VNC. The reaction was performed at 20, 40, 60 ppm of dye solution with ZnO/VNC material at 10 min interval of time. It found that the prepared ZnO / VNC composite exhibits an enhanced Photocatalytic activity for MB degradation under visible light irradiation and its photo catalysis efficiency was analyzed in specific 663 nm λ max using a UV–vis-spectrophotometer. The surface morphology and functional group present in the ZnO / VNC material was characterized by using FT-IR, SEM and XRD. The result reveals that the ZnO/VNC structure consists of irregular aggregates with rough surfaces and high photodegradation activities of ZnO/VNC on MB solutions are found to be at 20ppm. The ZnO/VNC may be used as an alternative adsorbent to remove MB from aqueous solutions.Keywords: Methylene blue (MB), ZnO / VNC, FT-IR, SEM, XRD

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