Synthesis of Ag 2 O Coated TiO 2 Nanoparticles by Sonochemically Activated Methods for Enhanced Photocatalytic Activitie
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ORIGINAL PAPER
Synthesis of Ag2O Coated TiO2 Nanoparticles by Sonochemically Activated Methods for Enhanced Photocatalytic Activities Anjali Athawale1 · Anuja Bokare1 · Hema Singh1 · Van‑Huy Nguyen2 · Dai‑Viet N. Vo3 · Deepak Kumar4 · Ajit Sharma4
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract TiO2 nanoparticles were successfully synthesized by sol-hydrothermal (SH) method using sonochemically activated precursors. Sonochemical activation yields product bearing desirable crystallinity at relatively lower temperature in comparison with conventional SH method. Glycine was used as a mineralizer in the ultrasound activation process which suppress the formation of brookite phase (of TiO2) observed in the sonochemically activated sample. TiO2 sample synthesized in presence of Glycine [SA-SH(GLY)] was further modified by coating A g2O nanoparticles by sonochemical (SD-Ag) and photochemical (PD–Ag) methods. The deposition by sonochemical method yields product with better crystallinity, high surface area and improved optical properties. Morphological investigations confirm the formation of rounded cube and cube shaped Ag2O particles in the sonochemical and photochemical methods respectively. Photoactivities of the catalysts were investigated in terms of degradation of methyl orange (MO) dye contaminated aquatic waste. Equilibrium of MO photo-degradation was achieved within about 90 min with removal efficiencies of 99.9, 67.1, and 44.4% for SD-Ag, PD–Ag, and SA-SH-(GLY) samples, respectively at 50 mg/L of MO dye concentration. The high photo-catalytic activity of SD-Ag sample was observed for MO photo-degradation, which is attributed to the improved properties like crystallinity, visible light absorption capacity and higher surface area.
* Anjali Athawale [email protected] * Deepak Kumar [email protected] * Ajit Sharma [email protected] 1
Department of Chemistry, University of Pune, Pune 411007, India
2
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
3
Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam
4
Department of Chemical Sciences, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara 144411, India
13
Vol.:(0123456789)
Topics in Catalysis
Graphic Abstract
Advance route of sonochemical activation process for synthesis of A g 2O co-capped T iO 2 nanocomplex for MO photo-degradation Keywords Sonochemical deposition · Photochemical deposition · Cube shaped ag2O nanoparticles · Photocatalysis
1 Introduction Material synthesis is the integral part of modern material research and industrial development. T iO2 is one of the most studied compounds in material science (with more than 40,000 publications over the past 10 years) [1–3]. Synthesis of TiO2 nanomaterials with defined properties such as nanocrystallinity, pure anatase phase, high surface area and low
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