scholarly journals Nanocrystalline TiO2with enhanced photoinduced charge separation as catalyst for the phenol degradation

2006 ◽  
Vol 2006 ◽  
pp. 1-6 ◽  
Author(s):  
Carmen Canevali ◽  
Franca Morazzoni ◽  
Roberto Scotti ◽  
Ignazio Renato Bellobono ◽  
Marco Giusti ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Charge Separation ◽  
Sol Gel ◽  
Phenol Degradation ◽  
Lower Surface ◽  
Morphological Properties ◽  
High Catalytic Activity ◽  
Photoinduced Charge Separation ◽  
Degussa P25 ◽  
Photoinduced Charge

Nanocrystalline TiO2catalysts based on pure rutile (R100) and a 30% of anatase and 70% of rutile (R70) were synthesized by the sol-gel method, using Pluronic PE 6400 as templating agent. Catalysts were characterized in terms of structural and morphological properties; moreover, the formation of paramagnetic charge carriers under UV irradiation was studied and related to the activity of TiO2in the photoinduced degradation of phenol. With respect to Degussa P25, the two sol-gel catalysts show lower surface area and a wider pore size distribution. The EPR spectra recorded under UV irradiation show enhanced charge separation in the sol-gel samples, with the O−species in higher amount than in Degussa P25. This result is in agreement with the high catalytic activity of R100 sample in the photoinduced degradation of phenol, very similar to that displayed by Degussa P25 and higher than that of R70 sample.

Ionic Liquid-Assisted Fabrication of ZnO with Enhanced Photocatalytic Performance

2013 ◽  
Vol 361-363 ◽  
pp. 722-725
Author(s):  
Xing Wen Zheng ◽  
Zheng Hua Xiao ◽  
Jun Bo Zhong ◽  
Wei Hu
Keyword(s):  
Ionic Liquid ◽  
Charge Separation ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Separation Rate ◽  
Surface Photovoltage Spectroscopy ◽  
Photocatalytic Decolorization ◽  
Structure Morphology ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

In this paper, ZnO photocatalyst was prepared by sol-gel method with the assistance of ionic liquid (IL). The structure, morphology and the photoinduced charge separation rate of the photocatalyst prepared (IL-ZnO) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and surface photovoltage spectroscopy (SPS), respectively. The results reveal that ionic liquid enhances the photoinduced charge separation rate. The activity of ZnO for photocatalytic decolorization of methyl orange (MO) solution was evaluated. The results show that the photocatalytic activity of IL-ZnO is higher than that of ZnO.

Long-lived photoinduced charge separation in a redox system trapped in a sol–gel glass

Nature ◽  
1992 ◽  
Vol 355 (6357) ◽  
pp. 240-242 ◽  
Author(s):  
Anny Slama-Schwok ◽  
Michael Ottolenghi ◽  
David Avnir
Keyword(s):  
Charge Separation ◽  
Sol Gel ◽  
Redox System ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Anionic Fluorinated Zn-porphyrin Combined with Cationic Endohedral Li-fullerene for Long-Lived Photoinduced Charge Separation with Low Energy Loss

2021 ◽  
Vol 125 (3) ◽  
pp. 918-925
Author(s):  
Kazuhira Miwa ◽  
Shinobu Aoyagi ◽  
Takahiro Sasamori ◽  
Hiroshi Ueno ◽  
Hiroshi Okada ◽  
...  
Keyword(s):  
Energy Loss ◽  
Charge Separation ◽  
Low Energy ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Photoinduced charge separation in microporous and mesoporous materials

2011 ◽  
Vol 89 (3) ◽  
pp. 257-265 ◽  
Author(s):  
Ranjit T. Koodali
Keyword(s):  
Mesoporous Materials ◽  
Charge Separation ◽  
Organic Molecules ◽  
Microporous Materials ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge ◽  
Mcm 41

A review of photoinduced charge separation of organic molecules in microporous and mesoporous materials is presented. In particular, the photoionization of N-alkylphenothiazine (PCn), N,N,N′,N′-tetramethylbenzidine (TMB), and porphyrin in microporous materials, such as zeolites, aluminophosphates (AlPOs), silicoaluminophosphates (SAPOs), and mesoporous materials, such as MCM-41, MCM-48, and SBA-15, is discussed.

Photoinduced charge separation in self-assembled cofacial pentamers of zinc-5,10,15,20-tetrakis(perylenediimide)porphyrin

2007 ◽  
Vol 9 (12) ◽  
pp. 1469 ◽  
Author(s):  
Michael J. Ahrens ◽  
Richard F. Kelley ◽  
Zachary E. X. Dance ◽  
Michael R. Wasielewski
Keyword(s):  
Charge Separation ◽  
Photoinduced Charge Separation ◽  
Self Assembled ◽  
Photoinduced Charge

The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

2016 ◽  
Vol 18 (6) ◽  
pp. 4300-4303 ◽  
Author(s):  
J. Huang ◽  
Y. Tang ◽  
K. L. Mulfort ◽  
X. Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Charge Separation ◽  
Cdse Quantum Dots ◽  
X Ray ◽  
Molecular Catalyst ◽  
Cdse Quantum Dot ◽  
Photoinduced Charge Separation ◽  
X Ray Absorption ◽  
Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

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