Plasmon-enhanced photocatalytic water purification.
Phys Chem Chem Phys
; 16(29): 15111-6, 2014 Aug 07.
Article
em En
| MEDLINE
| ID: mdl-24590124
ABSTRACT
Increasing water demand and water scarcity around the world requires the development of robust and efficient methods for water purification in the coming decades. Here, we report a photocatalytic water purification method using visible light (532 nm) utilizing 5 nm gold nanoparticles and their enhancement when attached on the surface of silica nanospheres as an inactive support to prevent nanoparticle coalescence or sintering. This is a non-toxic, low-cost, and easy photocatalytic process which provides high decomposition rates. Decomposition of the methyl orange dye is tested as a reaction model and trichloroethylene is selected as an example of a real water pollutant. When irradiated at their plasmon resonant frequency, the gold nanoparticles generate hydroxyl radicals that degradate organic pollutants into non-toxic molecules representing a basic mechanism of photocatalytic water purification.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Dióxido de Silício
/
Purificação da Água
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Nanopartículas Metálicas
/
Ouro
Idioma:
En
Revista:
Phys Chem Chem Phys
Assunto da revista:
BIOFISICA
/
QUIMICA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Espanha