Scalable and stable silica-coated silver nanoparticles, produced by electron beam evaporation and rapid thermal annealing, for plasmon-enhanced photocatalysis

Catalysis Communications

Venkat R. Bhethanabotla¹  John N. Kuhn²  D. Yogi Goswami³  Amaury P. Betancourt⁴ 

[1] Biomedical Engineering, University of South Florida, 4202 E Fowler Avenue, ENG 030, Tampa, FL 33620, USA;Corresponding author.;;Department of Chemical &Clean Energy Research Center, College of Engineering, University of South Florida, 4202 E Fowler Avenue, ENB118, Tampa, FL 33620, USA;

关键词: Plasmonic stability;    Silver nanoparticles;    Silica coating;    Electron beam evaporation;    Rapid thermal annealing;    Finite difference time domain;   

DOI  :  

来源: DOAJ

【 摘 要 】

This study demonstrates an easy, scalable way to fabricate stable plasmonic photocatalysts for gas-phase photocatalysis. Silver nanoparticles, coated with silica for improved stability, were fabricated via electron beam evaporation and rapid thermal annealing, modeled via finite difference time domain simulations, and characterized. Catalytic performance was evaluated by monitoring total volatile organic compound concentration from toluene degradation in a gas-phase recirculating batch reactor. Results of cycled experiments demonstrate 5-fold increase in apparent quantum yield and 18% increase in reaction rate constant over TiO2. This approach may enable plasmonic photocatalysis by offering a simple, scalable fabrication method more reliable than colloidal synthesis.

【 授权许可】

Unknown