Ag/Ag2O/TiO2 nanocomposites: Microwave-assisted synthesis, characterization, and photosonocatalytic activities

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

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Abstract

Nanocomposites of Ag/Ag2O/TiO2 were synthesized using a microwave-assisted method. As-prepared samples were systematically characterized by X-ray diffraction, electron spin resonance, and diffuse reflectance spectroscopy. The photosonocatalytic performance was investigated under both UV and visible light and ultrasonic irradiation in terms of degradation of methylene blue (MB) dye in aqueous solution. Compared with the pure TiO2 nanoparticles and Ag/Ag2O nanocomposites, the Ag/Ag2O/TiO2 nanocomposites presented more responsive photosonocatalytic activity in the wide range of light wavelengths. It is believed that defect states in TiO2 nanoparticles, which were observed by ESR measurements, played an important role in trapping the charge carrier in the photosonocatalytic process. In addition, the degradation process was studied in terms of the influence of several experimental parameters, and a reasonable mechanism of photosonocatalysis with Ag/Ag2O/TiO2 nanocomposites was proposed by correlating the active radical species involved with the physical properties of the as-synthesized samples.

Original languageEnglish
Article number012029
JournalIOP Conference Series: Materials Science and Engineering
Volume188
Issue number1
DOIs
Publication statusPublished - 2 May 2017
EventInternational Symposium on Current Progress in Functional Materials 2016, ISCPFM 2016 - Bali, Indonesia
Duration: 26 Jul 201627 Jul 2016

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