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Preparation, characterization and photocatalytic behavior of WO3-fullerene/TiO2 catalysts under visible light.

Meng ZD, Zhu L, Choi JG, Park CY, Oh WC - Nanoscale Res Lett (2011)

Bottom Line: The composite obtained was characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and UV-vis analysis.Excellent photocatalytic degradation of a MO solution was observed using the WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites under visible light.An increase in photocatalytic activity was observed, and WO3-fullerene/TiO2 has the best photocatalytic activity; it may attribute to the increase of the photo-absorption effect by the fullerene and the cooperative effect of the WO3.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Advanced Materials Science & Engineering, Hanseo University, Seosan, Chungnam, 356-706, South Korea. wc_oh@hanseo.ac.kr.

ABSTRACT
WO3-treated fullerene/TiO2 composites (WO3-fullerene/TiO2) were prepared using a sol-gel method. The composite obtained was characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and UV-vis analysis. A methyl orange (MO) solution under visible light irradiation was used to determine the photocatalytic activity. Excellent photocatalytic degradation of a MO solution was observed using the WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites under visible light. An increase in photocatalytic activity was observed, and WO3-fullerene/TiO2 has the best photocatalytic activity; it may attribute to the increase of the photo-absorption effect by the fullerene and the cooperative effect of the WO3.

No MeSH data available.


TEM image of the WO3-fullerene/TiO2 composites.
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Figure 3: TEM image of the WO3-fullerene/TiO2 composites.

Mentions: Figure 3 shows TEM images of the WO3-fullerene/TiO2 composites. TEM is a technique used for analyzing the morphology, crystallographic structure, and even compositing of a specimen. As shown in Figure 3, particles were observed upon enlargement of the images. This indicates that the surface of the WO3 particles is cleaned under exposure to the reaction conditions. Figure 3 shows large clusters with an irregular agglomerated dispersion of TiO2. Fullerene were distributed uniformly outside the surface of the TiO2 nanoparticles with a size of approximately 10 to 20 nm, and WO3 were distributed uniformly over the surface of the fullerene and TiO2, even though this caused partial agglomeration to form block particles. TEM also revealed the presence of metal nanoparticles on the fullerene particles.


Preparation, characterization and photocatalytic behavior of WO3-fullerene/TiO2 catalysts under visible light.

Meng ZD, Zhu L, Choi JG, Park CY, Oh WC - Nanoscale Res Lett (2011)

TEM image of the WO3-fullerene/TiO2 composites.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211879&req=5

Figure 3: TEM image of the WO3-fullerene/TiO2 composites.
Mentions: Figure 3 shows TEM images of the WO3-fullerene/TiO2 composites. TEM is a technique used for analyzing the morphology, crystallographic structure, and even compositing of a specimen. As shown in Figure 3, particles were observed upon enlargement of the images. This indicates that the surface of the WO3 particles is cleaned under exposure to the reaction conditions. Figure 3 shows large clusters with an irregular agglomerated dispersion of TiO2. Fullerene were distributed uniformly outside the surface of the TiO2 nanoparticles with a size of approximately 10 to 20 nm, and WO3 were distributed uniformly over the surface of the fullerene and TiO2, even though this caused partial agglomeration to form block particles. TEM also revealed the presence of metal nanoparticles on the fullerene particles.

Bottom Line: The composite obtained was characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and UV-vis analysis.Excellent photocatalytic degradation of a MO solution was observed using the WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites under visible light.An increase in photocatalytic activity was observed, and WO3-fullerene/TiO2 has the best photocatalytic activity; it may attribute to the increase of the photo-absorption effect by the fullerene and the cooperative effect of the WO3.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Advanced Materials Science & Engineering, Hanseo University, Seosan, Chungnam, 356-706, South Korea. wc_oh@hanseo.ac.kr.

ABSTRACT
WO3-treated fullerene/TiO2 composites (WO3-fullerene/TiO2) were prepared using a sol-gel method. The composite obtained was characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy, and UV-vis analysis. A methyl orange (MO) solution under visible light irradiation was used to determine the photocatalytic activity. Excellent photocatalytic degradation of a MO solution was observed using the WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites under visible light. An increase in photocatalytic activity was observed, and WO3-fullerene/TiO2 has the best photocatalytic activity; it may attribute to the increase of the photo-absorption effect by the fullerene and the cooperative effect of the WO3.

No MeSH data available.