Decoration of Ag/Bi nanoparticles over brown TiO2-x/AgBiO3 nanocomposites: QDs-sized photocatalysts for impressive mitigation of water pollutants

Salmanzadeh-Jamadi Z., Habibi-Yangjeh A., Khataee A.

Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol.682, 2024 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 682
  • Publication Date: 2024
  • Doi Number: 10.1016/j.colsurfa.2023.132945
  • Journal Name: Colloids and Surfaces A: Physicochemical and Engineering Aspects
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Compendex, EMBASE, INSPEC
  • Keywords: Bi-based plasmonic photocatalyst, Brown TiO2−x, Oxygen vacancy, S-scheme photocatalyst, TiO2−x/Ag/AgBiO3/Bi nanocomposites, Visible-light-triggered photocatalysis
  • Istanbul Technical University Affiliated: No


Heterogeneous photocatalysis is a hot-spot research field for energy conversion and water detoxification. One of the most important challenges of photocatalysis is the designing and development of efficacious visible-light-triggered photocatalysts. In this regard, perovskite AgBiO3 and Ag/Bi elemental nanoparticles were decorated on brown TiO2−x via a facile procedure. Electron microscopy, XPS, and XRD studies provided strong evidence about developing TiO2−x/Ag/AgBiO3/Bi photocatalysts with quantum dot size of about 5.5 nm, and intimate contact among the counterparts. The TiO2−x/Ag/AgBiO3/Bi photocatalysts displayed boosted ability in the detoxification of tetracycline (TC), amoxicillin (AMX), fuchsine (FS), and methylene orange (MO) pollutants. The degradation rate constants of TC, AMX, FS, and MO over the optimum TiO2−x/Ag/AgBiO3/Bi photocatalyst were 25.9, 3.40, 5.70, and 1.92 folds greater than TiO2−x and 20.3, 12.3, 6.77, and 2.33 times larger than Ag/AgBiO3/Bi, respectively. Photoluminescence spectroscopy, EIS experiments, and Bode plots showed accelerated charge transfer and significant reduction of charges recombination within TiO2−x/Ag/AgBiO3/Bi nanocomposites. The recycling studies showed that the plasmonic photocatalyst retained the most activity after four times of utilization. Ultimately, an s-scheme charges segregation route was suggested for the boosted activity of the plasmonic TiO2−x/Ag/AgBiO3/Bi photocatalysts.