Silver nanoparticles anchored TiO2 nanotubes prepared using saponin extract as heterogeneous and recyclable catalysts for reduction of dyes

Chitrabanu C. Paramesh, Guddappa Halligudra, Murthy Muniyappa, Manjunath Shetty, Kiran K. Somashekharappa, Dinesh Rangappa, Kanchugarakoppal S. Rangappa, Prasanna D. Shivaramu

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

In the present study, we made an effort to synthesize silver nanoparticles anchored onto TiO2 nanotubes using saponin extracted from Simarouba glauca oil seed meal. Obtained silver anchored TiO2 nanotubes (Ag-TiO2) were characterized using spectroscopic, microscopic and X‐ray diffraction techniques and used as catalysts for reduction of nitrophenol (NP), Methylene blue (MB), Methyl orange (MO) and Congo red (CR). The reduction reactions were carried out in aqueous medium in presence of NaBH4 at room temperature. Progress of the catalytic reaction was observed by decolorization of the dye solution and monitored by recording UV–Vis spectra. It was observed that Ag-TiO2 nanotubes emerged as an effective catalyst in reducing the dyes in the time range of 2–7 min with pseudo first-order kinetics and also effective in the simultaneous reduction of all dyes in 12 min. In addition, the catalyst showed a good recovery yield with unaffected catalytic efficiency up to ten cycles.

Original languageEnglish
Pages (from-to)14750-14759
Number of pages10
JournalCeramics International
Volume47
Issue number10
DOIs
Publication statusPublished - 15-05-2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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