Photochemical synthesis of bimetallic gold/silver nanoparticles in polymer matrix with tunable absorption properties: Superior photocatalytic activity for degradation of methylene blue


Kazancioglu E. O. , AYDIN M. , ARSU N.

MATERIALS CHEMISTRY AND PHYSICS, vol.269, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 269
  • Publication Date: 2021
  • Doi Number: 10.1016/j.matchemphys.2021.124734
  • Title of Journal : MATERIALS CHEMISTRY AND PHYSICS
  • Keywords: Gold, silver bimetallic nanoparticles, Photopolymerization, Thioxanthone-dioxide, Photocatalytic degradation, SILVER NANOPARTICLES, GOLD NANOPARTICLES, ELECTRON-TRANSFER, PHOTOINITIATOR, AG, NANOCOMPOSITES, PLATINUM, SYSTEMS, ACID

Abstract

Bimetallic nanoparticles are widely used in chemical catalysis. Their practical performance can be better exploited through morphological control by adjusting the synthetic strategy. Herein, a photochemical synthesis route was used to achieve the controlled preparation of bimetallic Au/Ag BNps. Size and shape control is achieved depending on the type of initiating radical therefore synthesized new one-component Type II photoinitiator, namely 2-thioxanthone thioacetic acid-dioxide was employed for the synthesis of Au/Ag BNp both in solution and polymer matrix. The effect of the gold/silver ratio on the nanoparticle size, shape and distribution was investigated, and the characterization of the obtained nanoparticles was performed by UV & ndash;Vis spectrophotometry, DLS and SEM techniques. Additionally, photocatalytic oxidative degradation of methylene blue was achieved with the prepared Au/Ag bimetallic nanocomposite films. By evaluating the photocatalytic oxidation degradation of methylene blue under UV & ndash;Vis light irradiation, 2:1 ratio of Au/Ag nanoparticles containing nanocomposite film exhibit the best activity compared with other composition of Au/Ag. The size and high SPR absorption band are thought to be responsible for superior photocatalytic activity.