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Abstract
Green synthesis of γ-Gd2S3 nanoparticles was carried out using low-temperature hydrothermal route in autoclave. A 1:1 mixture of ionic liquid 1-ethyl-3-methylimidazolium ethyl sulfate, ([EMIM][EtSO4]), and water was used as a solvent. Synthesized nanoparticles were characterized by x-ray powder diffraction (XRPD), scanning electron microscopy (SEM), UV–visible spectroscopy (UV–vis), particle size by dynamic light scattering (DLS) technique, and photoluminescence (PL) studies. XRPD suggests cubic Th3P4-type structure for obtained Gd2S3 nanoparticles. The size of synthesized nanoparticles is about 86 nm. Optical band gap for these nanoparticles estimated from electronic spectrum is 2.95 eV which shows blue shift from values reported for bulk Gd2S3 due to pronounced quantum mechanical effect. These nanoparticles show sharp emission peak at 385 nm and a broad shoulder at 475 nm when excited at 260 nm.
Highlights
Synthesis and characterization of rare earth chalcogenides have attracted considerable attention of researchers due to their excellent properties and wide applications in various technological areas, such as optical devices, electrical, So far, researchers have not paid enough attention to the synthesis of these sesquisulfides at nanoscale. Wang et al (2005) have successfully synthesized c-Gd2S3 by ultrasonic spray pyrolysis
Synthesized nanoparticles were characterized by x-ray powder diffraction (XRPD), scanning electron microscopy (SEM), UV–visible spectroscopy (UV–vis), particle size by dynamic light scattering (DLS) technique, and photoluminescence (PL) studies
We report simple ionic liquid-assisted hydrothermal synthesis of unique Gd2S3 nanoflowers
Summary
Synthesis and characterization of rare earth chalcogenides have attracted considerable attention of researchers due to their excellent properties and wide applications in various technological areas, such as optical devices, electrical, So far, researchers have not paid enough attention to the synthesis of these sesquisulfides at nanoscale. Wang et al (2005) have successfully synthesized c-Gd2S3 by ultrasonic spray pyrolysis. Synthesized nanoparticles were characterized by x-ray powder diffraction (XRPD), scanning electron microscopy (SEM), UV–visible spectroscopy (UV–vis), particle size by dynamic light scattering (DLS) technique, and photoluminescence (PL) studies. XRPD suggests cubic Th3P4-type structure for obtained Gd2S3 nanoparticles. Optical band gap for these nanoparticles estimated from electronic spectrum is 2.95 eV which shows blue shift from values reported for bulk Gd2S3 due to pronounced quantum mechanical effect.
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