Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1643938 | Materials Letters | 2014 | 5 Pages |
•Detached TiO2 nanotube arrays with large space between tubes were fabricated.•CdS and CdSe QDs were uniformly co-deposited on both outer and inner tubes.•The catalyst showed high photocatalytic activity and stability under visible light.
Highly detached TiO2 nanotube arrays (TiO2-NTAs) were fabricated by anodization method using electrolyte with high water content. CdS and CdSe quantum dots (QDs) were co-deposited on the TiO2-NTAs. The results showed that the CdS and CdSe QDs were uniformly deposited on both the outer wall and inner tube of TiO2-NTAs. The photocatalytic performance of the as-prepared (CdS–CdSe)/TiO2-NTAs was tested by degradation of methyl orange with 0.2 M Na2S and Na2SO3 as sacrificial reagents under visible light (λ>400 nm). It was found that the photodegradation rate reached as high as 95.1% in 2 h. Also, a reasonable degradation rate of 87.5% was achieved after 3 cycles, suggesting a good stability of the as-prepared (CdS–CdSe)/TiO2-NTAs.
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