Study on palladium modified mesoporous TiO2 nanorods for efficient photodegradation of tetracycline
This study aims to develop a high-performance photocatalyst specifically designed for the effective degradation of tetracycline(TC)in environmental purification.The composite of mesoporous titanium dioxide nanorods uniformly loaded with palladium metal particles(Pd/mTiO2 NRs)was successfully prepared using electrospinning technology and sodium bo-rohydride reduction method.Subsequently,the photocatalytic activity for TC degradation on these catalysts was evaluated.The experimental results showed that the Pd/mTiO2 NRs nanocomposites with an optimal Pd loading capacity of 3%demon-strated an excellent catalytic performance in photodegradation of TC.After 1 h of photoreaction,the removal rate of TC over the Pd/mTiO2 NRs catalyst was as high as 96.4%,which was about 1.45 times higher than that of the single mTiO2 NRs(re-moval rate 67.1%).Further analysis using a pseudo-first-order kinetic model revealed that the Pd/mTiO2 NRs sample pos-sessed a very high degradation rate constant,reaching k=0.053 58 min-1,which was more than 5 times that of mTiO2 NRs(0.010 68 min-1).More importantly,after 5 cycles of use,the photocatalytic efficiency of the the Pd/mTiO2 NRs composite remained almost unchanged,demonstrating its good structural stability and recyclable.The present study not only provided new research ideas for the development of efficient photocatalysts,but also offered strong technical support for the field of environmental purification and effective approaches for solving practical environmental problems.
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