Structural, chemical and optical properties of SnO 2 NPs obtained by three different synthesis routes

Autor: Grzegorz Gruzeł, Joanna Depciuch, Elżbieta Drzymała, Magdalena Parlinska-Wojtan, Andrzej Budziak, Andrzej Kowal
Rok vydání: 2017
Předmět:
Zdroj: Journal of Physics and Chemistry of Solids. 107:100-107
ISSN: 0022-3697
DOI: 10.1016/j.jpcs.2017.03.026
Popis: Polyol (P), chemical precipitation (C) and microwave-assisted (M) syntheses were chosen to produce SnO 2 nanoparticles with uniform size and minimum agglomeration. Their structural, chemical and optical properties were investigated using dynamic light scattering (DLS), scanning transmission electron microscopy (STEM), Raman, Fourier Transform Infrared (FTIR) using the Attenuated Total Reflectance (ATR) technique and Ultraviolet–Visible (UV–Vis) spectroscopies. STEM observations showed that the SnO 2 (P) and SnO 2 (C) nanoparticles (NPs) are combined into larger agglomerates with heterogeneous thickness, while the microwave-assisted NPs form a uniform thin layer across the TEM grid. The strongest agglomeration of the SnO 2 (C) NPs, observed by DLS, STEM and UV–Vis is explained by the very moderate amount of water present on the surface of the NPs identified by FTIR spectroscopy. High resolution STEM combined with SAED and X-ray diffraction (XRD) patterns confirmed the crystalline character of the NPs. In the nanoparticles from polyol synthesis, chlorine from the remains of metal precursors during reduction was detected by energy dispersive spectroscopy (EDS), contrary to the NPs obtained by the chemical precipitation and microwave-assisted methods. All three syntheses routes lead to small, 2–10 nm SnO 2 NPs, which were the result of the low concentration of Cl ions in the solutions.
Databáze: OpenAIRE
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