基于钯修饰的介孔TiO2纳米棒高效光降解四环素的研究

doi:10.19964/j.issn.1006-4990.2024-0244

Abstract

Abstract:

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 borohydride 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% demonstrated 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（removal rate 67.1%）.Further analysis using a pseudo-first-order kinetic model revealed that the Pd/mTiO₂ NRs sample possessed 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.

Key words: tetracycline, mesoporous TiO₂ nanorods, metal palladium particles, photodegradation

CLC Number:

TQ134.1

SUN Yanlong, YUAN Guangsheng, WANG Hongjun. Study on palladium modified mesoporous TiO₂ nanorods for efficient photodegradation of tetracycline[J]. Inorganic Chemicals Industry, 2024, 56(9): 147-153.

Figures/Tables 8

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Table 1

References 30

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循环次数/次	去除率/%	循环次数/次	去除率/%
1	96.4	4	94.5
2	95.7	5	93.2
3	93.9

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Study on palladium modified mesoporous TiO₂ nanorods for efficient photodegradation of tetracycline

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Study on palladium modified mesoporous TiO2 nanorods for efficient photodegradation of tetracycline