Controlled synthesis of monodispersed AgGaS{sub 2} 3D nanoflowers and the shape evolution from nanoflowers to colloids

Journal Article · Sun May 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.03.022· OSTI ID:21504069

Yuan, Yanping; Zai, Jiantao ^[1]; Su, Yuezeng ^[2]; Qian, Xuefeng ^[1]

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1. School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240 (China)
2. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240 (China)

Monodispersed AgGaS{sub 2} three-dimensional (3D) nanoflowers have been successfully synthesized in a 'soft-chemical' system with the mixture of 1-octyl alcohol and cyclohexane as reaction medium and oleylamine as surfactant. The crystal phase, morphology and chemical composition of the as-prepared products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HTEM), respectively. Results reveal that the as-synthesized AgGaS{sub 2} nanoflowers are in tetragonal structure with 3D flower-like shape. Controlled experiments demonstrated that the shape transformation of AgGaS{sub 2} nanocrystals from 3D nanoflowers (50 nm) to nanoparticles (10-20 nm) could be readily realized by tuning the reaction parameters, e.g., the ratio of octanol to cyclohexane, the length of carbon chain of fatty alcohol, the concentration of oleylamine, etc. The UV-vis and PL spectra of the obtained AgGaS{sub 2} nanoflowers and colloids were researched. In addition, the photoelectron energy conversion (SPV) of AgGaS{sub 2} nanoflowers was further researched by the surface photovoltage spectra. -- Graphical abstract: Various AgGaS{sub 2} nanocrystals with different morphologies and sizes including 3D nanoflowers (a) and colloids (b) were synthesized in mixed solvent reaction system and their PL spectra was researched (c). Display Omitted highlights: > Ternary chalcogenide AgGaS{sub 2} nanocrystals were synthesized in a simple mixed solvent system. > The shape and size transformation of AgGaS{sub 2} from 3D nanoflowers to colloids could be tuned effectively. > AgGaS{sub 2} nanoflowers was obtained with relatively insufficient ligands protection in reaction system, otherwise, AgGaS{sub 2} colloids was obtained. > Provide a new choice to prepare ternary nanomaterials and further understand the reaction mechanisms along with the growth kinetics of ternary nanocrystals.

• OSTI ID: 21504069
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 5 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALCOHOLS
ALKANES
CARBON
CHALCOGENIDES
CHEMICAL COMPOSITION
COHERENT SCATTERING
COLLOIDS
CRYSTALS
CYCLOALKANES
CYCLOHEXANE
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
ELEMENTS
GALLIUM COMPOUNDS
GALLIUM SULFIDES
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
LIGANDS
MICROSCOPY
MIXED SOLVENTS
MIXTURES
MORPHOLOGY
NANOSTRUCTURES
NONMETALS
OCTANOLS
ORGANIC COMPOUNDS
REACTION KINETICS
SCATTERING
SILVER COMPOUNDS
SOLVENTS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
SURFACES
SURFACTANTS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION