Photooxidation Reaction of Water on ann-TiO2Electrode

1997 ◽  
pp. 297-309 ◽  
Author(s):  
Y. Magari ◽  
H. Ochi ◽  
S. Yae ◽  
Y. Nakato
Keyword(s):  
Photooxidation Reaction

scholarly journals Photooxidation Reaction of Naphthaldehyde

1973 ◽  
Vol 93 (7) ◽  
pp. 910-915 ◽  
Author(s):  
AKIRA HATANO ◽  
RIYOICHI HATANO
Keyword(s):  
Photooxidation Reaction

Preparation of copper complexes coordinated by N21,N22-etheno bridged porphyrin and the application to photooxidation of phenol derivatives

2015 ◽  
Vol 19 (06) ◽  
pp. 786-793 ◽  
Author(s):  
Yuko Takao ◽  
Fukashi Matsumoto ◽  
Kazuyuki Moriwaki ◽  
Takumi Mizuno ◽  
Toshinobu Ohno ◽  
...  
Keyword(s):  
Copper Complexes ◽  
Reaction System ◽  
Aerobic Condition ◽  
Active Species ◽  
Organic Solution ◽  
Phenol Derivative ◽  
Phenol Derivatives ◽  
Porphyrin Ligand ◽  
Copper Porphyrin ◽  
Photooxidation Reaction

Copper(I) complexes coordinated with a N21,N22-etheno bridged porphyrin ligand were synthesized as a unique coordination structure. The copper porphyrin complexes promoted photooxidations of a phenol derivative in organic solution under aerobic condition with visible photoirradiation. The complexes could be immobilized on silica gel as a support and the obtained copper porphyrin composites showed high ability as photocatalysts for heterogeneous photooxidation of a phenol derivative in aqueous solution. The composites could be easily recovered and re-used after the reaction. The structural study found that the active species contributing to the photooxidation reaction was the di(μ-hydroxo)dicopper(II) complex of N21,N22-etheno bridged porphyrin generated by oxidation of corresponding copper(I) complex in the reaction system under homogeneous and heterogeneous condition.

Synthesis, photophysical properties and photocatalytic activity of tungsten porphyrin (TPPWCl4)

2013 ◽  
Vol 17 (06n07) ◽  
pp. 460-472 ◽  
Author(s):  
Rodica-Mariana Ion
Keyword(s):  
Mass Spectrometry ◽  
Photocatalytic Activity ◽  
Quantum Yield ◽  
Photophysical Properties ◽  
Chemical Properties ◽  
Analytical Techniques ◽  
Solid Substrates ◽  
Reaction Processes ◽  
Photooxidation Reaction

Although tungsten porphyrins are known as mimicking models in biology, only a few papers about its chemical properties have been reported, the rarity of studies being attributed to the difficulties encountered in their synthesis due to their low stability. In this paper 5,10,15,20-tetra-p-phenyl-porphyrin tungsten(VI) chlorine (TPPWCl4) was studied, this metallo-porphyrin characterized by different analytical techniques: UV-vis, FTIR, ESR, mass spectrometry, including photophysical determination of its singlet oxygen quantum yield, too. Its photodegradation reaction with the mechanism and species involved into this destruction reaction processes is discussed, too. Also, in order to maintain its photostability, TPPWCl4has been incorporated into solid substrates, such as ZnO and TiO2, and these composites were subsequently tested in the photooxidation reaction of isoamylenes (2-methyl-2-butene and 2-methyl-1-butene mixture).

Photodissolution of iron oxides. IV. A comparative study on the photodissolution of hematite, magnetite, and maghemite in EDTA media

1992 ◽  
Vol 70 (9) ◽  
pp. 2502-2510 ◽  
Author(s):  
Marta I. Litter ◽  
Miguel A. Blesa
Keyword(s):  
Reaction Rates ◽  
Thermal Reaction ◽  
Oxidation Products ◽  
Experimental Conditions ◽  
Spinel Type ◽  
Long Term Stability ◽  
Initiation Step ◽  
Edta Complexes ◽  
Photooxidation Reaction

The thermal and 254-nm photochemical dissolution reactions of magnetite (Fe3O4), maghemite (γ-Fe2O3), and hematite (α-Fe2O3) suspended in EDTA aqueous solutions were compared. γ-Fe2O3 and Fe3O4 are thermally and photochemically more reactive than α-Fe2O3. Both thermal and photochemical dissolution reactions are governed by an initiation step, which involves the production of FeIIaq, and a subsequent thermal reaction of these ions with the solid, to produce FeIIIaq. The initiation step under UV irradiation involves the photoreduction of surface >FeIII – EDTA complexes to yield FeIIaq and the photooxidation of adsorbed EDTA to yield CH2O and other oxidation products. After FeIII – EDTA complexes build up in solution through the following step, homogeneous photolysis is the main source of FeII and CH2O. Oxides with spinel type structure are characterized by faster rates in the two processes, and O2 may inhibit the dissolution processes by changing the stoichiometry of the initiation step to that of the autooxidation of EDTA. The relative importance of autooxidation and photodissolution depends on the nature of the oxide and the experimental conditions. Photooxidation reaction rates parallel those of the photodissolution initiation steps, and long-term stability towards photocorrosion (dissolution) implies low photocatalytic activity for the oxidation of EDTA. The set of differential equations describing all the reaction rates is discussed and applied to the different cases.

One-step calcination preparation of worm-like ZnO@BiOI heterojunction with enhanced visible light response for mild photooxidation reaction

2018 ◽  
Vol 217 ◽  
pp. 296-299 ◽  
Author(s):  
Zhifang Tong ◽  
Lingling He ◽  
Chunguang Ren ◽  
Zhonghua Wang ◽  
Zonglin Jiang
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Visible Light Response ◽  
One Step ◽  
Photooxidation Reaction

Synthesis of the active stilbenoids by photooxidation reaction of trans-ϵ-viniferin

2010 ◽  
Vol 22 (11) ◽  
pp. 1350-1355 ◽  
Author(s):  
Chun-Suo Yao ◽  
Mao Lin ◽  
Ying-Hong Wang
Keyword(s):  
Photooxidation Reaction

Effect of backbone structures of polysilanes on the photooxidation reaction

Polymer ◽  
1996 ◽  
Vol 37 (19) ◽  
pp. 4327-4331 ◽  
Author(s):  
Keiji Kabeta ◽  
Kiyoaki Shuto ◽  
Shin-ichiro Sugi ◽  
Takafumi Imai
Keyword(s):  
Photooxidation Reaction
Sign in / Sign up

Export Citation Format

Share Document