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Publicação
Synthesis of nanocrystalline ZnS using biologically generated sulfide
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Orientador(es)
Resumo(s)
This work describes the synthesis of ZnS powders in high yield and via a straightforward process, under ambient
conditions (temperature and pressure), by adding to aqueous zinc (II) a nutrient solution containing
biologically generated sulfide from sulfate-reducing bacteria (SRB). The powders obtained as above were
composed mainly of ZnS (sphalerite) nanoparticles (NP's) exhibiting a spheroidal morphology (20–30 nm).
The NP's morphological properties and crystalline phase were not markedly altered by the SRB growth
media composition neither by the presence of bacterial cells. The relevance of this method to obtain ZnS
supported solid substrates has been demonstrated by performing the synthesis in the presence of TiO2 and
SiO2 submicron particles.
Descrição
Palavras-chave
Zinc sulfide Nanoparticles Sulfate-reducing bacteria Titanium dioxide Amorphous silica
Contexto Educativo
Citação
João Pinto da Costa, Ana Violeta Girão, J. P. Lourenço, O.C. Monteiro, Tito Trindade, Maria Clara Costa, Hydrometallurgy 117-118 (2012) 57