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image of Preparation of Photoelectrodes of Pd/Ag/TiO2 NTs and Photoelectrocatalytic Degradation of Tylosin

Abstract

Introduction

In this study, aiming to solve the problem of difficult recovery of powder catalysts in the treatment of antibiotic wastewater by photocatalytic technology, titanium dioxide nanotubes (TiO NTs) photoelectrodes were prepared on titanium sheet substrates by anodic oxidation method.

Methods

The precious metals Pd and Ag were introduced to be co-deposited, which realized the effective transfer of photogenerated electrons between the semiconductor and the precious metals and remarkably improved the photoelectrocatalytic activity of the photoelectrodes.

Results

The experimental results showed that the prepared Pd/Ag/TiO NTs composite photoelectrode achieved a removal efficiency of 79.51% for tylosin (TYL) within 240 min, which was significantly better than that of the pure TiO NTs (1.42-fold) and Ag/TiO NTs (1.05-fold) photoelectrodes. Electrochemical analyses demonstrated that the loading of Ag and Pd on the surface of TiO NTs can effectively promote the transport and separation of photogenerated charge carriers, thus improving the photoelectrocatalytic performance. In addition, the degradation process of TYL and the dynamic changes of intermediates were deeply analyzed with the help of three-dimensional fluorescence spectroscopy (3D EEMs) and two-dimensional correlation spectroscopy (2DCOS) techniques.

Conclusion

This study provides not only an expanded application of solid catalysts in photoelectrocatalytic treatment of antibiotic wastewater but also new insights for further investigation of the co-deposition of precious metals to improve photoelectrodes.

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2025-01-07
2025-10-29

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Preparation of Photoelectrodes of Pd/Ag/TiO2 NTs and Photoelectrocatalytic Degradation of Tylosin
Bentham Science Publishers ; https://doi.org/10.2174/0115734110351701241122105401
/content/journals/cac/10.2174/0115734110351701241122105401
/content/journals/cac/10.2174/0115734110351701241122105401
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  • Article Type:     Research Article
Keywords: precious metal co-deposition ; matter ; wastewater ; treatment ; dynamic change ; Photoelectrocatalytic

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