Using Ag/Ag2O/SnO2 nanocomposites to remove malachite green by a photocatalytic process

A. Taufik, V. Paramarta, S. P. Prakoso, Rosari Saleh

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Silver/silver oxide/tin oxide nanocomposites of various weight ratios were synthesized using a microwave-assisted method. The Ag/Ag2O:SnO2 nanoparticle weight ratios used were 25:75, 50:50, and 75:25. All samples were characterized using X-ray diffraction, UV-Vis spectroscopy, Differential Scanning Calorimetry and Thermogravimetric Analysis (TGA). The Ag/Ag2O/SnO2 nanocomposites contained cubic structures provided by the Ag and Ag2O and tetragonal structures provided by the SnO2. The silver resulted in surface plasmon resonance (SPR) at a wavelength of about 435 nm. The silver oxide material was transformed into pure Ag at a temperature of about 370 °C The photocatalytic activity was tested on the degradation of malachite green (MG) from an aqueous solution. The results showed that Ag/Ag2O/SnO2 at a ratio of 50:50 exhibited the best photocatalytic performance for degrading MG under visible-light irradiation. The degradation of MG using Ag/Ag2O/SnO2 nanocomposites followed pseudo first-order kinetic reactions, and electron holes were found to be the main species acting on the degradation process.

Original languageEnglish
Article number012017
JournalJournal of Physics: Conference Series
Volume820
Issue number1
DOIs
Publication statusPublished - 5 Apr 2017
Event5th International Conference on Science and Engineering in Mathematics, Chemistry and Physics 2017, ScieTech 2017 - Kuta, Bali, Indonesia
Duration: 21 Jan 201722 Jan 2017

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