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Enhanced photoelectrochemical and photocatalytic activity of WO3-surface modified TiO2 thin film.

Qamar M, Drmosh Q, Ahmed MI, Qamaruddin M, Yamani ZH - Nanoscale Res Lett (2015)

Bottom Line: An enhancement in the photocurrent was observed when the TiO2 surface was modified WO3 nanoparticles.Photocatalytic activity of TiO2 and WO3-modified TiO2 for the decolorization of methyl orange was tested.Graphical abstractWO3-surface modified TiO2 film showing better photocatalytic and photoelectrocatalytic activity.

View Article: PubMed Central - PubMed

Affiliation: Center of Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Box 498, Dhahran, 31261 Saudi Arabia.

ABSTRACT
Development of nanostructured photocatalysts for harnessing solar energy in energy-efficient and environmentally benign way remains an important area of research. Pure and WO3-surface modified thin films of TiO2 were prepared by magnetron sputtering on indium tin oxide glass, and photoelectrochemical and photocatalytic activities of these films were studied. TiO2 particles were <50 nm, while deposited WO3 particles were <20 nm in size. An enhancement in the photocurrent was observed when the TiO2 surface was modified WO3 nanoparticles. Effect of potential, WO3 amount, and radiations of different wavelengths on the photoelectrochemical activity of TiO2 electrodes was investigated. Photocatalytic activity of TiO2 and WO3-modified TiO2 for the decolorization of methyl orange was tested. Graphical abstractWO3-surface modified TiO2 film showing better photocatalytic and photoelectrocatalytic activity.

No MeSH data available.


Related in: MedlinePlus

FESEM images, EDS spectrum, and absorption spectra of TiO2and WO3/TiO2bilayer films. Field emission scanning electron microscopic image of (A) TiO2 film and (B) WO3/TiO2 bilayer film (deposition time = 5 min), (C) EDS spectrum of WO3/TiO2 bilayer film, and (D) absorption spectra of TiO2 and WO3/TiO2 films (deposition time = 5 min).
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Fig1: FESEM images, EDS spectrum, and absorption spectra of TiO2and WO3/TiO2bilayer films. Field emission scanning electron microscopic image of (A) TiO2 film and (B) WO3/TiO2 bilayer film (deposition time = 5 min), (C) EDS spectrum of WO3/TiO2 bilayer film, and (D) absorption spectra of TiO2 and WO3/TiO2 films (deposition time = 5 min).

Mentions: Structural analyses of films were carried out using FESEM, and representative images are illustrated in Figure 1. Pure titania film (Figure 1A) was found to be composed of nonspherical and irregular grains of <50-nm size with a certain degree of concavities between the grains. On the other hand, WO3 particles were somewhat spherical in shape and smaller in size (<20 nm) with homogeneous and narrow distribution throughout the surface of TiO2, as illustrated in Figure 1B. A representative EDS spectrum of film has been delineated in Figure 1C which indicated the presence of W, Ti, and O, along with Sn and In which are coming from ITO coatings. Unlabeled peaks may be ascribed to various elements present in glass slide.Figure 1


Enhanced photoelectrochemical and photocatalytic activity of WO3-surface modified TiO2 thin film.

Qamar M, Drmosh Q, Ahmed MI, Qamaruddin M, Yamani ZH - Nanoscale Res Lett (2015)

FESEM images, EDS spectrum, and absorption spectra of TiO2and WO3/TiO2bilayer films. Field emission scanning electron microscopic image of (A) TiO2 film and (B) WO3/TiO2 bilayer film (deposition time = 5 min), (C) EDS spectrum of WO3/TiO2 bilayer film, and (D) absorption spectra of TiO2 and WO3/TiO2 films (deposition time = 5 min).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385024&req=5

Fig1: FESEM images, EDS spectrum, and absorption spectra of TiO2and WO3/TiO2bilayer films. Field emission scanning electron microscopic image of (A) TiO2 film and (B) WO3/TiO2 bilayer film (deposition time = 5 min), (C) EDS spectrum of WO3/TiO2 bilayer film, and (D) absorption spectra of TiO2 and WO3/TiO2 films (deposition time = 5 min).
Mentions: Structural analyses of films were carried out using FESEM, and representative images are illustrated in Figure 1. Pure titania film (Figure 1A) was found to be composed of nonspherical and irregular grains of <50-nm size with a certain degree of concavities between the grains. On the other hand, WO3 particles were somewhat spherical in shape and smaller in size (<20 nm) with homogeneous and narrow distribution throughout the surface of TiO2, as illustrated in Figure 1B. A representative EDS spectrum of film has been delineated in Figure 1C which indicated the presence of W, Ti, and O, along with Sn and In which are coming from ITO coatings. Unlabeled peaks may be ascribed to various elements present in glass slide.Figure 1

Bottom Line: An enhancement in the photocurrent was observed when the TiO2 surface was modified WO3 nanoparticles.Photocatalytic activity of TiO2 and WO3-modified TiO2 for the decolorization of methyl orange was tested.Graphical abstractWO3-surface modified TiO2 film showing better photocatalytic and photoelectrocatalytic activity.

View Article: PubMed Central - PubMed

Affiliation: Center of Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Box 498, Dhahran, 31261 Saudi Arabia.

ABSTRACT
Development of nanostructured photocatalysts for harnessing solar energy in energy-efficient and environmentally benign way remains an important area of research. Pure and WO3-surface modified thin films of TiO2 were prepared by magnetron sputtering on indium tin oxide glass, and photoelectrochemical and photocatalytic activities of these films were studied. TiO2 particles were <50 nm, while deposited WO3 particles were <20 nm in size. An enhancement in the photocurrent was observed when the TiO2 surface was modified WO3 nanoparticles. Effect of potential, WO3 amount, and radiations of different wavelengths on the photoelectrochemical activity of TiO2 electrodes was investigated. Photocatalytic activity of TiO2 and WO3-modified TiO2 for the decolorization of methyl orange was tested. Graphical abstractWO3-surface modified TiO2 film showing better photocatalytic and photoelectrocatalytic activity.

No MeSH data available.


Related in: MedlinePlus