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Synthesis and highly visible-induced photocatalytic activity of CNT-CdSe composite for methylene blue solution.

Chen ML, Oh WC - Nanoscale Res Lett (2011)

Bottom Line: Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material.The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer.The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.

View Article: PubMed Central - HTML - PubMed

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

ABSTRACT
Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer. The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.

No MeSH data available.


Degradation of MB under visible light irradiation for the CdSe compound and CNT-CdSe composite.
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Figure 9: Degradation of MB under visible light irradiation for the CdSe compound and CNT-CdSe composite.

Mentions: Figure 9 represents the degradation of MB over CdSe compound and CNT-CdSe composite under visible-light irradiation, the MB concentration is 1×10-5 mol/L; the amount of CdSe compound and CNT-CdSe composite is 0.05 g. We can clearly see that the concentration of the MB solution gradually diminish with increasing irradiation time for all of samples. After irradiation for 240 min, the CdSe compound has almost no photocatalytic activity toward the photodegradation of MB solution. The presumed reason is that a mass of visible light may be absorbed by the MB molecules in aqueous solution rather than the CdSe particles for high MB concentration, which can reduce the efficiency of the catalytic reaction. However, for CNT-CdSe composite, a much excellent photocatalytic activity toward the photodegradation of MB solution can be observed and the MB concentration is removed 55% after irradiation under visible light for 240 min.


Synthesis and highly visible-induced photocatalytic activity of CNT-CdSe composite for methylene blue solution.

Chen ML, Oh WC - Nanoscale Res Lett (2011)

Degradation of MB under visible light irradiation for the CdSe compound and CNT-CdSe composite.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211492&req=5

Figure 9: Degradation of MB under visible light irradiation for the CdSe compound and CNT-CdSe composite.
Mentions: Figure 9 represents the degradation of MB over CdSe compound and CNT-CdSe composite under visible-light irradiation, the MB concentration is 1×10-5 mol/L; the amount of CdSe compound and CNT-CdSe composite is 0.05 g. We can clearly see that the concentration of the MB solution gradually diminish with increasing irradiation time for all of samples. After irradiation for 240 min, the CdSe compound has almost no photocatalytic activity toward the photodegradation of MB solution. The presumed reason is that a mass of visible light may be absorbed by the MB molecules in aqueous solution rather than the CdSe particles for high MB concentration, which can reduce the efficiency of the catalytic reaction. However, for CNT-CdSe composite, a much excellent photocatalytic activity toward the photodegradation of MB solution can be observed and the MB concentration is removed 55% after irradiation under visible light for 240 min.

Bottom Line: Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material.The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer.The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.

View Article: PubMed Central - HTML - PubMed

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

ABSTRACT
Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer. The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.

No MeSH data available.