title: Temperature and time dependence on ZnS microstructure and phases obtained through hydrothermal decomposition of diethyldithiocarbamate complexes.
abstract: Zinc sulphide was obtained through hydrothermal decomposition of [Zn(S2CNEt2)] under different experimental conditions such as temperatures and reaction times. Hydrothermal reactions were carried out in a stainless steel autoclave at 160, 180 and 200 °C for 3, 6 and 24 hours. The obtained products were characterized using X-ray diffraction, scanning and high resolution transmission electron microscopies. Particle size and microstrain were determined by Rietveld refinement of experimental X-ray diffraction patterns. The obtained crystal size values were in the range of 6.1 to 30 nm and as the temperature and reaction times increase the particle size also increases. Band gap values are in the range of 3.34 to 3.60 eV and are highly dependent on the crystal microstrain. The catalyst activities were studied through the degradation of methylene blue dye solutions under ultraviolet radiation.
authors.affiliation: Departamento de Química - Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, CEP 31270-901, MG, Brazil.
authors.forename: Guilherme Oliveira
authors.initials: GO
authors.lastname: Siqueira
authors.forename: Tulio
authors.initials: T
authors.lastname: Matencio
authors.forename: Herculano Vieira
authors.initials: HV
authors.lastname: da Silva
authors.forename: Yara Gonçalves
authors.initials: YG
authors.lastname: de Souza
authors.forename: José Domingos
authors.initials: JD
authors.lastname: Ardisson
authors.forename: Geraldo Magela
authors.initials: GM
authors.lastname: de Lima
authors.forename: Arilza
authors.initials: A
authors.lastname: de Oliveira Porto