Photocatalytic Degradation Activity of TiO<sub>2 </sub>Nanotubes<sub> </sub>for Cr(VI)
Xiang Qing LiZhen HongShi Zhao KangLi Xia QinGuo Dong LiJin Mu
Abstract
TiO 2 nanotubes were obtained by calcining at various temperatures. The influence of calcination temperature on the degradation activity of TiO 2 nanotubes for Cr (VI) was investigated under UV light irradiation. It was found that the photocatalytic activity of TiO 2 nanotubes calcinated at 350 °C was the highest. Furthermore, the photocatalytic activity of TiO 2 nanotubes was higher than that of the P25 TiO 2 nanoparticles. Importantly, the stability of TiO 2 nanotubes for the degradation of Cr (VI) was high, and degradation efficiency can still reach 72.4% after 8 recycles. Consequently, a highly stable and active photocatalyst for degradation of Cr (VI) was achieved.
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