Article ID Journal Published Year Pages File Type
5367412 Applied Surface Science 2011 7 Pages PDF
Abstract

Sphere-like CuGaS2 nanoparticles were successfully synthesized by a simple biomolecule-assisted solvothermal route using a mixed solution compose of ethylenediamine and distilled water (1:1, v/v), in which l-cystine was used as the sulfide source and complexing molecule. Phase analysis was carried out by X-ray diffraction (XRD) and the results confirmed the as-prepared CuGaS2 as a single-phase tetragonal structure. Field-emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) showed that the morphologies of CuGaS2 were sphere-like nanoparticles in shape, and the average diameters was about 600 nm. X-ray photoelectron spectrum (XPS) was used to analyze the composition of CuGaS2 and the ratio of Cu/Ga/S is 1:0.97:1.98. Raman spectrum of the obtained CuGaS2 exhibit a high-intensity peak of the A1 mode at 305 cm−1. The influence of reaction temperature, time and solvent was initially investigated. The possible formation mechanism was also discussed.

• We report for the first time a simple biomolecule-assisted solvothermal route using l-cystine as sulfur source and complexing agent to synthesis CuGaS2 crystals. • The possible mechanisms leading to sphere-like CuGaS2 nanoparticles were proposed. • Morphology, structure, phase composition and optical property of the as-prepared CuGaS2 products were investigated in detail.

Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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