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Plasmonic photocatalysis: development of silver nanoparticles/TiO2 nanohybrids for industrial waste photodegradation

Grant number: 20/03388-3
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2020
Effective date (End): October 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Diogo Silva Pellosi
Grantee:Pedro de Souza Ono
Home Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil

Abstract

The industrial expansion promoted by man polluted natural sources of water through the generation and disposal of waste. In this scenario, Photocatalysis is a promising alternative in the treatment of these residues, however the current photocatalysts (usually metal oxides such as TiO2) preset some drawbacks as low efficiency and absorb light only in the UV region of the electromagnetic spectrum. In this sense, the present project aims to synthesize nanohybrids based on silver nanoparticles (AgNP) supported on TiO2 as a photocatalyst for the degradation of organic dyes (industrial effluent model). The proposed system has the advantages of presenting light absorption in the UV/visible regions of the spectrum (wide application), being poorly soluble in water and a slow electron recombination, which increase its efficiency. In this way, the present project seeks through rational design based on nanotechnology the synthesis and morphological, structural, photophysical characterization of AgNP/TiO2 nanohybrids. The relationship between the structural optimization of the AgNP/TiO2 nano-hybrid and its catalytic power will be the guiding question of this project. (AU)

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