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Plasmonic photocatalysis in oxide glasses containing silver nanoparticles

Grant number: 19/16230-1
Support type:Scholarships in Brazil - Master
Effective date (Start): April 01, 2020
Effective date (End): April 30, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal Investigator:Danilo Manzani
Grantee:Thiago Israel Rubio
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass, AP.CEPID

Abstract

This project aims to synthesize oxide glasses containing atoms with recognized photocatalytic activity, such as cerium, bismuth, and titanium. The plasmonic photocatalysis process will be explored via surface plasmon resonance effect (SPR) exhibited by silver nanoparticles (Ag-NPs) grown on the glass surface substrate through Na+«Ag+ ionic exchange followed by controlled thermal treatment. Due to the strong coordination and affinity between groups containing sulfur and nitrogen atoms (such as cyano and thiol) with Ag, the challenge of this project is on the study and understanding of photocatalysis processes that use the SPR effect from Ag-NPs, along with the glass chemical composition, on degradation of organic molecules anchored to Ag on glass surface. Such degradation will be monitored via SERS spectroscopy by studying the Raman scattering bands of the target molecules at low concentration and belonging to emerging pollutant groups. (AU)