Performance Improvement of TiO2/Ti Composite Photocatalyst Film by Heat Oxidation Treatment

2011 ◽  
Vol 675-677 ◽  
pp. 1233-1236 ◽  
Author(s):  
Yun Lu ◽  
Hiroyuki Yoshida ◽  
Keisuke Toh ◽  
Liang Hao ◽  
Mitsuji Hirohashi
Keyword(s):  
Photocatalytic Activity ◽  
Composite Film ◽  
Performance Improvement ◽  
Oxidation Treatment ◽  
Composite Photocatalyst

In the present work, heat oxidation treatment was carried out for improving the photocatalyst activity of TiO2/Ti composite film. The microstructures and photocatalytic activity of the composite film were investigated. Effect of heat oxidation treatment was discussed. The results show that crystallinity of TiO2 in the composite film was improved by heat oxidation treatment. The photocatalyst activity was increased owing to the improvement of TiO2 crystallinity by heat oxidation treatment.

Formation of TiO2/Ti Composite Photocatalyst Film by 2-Step Mechanical Coating Technique

2011 ◽  
Vol 675-677 ◽  
pp. 1229-1232 ◽  
Author(s):  
Yun Lu ◽  
Hiroyuki Yoshida ◽  
Hiroyuki Nakayama ◽  
Liang Hao ◽  
Mitsuji Hirohashi
Keyword(s):  
Photocatalytic Activity ◽  
Composite Film ◽  
Random Distribution ◽  
High Photocatalytic Activity ◽  
Anatase Tio2 ◽  
Composite Photocatalyst ◽  
Simple Process ◽  
Coating Technique ◽  
Nonuniform Thickness ◽  
Mechanical Coating

In the present work, 2-step mechanical coating technique (2-step MCT), an advanced MCT, was proposed and carried out to form TiO2/Ti composite photocatalyst film with anatase TiO2. The microstructures and photocatalytic activity of the composite film were investigated. The results show that the proposed 2-step MCT is a simple process for forming TiO2/Ti composite film. The composite film has a microstructure with a nonuniform thickness, like random distribution islands. The TiO2/Ti composite film has high photocatalytic activity, which is related with crystallinity and volume of the TiO2 in the composite film.

Visible light-driven novel g-C3N4/NiFe-LDH composite photocatalyst with enhanced photocatalytic activity towards water oxidation and reduction reaction

2015 ◽  
Vol 3 (36) ◽  
pp. 18622-18635 ◽  
Author(s):  
Susanginee Nayak ◽  
Lagnamayee Mohapatra ◽  
Kulamani Parida
Keyword(s):  
Photocatalytic Activity ◽  
Composite Materials ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Reduction Reaction ◽  
Light Irradiation ◽  
Composite Photocatalyst ◽  
Visible Light Driven

Dispersion of exfoliated CN over the surface of exfoliated LDH composite materials, and its photocatalytic water splitting under visible-light irradiation.

Enhanced photocatalytic activity of Pt/WO3photocatalyst combined with TiO2nanoparticles by polyelectrolyte-mediated electrostatic adsorption

2015 ◽  
Vol 5 (2) ◽  
pp. 1163-1168 ◽  
Author(s):  
Tomomi Ohashi ◽  
Takashi Sugimoto ◽  
Kaori Sako ◽  
Shinjiro Hayakawa ◽  
Kiyofumi Katagiri ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
High Activity ◽  
Visible Light Irradiation ◽  
Composite Structure ◽  
Light Irradiation ◽  
Electrostatic Adsorption ◽  
Composite Photocatalyst

An electrostatic adsorption approach was used to realize a composite structure in which larger WO3crystalline particles were surrounded by TiO2nanoparticles. The Pt/WO3–TiO2composite photocatalyst showed a high activity under visible light irradiation (λ> 420 nm).

scholarly journals Copper oxide supported on graphene for phodegradation of rhodamine B

2015 ◽  
Vol 11 (4) ◽  
Author(s):  
Nurul Sahida Hassan ◽  
Nurul Jamilah Roslani ◽  
Aishah Abdul Jalil ◽  
Sugeng Triwahyono ◽  
Nur Fatien Salleh ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Copper Oxide ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Industrial Wastewater ◽  
Water Contamination ◽  
X Ray Diffraction ◽  
Composite Photocatalyst ◽  
X Ray ◽  
First Order

In recent years, dyes are one of the major sources of the water contamination that lead to environmental problems. For instance, Rhodamine B (RhB) which was extensively used as a colorant in textile industries is toxic and carcinogenic. Among many techniques, photocatalytic degradation become the promising one to remove those dyes from industrial wastewater. Recently, graphene has shown outstanding performance in this application due to its intrinsic electron delocalisation which promotes electron transport between composite photocatalyst and pollutant molecules. While, copper oxide (CuO) is well-known has a lower bandgap energies compared to other semiconductors. Therefore, in this study, copper oxide supported on graphene (CuO/G) was prepared and its photocatalytic activity was tested on degradation of RhB. The catalysts were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) Spectroscopy. The results showed that the interaction between copper and graphene support could enhance the photocatalytic activity. The 5 wt% CuO/G was found to give the highest degradation (95%) of 10 mg L-1 of RhB solution at pH 7 using 1 g L-1 catalyst after 4 hours under visible light irradiation. The photodegradation followed the pseudo first-order Langmuir-Hinshelwood kinetic model. This study demonstrated that the CuO/G has a potential to be used in photocatalytic degradation of various organic pollutants.

scholarly journals Photocatalytic Activity of Ag-TiO2 (anatase) Composite Film Prepared by Composite Coating

2004 ◽  
Vol 72 (3) ◽  
pp. 156-158 ◽  
Author(s):  
Fumio YAMAGUCHI ◽  
Tomohiro FUJITA ◽  
Yasuhiro KANEGA ◽  
Koichi UI ◽  
Yasushi IDEMOTO ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Composite Film ◽  
Composite Coating
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