Transmission electron micrograph of <i>R. mucilaginosa</i> sections.

<p>(A) Control (without copper) and (B) Section of the yeast showing intracellular localization of copper NPs (arrow).</p

SEM-EDS analysis of the surface of dead biomass of <i>R. mucilaginosa</i>.

<p>(A) Before adsorption of copper ion and (B) after adsorption of copper ion.</p

Adsorption isotherm parameters for Cu (II) ions with live and dead biomass of <i>R. mucilaginosa</i>.

<p>Adsorption isotherm parameters for Cu (II) ions with live and dead biomass of <i>R. mucilaginosa</i>.</p

EDS spectra of dead biomass of <i>R. mucilaginosa</i>.

<p>(A) before exposure to copper solution and (B) after exposure to the metal confirming the presence of copper.</p

First and second-order adsorption rate constants.

<p>First and second-order adsorption rate constants.</p

Photoelectroactivity of Bismuth Vanadate Prepared by Combustion Synthesis: Effect of Different Fuels and Surfactants

The bismuth vanadate (BiVO4) is a semiconductor that has attracted much attention due to the photocatalytic efficiency in the visible light region. The objective of this work was to synthesize monoclinic BiVO4 by solution combustion synthesis, with different surfactants and fuels and apply it as photoelectrodes. The characterization by infrared spectroscopy and Raman spectroscopy showed that all samples showed characteristic bands of the monoclinic structure BiVO4. The samples synthesized with glycine and glycine/Tween (R) 80 had V2O5. The film obtained from the alanine/Tween (R) 80 showed highest photocurrent values, which may be related to smaller size particles (200 to 300 nm) observed by scanning electron microscopy images. The films obtained using alanine showed highest values of rate constant reaction and percentage discoloration of methylene blue.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

TEM micrographs of <i>H. lixii</i> sections.

<p>(A) Control (without copper), (B) Section of the fungus showing extracellular localization of copper nanoparticles and (C) Copper nanoparticles.</p