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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.


Decolorization effect on MO of pure TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2.
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Figure 6: Decolorization effect on MO of pure TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2.

Mentions: Two steps are involved in the photocatalytic decomposition of dyes, the adsorption of dye molecules, and their degradation. After adsorption in the dark for 2 h, all the samples reached adsorption-desorption equilibrium [27]. Figure 6 shows the adsorptive and degradation effect of photocatalysts for MO. In the adsorptive step, TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites showed different adsorptive effects with WO3-fullerene having the best adsorptive effect, and the adsorptive effect of pure TiO2 was the lowest. This is because fullerene can enhance the adsorption effect. WO3-fullerene has the largest BET surface area, which will affect the adsorptive effect. The decolorization efficiencies of WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites were 45.17%, 32.12%, and 23.41%, respectively. These results are consistent with the BET surface areas.


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)

Decolorization effect on MO of pure TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: Decolorization effect on MO of pure TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2.
Mentions: Two steps are involved in the photocatalytic decomposition of dyes, the adsorption of dye molecules, and their degradation. After adsorption in the dark for 2 h, all the samples reached adsorption-desorption equilibrium [27]. Figure 6 shows the adsorptive and degradation effect of photocatalysts for MO. In the adsorptive step, TiO2, WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites showed different adsorptive effects with WO3-fullerene having the best adsorptive effect, and the adsorptive effect of pure TiO2 was the lowest. This is because fullerene can enhance the adsorption effect. WO3-fullerene has the largest BET surface area, which will affect the adsorptive effect. The decolorization efficiencies of WO3-fullerene, fullerene-TiO2, and WO3-fullerene/TiO2 composites were 45.17%, 32.12%, and 23.41%, respectively. These results are consistent with the BET surface areas.

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.