Green hydrothermal synthesis and optical properties of γ-Gd2S3 nanoparticles

Abstract

Green synthesis of c-Gd 2 S 3 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 Th 3 P 4 -type structure for obtained Gd 2 S 3 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 Gd 2 S 3 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.

Zinc solubilizing plant growth promoting microbes produce zinc nanoparticles

“…Highest zeta potential of +179.10 mV was observed for the particle size 106.0 nm produced by B116 indicating best stability. However, nanoparticles with zeta potential values greater than +25mV and -25mV typically are stable (Sonika et al, 2015). Hence, it could be inferred that the nanoparticles produced with lower zeta potentials such as +0.5mV may not be stable even though they are only 52 nm.…”

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

“…Several RE 3+ -doped binary and ternary fluorides nanoparticles have been synthesized by Ghosh and coworkers using the IL-assisted solvothermal method (Ghosh et al, 2011;Ghosh and Mudring, 2016;Ghosh et al, 2017 (Liu et al, 2020). γ-Gd 2 S 3 nanoparticles are prepared using 1ethyl-3-methylimidazolium ethyl sulfate ([C 2 mim][EtSO 4 ]) ILbased hydrothermal method, which leads to nanoflower morphology (Khajuria et al, 2016 (Tian et al, 2012;Tian et al, 2014).…”

Preparation and application of rare earth sulfides

“…Adhikary等 [77] 将前驱体Ln(acda) 3 (phen)直接在氩 图 10 不同形貌: 片状 [48] (a)、板状 [52] (b)、矩形棒状 [58] (c)、 线束状 [74] (d)稀土硫化物的扫描电子显微镜图(网络版彩图) 全取代无机颜料 [81,82] . 传统无机颜料多含有镉、铅等 有毒有害元素, 如硒化镉、铬酸铅和钒酸铋 .…”

“…[155~157] 、光学材 料 [23,51,52,74] 等方面. 如Matsuoka等 [155] 研究了Y和Gd替 代对SmPd 3 S 4 和TbPd 3 S 4 磁性能的影响, 随着Y(Gd)浓 度的增加, Sm 1−x T x Pd 3 S 4 和Tb 1−x T x Pd 3 S 4 (T=Y或Gd)的 反铁磁(AFM)转变温度单调下降(增加).…”

“…Figure10SEM of rare earth sulfide with different morphologies. (a) Flake-like[48], (b) plate-like[52], (c) rectangular rod[58] and (d) wire bundling[74] (color online).…”