Uniformly dispersed CdS/CdSe quantum dots co-sensitized TiO2 nanotube arrays with high photocatalytic property under visible light

作者：Liu, Lingjuan; Hui, Jianing; Su, Lili; Lv, Jun; Wu, Yucheng^*; Irvine, John T S

来源：Materials Letters, 2014, 132: 231-235.

DOI：10.1016/j.matlet.2014.06.082

• TiO2 nanotube arrays
• CdS-CdSe quantum dots
• Semiconductors
• Nanocomposites
• Visible-light activity

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 (lambda > 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.

• 出版日期2014-10-1
• 单位合肥工业大学