Journal
APPLIED SCIENCES-BASEL
Volume 10, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/app10103345
Keywords
plasma-liquid interaction; sunlight degradation; Au; TiO2 nanocomposite; surface treatment; noble metal based photocatalyst
Categories
Funding
- International Center of Physics under the UNESCO
- Russian Foundation for Basic Research [19-52-54003 Viet_a]
- [QTRU01.01/19-20]
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To enhance the effectiveness of TiO2 as a photocatalyst, it was believed that the drawbacks of the large bandgap and the rapid electron-hole recombination can be overcome by coupling TiO2 with plasmonic metal nanoparticles. The incorporation of the nanoparticles onto the TiO2 surface requires a suitable procedure to achieve the proper particle adhesion. In this work, we propose a simple, clean, and effective surface activation of TiO2 using plasma enhanced wet chemical surface treatment. Under only 5 min of plasma treatment in a 3% NH3/3% H2O2 solution, gold nanoparticles were found better adhered onto the TiO2 surface. Hence, the methylene blue degradation rate of the Au/TiO2 under sunlight treated was improved by a factor of 3.25 times in comparison to non-treated Au/TiO2 and by 13 times in comparison to the bare rutile TiO2.
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