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.

Fabrication of TiO2/Cu Composite Photocatalyst Thin Film by 2-Step Mechanical Coating Technique and its Photocatalytic Activity

2011 ◽  
Vol 415-417 ◽  
pp. 1942-1948 ◽  
Author(s):  
Yun Lu ◽  
Liang Hao ◽  
Keisuke Toh ◽  
Hiroyuki Yoshida
Keyword(s):  
Thin Film ◽  
Photocatalytic Activity ◽  
Separation Efficiency ◽  
Composite Thin Film ◽  
X Ray Diffraction ◽  
Composite Photocatalyst ◽  
Coating Technique ◽  
Cu Thin Film ◽  
Mechanical Coating ◽  
Mass Increase

A novel TiO2/Cu composite photocatalyst thin film was successfully fabricated by 2-step Mechanical Coating Technique (2-step MCT). The composite photocatalyst thin film was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), among others. The formation process of Cu thin film and TiO2/Cu composite photocatalyst thin film were also examined. The results revealed that the formation of Cu thin film can fall into the following stages: nucleation, growth of nuclei and connection, formation and thickening of continuous thin film, and the exfoliation of thin film. In addition, TiO2/Cu composite thin film had a composite microstructure of TiO2islands coated on Cu thin film. Furthermore, the photocatalytic activity of TiO2/Cu composite photocatalyst thin film was evaluated by measuring the degradation rate of methylene blue (MB). Enhancement on the photocatalytic activity of TiO2was confirmed. The improvement of the photocatalytic activity of TiO2/Cu composite photocatalyst thin film should result from the increase of the charge separation efficiency and the mass increase of TiO2in the composite thin film.

Preparation and Photocatalytic Activity of TiO2-Copper Oxides Composite Coatings by Mechanical Coating Technique and Heat Oxidation

2015 ◽  
Vol 719-720 ◽  
pp. 13-16
Author(s):  
Yun Lu ◽  
Liang Hao ◽  
Kou Matsuzaka ◽  
Hiroyuki Yoshida ◽  
Su Jun Guan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Composite Coatings ◽  
High Photocatalytic Activity ◽  
Copper Oxides ◽  
Coating Technique ◽  
Composite Microstructure ◽  
Mechanical Coating

Photocatalytic TiO2–Copper oxides composite coatings were prepared by the mechanical coating technique (MCT) and subsequent heat oxidation. The results showed that Cu particles were mainly adhered to the surfaces of the Ti–Cu composite coatings. After heat oxidation,the Ti coatings were partly oxidized to rutile TiO2 and a Ti–TiO2–Cu2O–CuO composite microstructure was formed. These composite coatings had relative high photocatalytic activity because of the formation of the TiO2–Ti composite microstructure and TiO2–Cu2O–CuO p–n heterojunctions.

Unraveling the quantum dynamics origin of high photocatalytic activity in nitrogen-doped anatase TiO2: time-domain ab initio analysis

2020 ◽  
Vol 8 (47) ◽  
pp. 25235-25244
Author(s):  
Yating Yang ◽  
Zhaosheng Zhang ◽  
Wei-Hai Fang ◽  
Sebastian Fernandez-Alberti ◽  
Run Long
Keyword(s):  
Photocatalytic Activity ◽  
Ab Initio ◽  
Time Domain ◽  
Quantum Dynamics ◽  
High Photocatalytic Activity ◽  
Anatase Tio2 ◽  
Electron Hole ◽  
Nitrogen Doped ◽  
Hole Recombination

TiO2 doping with nitrogen greatly suppresses nonradiative electron-hole recombination and enhances photocatalytic activity.

Influence of oxidation process on photocatalytic activity of photocatalyst coatings by mechanical coating technique

2015 ◽  
Vol 30 ◽  
pp. 128-134 ◽  
Author(s):  
Yun Lu ◽  
Kouta Kobayashi ◽  
Sujun Guan ◽  
Liang Hao ◽  
Hiroyuki Yoshida ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Oxidation Process ◽  
Coating Technique ◽  
Mechanical Coating

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.

V and F Codoped TiO2-SiO2 Composite Films for Enhanced Photocatalytic Activity

2014 ◽  
Vol 955-959 ◽  
pp. 2384-2387
Author(s):  
Ling Xiao Guan ◽  
Yao Yao
Keyword(s):  
Photocatalytic Activity ◽  
Composite Film ◽  
Surface Area ◽  
Composite Films ◽  
Bet Surface Area ◽  
Methyl Green ◽  
Simple Process ◽  
Vis Spectroscopy ◽  
Excellent Photocatalytic Activity ◽  
Photocatalytic Activities

A simple process was developed for preparation of highly photoactive V and F codoped TiO2-SiO2 composite film. The as-prepared specimens were characterized using Brunauer–Emmett–Teller (BET) surface area, photoluminescence (PL) spectra, and UV–Vis spectroscopy. The BET results revealed that the surface area of the modified TiO2 sample was 413 m2 g-1, while pure TiO2 103 m2 g-1. The PL results showed that the recombination rate of the photo-generated electrons and holes was effectively prohibited via the multi-modification. The photocatalytic activities of the films were evaluated by degradation of methyl green (MG) dye. Compared with pure TiO2 film, the multi-modified TiO2 film exhibited excellent photocatalytic activity and clearly responsive to the visible light. Keywords: V and F codoping; TiO2-SiO2 composite film; Photocatalytic activity

Hydrothermal synthesis of the novel rutile-mixed anatase TiO2 nanosheets with dominant {001} facets for high photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (87) ◽  
pp. 84035-84041 ◽  
Author(s):  
Gongsheng Song ◽  
Chengzhi Luo ◽  
Qiang Fu ◽  
Chunxu Pan
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
High Photocatalytic Activity ◽  
Anatase Tio2 ◽  
The Novel ◽  
Hydrothermal Route ◽  
Tio2 Nanosheets

We introduce a hydrothermal route to synthesize rutile-mixed anatase nanosheets with dominant {001} facets for high photocatalytic activity.

Sign in / Sign up

Export Citation Format

Share Document