The impact of the Au/Ag ratio on the photocatalytic activity of bimetallic alloy AuAg nanoparticle-decorated ZnO nanorods under UV irradiation

Vivi Fauzia, Aditya Yudiana, Yoki Yulizar, Muhammad Adam Dwiputra, Liszulfah Roza, Iwan Soegihartono

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Zinc oxide (ZnO) is a semiconducting material that is widely used in photocatalytic applications. Unfortunately, due to the rapid electron-hole pair recombination, the photocatalytic efficiency of ZnO is very low. Creating new nanocomposites of ZnO with bimetallic nanoparticles (NPs) is a promising research effort. In this study, the AuAg NPs were deposited onto ZnO nanorods (NRs) grown on a glass substrate using one-pot hydrothermal with five different molar ratios of the HAuCl4 and AgNO3 precursors (1:0, 3:1, 1:1, 1:3, and 0:1). The result shows that the photocatalytic dye degradation performance of ZnO/Au1Ag3 is comparable to that of ZnO/Au (49–50%, k = 0.00709 min−1), which is twice as efficient as the performance of the pristine ZnO (25%, k = 0.00254 min−1). The high number of deposited Au1Ag3 NPs roughened the surface of the nanocomposites, and their role in inhibiting the exciton recombination rates may have a significant effect on enhancing the photocatalytic activity of pristine ZnO.

Original languageEnglish
Article number110038
JournalJournal of Physics and Chemistry of Solids
Volume154
DOIs
Publication statusPublished - Jul 2021

Keywords

  • Bimetallic
  • Ohmic contact
  • Photodegradation
  • Plasmonic
  • Recombination

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