Liquid phase photooxidation of alcohol over niobium oxide without solvents

Ohuchi, Tai; Miyatake, Toshiaki; Hitomi, Yutaka; Tanaka, Tsunehiro

doi:10.1016/j.cattod.2006.07.044

Cited by 63 publications

(53 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6] Niobium oxides are particularly important because of their structural diversity and applications as a catalyst support. 2 There is evidence that niobium oxides are good catalytic promoters.…”

Section: Introductionmentioning

confidence: 99%

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

et al. 2010

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Recently, we found the photo-oxidation of alcohols to carbonyl compounds selectively proceeds over Nb 2 O 5 at low temperature without organic solvents and without any additives [75][76][77][78]. Various metal oxides (SiO 2 , MgO, Al 2 O 3 , ZrO 2 , V 2 O 5 , Ta 2 O 5 , MoO 3 , and WO 3 ) showed no activity and the activity of ZnO was very low.…”

Section: Photo-oxidation Of Alcohols and Amines With Molecular Oxygenmentioning

confidence: 97%

“…On the basis of these results, we proposed the reaction mechanism of photo-oxidation of alcohol on Nb 2 O 5 (Scheme 4) [75][76][77]; (1) alcohol is adsorbed on Nb 2 O 5 to form alkoxide species, (2) the photo-formed electron is trapped on Nb 5? to form Nb 4?…”

Section: Mechanism Of Photo-oxidation Of Alcohols On Nb 2 Omentioning

confidence: 98%

Photo-Induced Electron Transfer Between a Reactant Molecule and Semiconductor Photocatalyst: In Situ Doping

2011

Self Cite

View full text Add to dashboard Cite

The possibility of the direct electron transition between the donor/acceptor level generated by adsorbed molecules and the conduction/valence band for photoilluminated semiconductor-type metal oxide is discussed. The effective wavelength is shifted to a longer wavelength by the formation of donor/acceptor level derived from adsorbed molecule (called here ''in situ doping''). This photo-activation mechanism by ''in situ doping'' gives us attractive ways for the removing the limit of band-gap energy, and the utilization of visible light.

show abstract

“…Unlike in photocatalytic synthesis (Ohuchi et al 2007), the presence of water as a source of hydroxyl radical is an essential initial step that leads to photocatalytic degradation. Either water molecule, terminal oxygen ( > O (Imoberdorf et al 2005;Haick and Paz 2003) respectively.…”

Section: Ohmentioning

confidence: 99%

“…Generally, the primary reactions that may take place en route photocatalytic reactions depend upon the chemical nature of the substrate and the reaction condition. Basically for the purpose of effective photocatalytic synthesis, oxidations are carried out in presence of partially hydrated (Fox et al 1989) or neat solvent (Ohuchi et al 2007). A vast majority of the photosynthesis reactions that take place on the surface of semiconductor photocatalyst are characterised by positive G o which means therefore they are thermodynamically favourable.…”

Section: Photocatalytic Processesmentioning

confidence: 99%

Principles of Heterogeneous Photocatalysis

Gaya

2013

Heterogeneous Photocatalysis Using Inorganic Semiconductor Solids

View full text Add to dashboard Cite

At the turn of 1970s, the photo-response of solid materials became a constant subject of intensive research for possible application in modern technologies. Heterogeneous photocatalysis has evolved in a unique way giving rise to various applications for alternative energy, organic synthesis and environmental treatment. Semiconducting compounds have thrived as the most suitable materials for these applications. Towards achieving the maximum potential benefits of semiconductor photocatalysis and to make remarkable impact, the fundamental concept as well as application has been extensively and rigorouslyexplored. We therefore detail herein the basic formalism of semiconductor photocatalysis from band models through the generation of oxidants to the light harvesting processes. The key imperfections in semiconductor oxides and their consequences on the extrinsic semiconductivity are outlined. The advances being made regarding the role of oxidising species in photocatalytic degradation are rationally discussed. Finally, the reader is referred to some 'must read' articles in heterogeneous photocatalysis by semiconductor solids.

show abstract

Liquid phase photooxidation of alcohol over niobium oxide without solvents

Cited by 63 publications

References 27 publications

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

Photo-Induced Electron Transfer Between a Reactant Molecule and Semiconductor Photocatalyst: In Situ Doping

Principles of Heterogeneous Photocatalysis

Contact Info

Product

Resources

About

Liquid phase photooxidation of alcohol over niobium oxide without solvents

Cited by 63 publications

References 27 publications

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb3On− (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb3On− (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

Photo-Induced Electron Transfer Between a Reactant Molecule and Semiconductor Photocatalyst: In Situ Doping

Principles of Heterogeneous Photocatalysis

Contact Info

Product

Resources

About

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations

On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb₃O_n⁻ (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations