a kind of yb 3+ Ion-activated near-infrared luminescent vanadosilicate material and its preparation method and application
A vanadium silicate, near-infrared technology, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., to achieve the effects of stable performance, good chemical and thermal stability, and low production costs
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Embodiment 1
[0037] Preparation of La 7.7 Yb 3.3 SiV 3 o 26
[0038] According to the chemical formula La 7.7 Yb 3.3 SiV 3 o 26 The stoichiometric ratio of each element in , respectively weighed lanthanum oxide La 2 o 3 : 2.5087 g, ytterbium oxide Yb 2 o 3 : 1.3004 g, vanadium pentoxide V 2 o 5 : 0.5460 g, silicon dioxide SiO 2 : 0.1202 g, ground in an agate mortar and mixed uniformly, pre-calcined in an air atmosphere at 420° C. for 10 hours in a muffle furnace, then cooled to room temperature, and the sample was taken out. Mix and grind the mixture thoroughly again, calcinate in the air atmosphere at 1050°C for 2 hours, cool to room temperature, take it out and grind it sufficiently to obtain powdered vanadosilicate that can realize near-infrared luminescence under the excitation of ultraviolet light Material.
[0039] See attached figure 1 , which is the X-ray powder diffraction pattern of the sample prepared by the technical scheme of this embodiment, the XRD test resul...
Embodiment 2
[0044] Preparation of La 10.989 Yb 0.011 SiV 3 o 26
[0045] According to the chemical formula La 10.989 Yb 0.011 SiV 3 o 26 The stoichiometric ratio of each element in , respectively weighed lanthanum oxide La 2 o 3 : 3.5803 g, ytterbium carbonate Yb 2 (CO 3 ) 3 : 0.0058 g, ammonium metavanadate NH 4 VO 3 : 0.7019 g, silicon dioxide SiO 2 : 0.1202 g, ground in an agate mortar and mixed evenly, pre-sintered at 500° C. for 6 hours in an air atmosphere in a muffle furnace, then cooled to room temperature, and took out the sample. Mix and grind the mixture thoroughly again, calcinate in the air atmosphere at 950°C for 4 hours, cool to room temperature, take it out and grind it sufficiently to obtain powdered vanadosilicate that can realize near-infrared luminescence under the excitation of ultraviolet light Material.
[0046] Its main structure, excitation spectrum, and emission spectrum are similar to those of Example 1.
Embodiment 3
[0048] Preparation of La 10.945 Yb 0.055 SiV 3 o 26
[0049] According to the chemical formula La 10.945 Yb 0.055 SiV 3 o 26 The stoichiometric ratio of each element in , respectively weighed lanthanum carbonate La 2 (CO 3 ) 3 : 5.0112 g, ytterbium carbonate Yb 2 (CO 3 ) 3 : 0.02893 g, vanadium pentoxide V 2 o 5 : 0.5460 g, silicon dioxide SiO 2 : 0.1202 g, ground and mixed in an agate mortar, pre-sintered at 600° C. for 4 hours in an air atmosphere in a muffle furnace, then cooled to room temperature, and the sample was taken out. Fully mix and grind the mixture again, calcinate at 870°C for 6 hours in an air atmosphere, cool to room temperature, take it out and grind it fully to obtain powdered vanadosilicate that realizes near-infrared luminescence under the excitation of ultraviolet light Material.
[0050] Its main structure, excitation spectrum, and emission spectrum are similar to those of Example 1.
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