Cr<3+> and Bi<3+> double-doped gallate long-afterglow fluorescent powder material as well as preparation method and application thereof
A long-lasting phosphor and gallate technology, which is applied in the field of biomedical imaging, achieves deep penetration, uniform appearance, and is conducive to large-scale industrial promotion and application
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Embodiment 1
[0026] 1) According to the target product chemical formula Zn 0.97 Ga 1.97 o 3.97 :0.01Cr3+ ,0.02Bi 3+ stoichiometric ratio, accurately weigh the following raw materials: 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.031mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.02mmol Bi(NO 3 ) 3 ·5H 2 O.
[0027] 2) The above raw materials were dissolved in 15 mL of deionized water and stirred for 30 min, and then tert-butylamine was added to adjust the pH of the solution to 9. Mix 2 mL of oleic acid with 20 mL of toluene to obtain an organic mixed solution, which is then mixed with the prepared alkaline reaction solution. The mixture thus obtained was transferred to a 50 mL stainless steel autoclave and heated to 150° C. for 20 h. After the system is cooled to room temperature, excess ethanol is added to precipitate the nanoparticles from the synthesis solution, and the solid product obtained by centrifugation is washed and dried, which is the target phosphor sample Zn 0.97...
Embodiment 2
[0036] Embodiment 2 is substantially the same as Embodiment 1, the difference is: Bi 3+ The doping amount is 1%, that is, the raw material is adjusted to 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.041mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.01mmolBi(NO 3 ) 3 ·5H 2 O. The target phosphor sample thus prepared is Zn 0.97 Ga 1.98 o 3.97 :0.01Cr 3+ ,0.01Bi 3+ .
Embodiment 3
[0038] Embodiment 3 is substantially the same as Embodiment 1, the difference is: Bi 3+ The doping amount is 3%, that is, the raw material is adjusted to 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.021mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.03mmolBi(NO 3 ) 3 ·5H 2 O. The target phosphor sample thus prepared is Zn 0.97 Ga 1.96 o 3.97 :0.01Cr 3+ ,0.03Bi 3+ .
[0039] For fully understanding the performance of the fluorescent powder product that the present invention makes, carried out corresponding test respectively, specifically as follows:
[0040] 1. Diffuse reflectance spectrum test
[0041] Place the sample to be tested in the ultraviolet light (Ultraviolet Rays, UV) of 300W xenon lamp to excite for 5 minutes, with BaSO 4 As a reference standard, diffuse reflectance spectra were measured using a Cary 5000 UV-Vis-NIR spectrophotometer equipped with a double off-surface Littrow monochromator. Wherein the ZGO:0.01Cr prepared by embodiment 1 3+ ,0.02Bi...
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