Record number :
Title of article :
Zn2x(CuIn)1−xS2 photocatalysts synthesis by a hydrothermal process using H4EDTA as complexing agent
Author/Authors :
Banica، نويسنده , , Radu and Nyari، نويسنده , , Terezia and Sasca، نويسنده , , Viorel، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
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Abstract :
The study of the Zn2x(CuIn)1−xS2 (0 ≤ x ≤ 1) solid solutions formation by hydrothermal synthesis using ethylenediaminetetraacetic acid (H4EDTA) as a complexant and surfactant agent is reported for the first time. Different synthesis parameters were varied: the H4EDTA concentration, the initial pH value, the Tu concentration, the duration and temperature of autoclaving process. The as obtained powders were characterized by X-ray powder diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and UV/vis/NIR diffuse reflection spectroscopy (DRS). The XRD and EDX results show that, with a careful adjustment of the reaction conditions, especially of the H4EDTA concentration and initial pH value of the precursor solution, a mixture of solid solutions with sphalerite type structure can be obtained, which transforms into a single phase solid solution after heat treatment. The particles, as revealed by SEM investigations, have nanoporous hexagonal microplates morphology, about 1 μm thick and several microns in diameter. The Cu0.159In0.111Zn1.778S2 photocatalyst obtained by this method presents photocatalytic activity for hydrogen evolution from aqueous solutions containing S2− ions as sacrificial agent, even without cocatalyst.
Keywords :
Hydrothermal method , Visible-light-driven photocatalyst , Hydrogen production
Journal title :
International Journal of Hydrogen Energy
Serial Year :
Link To Document :