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Tribocatalysis-Dominated High-Concentration Dye Degradation: Superior Performance of CuO Over Photocatalysis
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DOI：10.1002/cctc.70864.png)
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Abstract
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Tribocatalysis has become an efficient and low-consumption technology for degrading high-concentration organic dyes, which is different from photocatalysis and other traditional catalytic technologies. This study utilized copper oxide (CuO) nanoparticles to effectively degrade Rhodamine B (RhB) solutions at high concentrations through magnetic stirring. Using a PTFE magnetic rotating disk, CuO nanoparticles exhibited remarkable tribocatalytic degradation of RhB solutions. 99.9% of 100 mg/L RhB in 2 h, 99.2% of 200 mg/L RhB in 4 h, and 99.4% of 300 mg/L RhB in 7 h, all conducted in glass-bottomed beakers. Electron paramagnetic resonance (EPR) analysis further verified that different catalytic approaches significantly influence the ability of CuO nanoparticles to generate reactive oxygen species (•OH and •O2). These findings indicate that, compared with photocatalysis, frictional catalysis has significant advantages in the degradation of high-concentration organic dyes.
Keywords:
CuO nanoparticles
degradation
Rhodamine B
tribocatalysis
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