Photocatalytic activity enhancement of TiO2 films by micro and nano-structured surface modification

2009 ◽  
Vol 255 (12) ◽  
pp. 6274-6278 ◽  
Author(s):  
M. Bizarro ◽  
M.A. Tapia-Rodríguez ◽  
M.L. Ojeda ◽  
J.C. Alonso ◽  
A. Ortiz
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Tio2 Films ◽  
Structured Surface ◽  
Activity Enhancement

A Novel Heterogeneous Catalyst NH2-MIL-88/PMo10V2 for Photocatalytic Activity Enhancement of Benzene Hydroxylation

2021 ◽  
Author(s):  
PanPan Xu ◽  
Liuxue Zhang ◽  
Xu Jia ◽  
Hao Wen ◽  
Xiulian Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Aromatic Hydrocarbon ◽  
Production Process ◽  
Heterogeneous Catalyst ◽  
Direct Oxidation ◽  
Benzene Hydroxylation ◽  
Activity Enhancement

Comparing to current commercial three-step production process involving low phenol yield, low atomic efficiency, and the formation of explosive intermediates. The direct oxidation of aromatic hydrocarbon to more desirable and...

The Preparation and Photocatalytic Activity of SWNTs Doped ZnO/TiO2 Compound Films

2010 ◽  
Vol 97-101 ◽  
pp. 1611-1615 ◽  
Author(s):  
Qing Wang ◽  
Xin Li Li ◽  
Wei Nie ◽  
Yong Mei Xia ◽  
Jian Feng Dai
Keyword(s):  
Photocatalytic Activity ◽  
Absorption Spectra ◽  
Sol Gel ◽  
Composite Films ◽  
Wavelength Region ◽  
Tio2 Films ◽  
X Ray Diffraction ◽  
Sol Gel Process ◽  
Doped Zno ◽  
Walled Carbon Nanotubes

The ZnO/TiO2 composite films were deposited over glass using spin coating technique by sol-gel process. Single-walled carbon nanotubes (SWNTs) were used to modify the ZnO/TiO2 films successfully in this paper. The structure and composition of the ZnO/TiO2 composite and SWNTs doped ZnO/TiO2 composite were characterized by X-ray diffraction (XRD). The morphology of samples was characterized by scanning electron microscopy (SEM). The photocatalytic activity was investigated by photocatalytic degradation of aqueous methyl orange under ultraviolet (UV) radiation. The UV-vis absorption spectra of the ZnO/TiO2 films and SWNTs doped ZnO/TiO2 films in the wavelength region 200~800 nm were obtained. The results indicate that the SWNTs addition can decrease the grain size of ZnO/TiO2, which can enhance the photocatalytic activity. UV-vis absorption spectra of SWNTs-ZnO/TiO2 showed obvious blue shifts compared with ZnO/TiO2. The optimal amount of doping SWNTs is 1% according to this research. The enhanced mechanism of the SWNTs for the photocatalytic activity in ZnO/TiO2 films was analyzed in this article.

scholarly journals Facile Preparation of Efficient WO3Photocatalysts Based on Surface Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Min Liu ◽  
Hongmei Li ◽  
Yangsu Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Impregnation Method ◽  
Light Spectra ◽  
Simple Strategy ◽  
Visible Light Active ◽  
Efficient Charge ◽  
Surface Modified

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

Alternate coating and porosity as dependent factors for the photocatalytic activity of sol–gel derived TiO2 films

2011 ◽  
Vol 174 (1) ◽  
pp. 190-198 ◽  
Author(s):  
Suhas R. Patil ◽  
B.H. Hameed ◽  
Andrijana Sever Škapin ◽  
Urška Lavrenčič Štangar
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Tio2 Films
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