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.

Remarkably enhanced photoinduced charge separation rate of Bi2WO6 by Cu2+ doping

2018 ◽  
Vol 124 (9) ◽  
Author(s):  
Junbo Zhong ◽  
Jiufu Chen ◽  
Qi Yang ◽  
Chuan Hu ◽  
Jianzhang Li ◽  
...  
Keyword(s):  
Charge Separation ◽  
Separation Rate ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Photocatalytic Performance of Bi2O3 Prepared with NH3•H2O under Different pH Value

2012 ◽  
Vol 178-181 ◽  
pp. 641-644 ◽  
Author(s):  
Xi Yang He ◽  
Jian Zhang Li ◽  
Jun Bo Zhong ◽  
Wei Hu
Keyword(s):  
Photocatalytic Activity ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Ph Value ◽  
Strong Dependence ◽  
Precipitation Method ◽  
Surface Parameters ◽  
Separation Rate ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

In this paper, parallel flaw precipitation method has been employed to fabricate nanostructured Bi2O3. It is found that the surface parameters, bandgap, the photoinduced charge separation rate and photocatalytic performance of Bi2O3 have a strong dependence on the pH value of precipitation reaction.The prepared photocatalysts were characterized by BET, XRD, UV-Vis diffuse reflectance and surface photovoltage spectroscopy (SPS). The results show that Bi2O3 prepared under pH value10.0 exhibits the best photocatalytic activity among the experimented compositions. The results of further experiments show that surface parameters, bandgap, the photoinduced charge separation rate all play an important role in promotion of photocatalytic activity of Bi2O3 prepared under pH value 10.0.

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.

Enhanced Photocatalytic Activity of α-Fe2O3 Prepared with the Assistance of Ionic Liquid

2014 ◽  
Vol 685 ◽  
pp. 123-126
Author(s):  
Yan Lu
Keyword(s):  
Photocatalytic Activity ◽  
Specific Surface ◽  
Charge Separation ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Separation Rate ◽  
Surface Photovoltage Spectroscopy ◽  
Induced Charge ◽  
Underlying Mechanisms

In this paper, α-Fe2O3 photocatalyst with high photocatalytic activity (IL-α-Fe2O3) was fabricated via hydrothermal routine using 1-ethyl-3- methylimidazolium dihydrophosphate ([EMIm]H2PO4). The specific surface area, structure, the photo-induced charge separation rate were characterized by Brunauer-Emmett-Teller (BET) measurements, X-ray diffraction (XRD), and surface photovoltage spectroscopy (SPS), respectively. The results show that adding ([EMIm]H2PO4 into the synthetic system alters the specific surface parameters and photo-induced charge separation rate. The photocatalytic activity for decolorization of methyl orange (MO) solution was investigated. The results show that the photocatalytic activity of IL-α-Fe2O3 is more than 2.5 times that of the reference α-Fe2O3 and the underlying mechanisms are discussed.

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.

Sign in / Sign up

Export Citation Format

Share Document