Hydrothermal synthesis, characterization, and investigation of optical properties of Sb3+-doped lithium silicates nanoparticles

Abstract

The hydrothermal synthesis and optical properties of undoped and Sb 3+ -doped lithium metasilicate and lithium disilicate nanomaterials were investigated. The microstructures and morphologies of the synthesized Li 2−2x Sb 2x SiO 3 and Li 2−2x Sb 2x Si 2 O 5 nanoparticles were studied with powder X-ray diffraction and scanning electron microscopy techniques, respectively. The synthesized undoped and doped lithium metasilicate and lithium disilicate nanomaterials, respectively, are isostructural with the standard bulk Li 2 SiO 3 (space group Cmc2 1 ) and Li 2 Si 2 O 5 (space group Ccc2) materials. The electronic absorption and photoluminescence spectra of the synthesized materials are studied. The measured optical properties show dependence on the dopant amounts in the structure.

Hydrothermal synthesis and investigation of optical properties of Nb5+-doped lithium silicate nanostructures

“…Compared to the standard Microstructure analysis SEM images of the pure lithium metasilicate and lithium disilicate are present in our previous work [31]. Figure 4 shows typical SEM images of the synthesized Li (Fig.…”

“…Moreover, the formation of other phases of lithium silicates and raw materials was already detected for higher mol% concentration of the dopant agent in the reaction mixture (Figs. 2, 3) [31,41,42,48]. Tables 5 and 6 show the crystal sizes of the Nb-doped materials in different dopant amounts via Debye-Scherrer equation.…”

Lithium metasilicate and lithium disilicate nanomaterials: optical properties and density functional theory calculations

“…The synthesis procedures are reported previously [24]. Phase identifications were performed on a powder X-ray diffractometer Siemens D5000 (Siemens AG, Munich, Germany) using Cu-K α radiation.…”

“…Recently, we have reported the synthesis of highly crystalline and pure lithium metasilicate and lithium disilicate nanomaterials through a mild condition via hydrothermal method [24]. Herein, we will report the powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) analysis results in more details.…”

Part I: lithium metasilicate (Li2SiO3)—mild condition hydrothermal synthesis, characterization, and optical properties

“…However, most of the time, a mixture of Li 2 SiO 3 , Li 2 Si 2 O 5 , Li 4 SiO 4 , and SiO 2 was obtained [10,12,[15][16][17][18][19][20][21]. Recently, we have reported the synthesis of highly pure and crystalline lithium metasilicate nanomaterials through a mild condition hydrothermal method using lithium nitrate and silicic acid as raw materials at 1:2 Li:Si molar ratio [22,25]. In the present study, a hydrothermal route was successfully explored to synthesize nanostructured Li 2 SiO 3 powders in a hydrothermal system of LiNO 3 , SiO 2 , and NaOH.…”