Mesoporous core-shell phosphor and liquid phase preparation method
A fluorescent powder, core-shell technology, applied in the field of mesoporous core-shell materials and preparation, to achieve uniform particle size, high luminous intensity, and good dispersion
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Embodiment 1
[0030] (1) Co-precipitation method to generate YOHCO 3 F: Yb / Er precursor. First, 1mol / L of Ln(NO 3 ) 3 The solution is Ln 2 o 3 (99.99%) placed in HNO 3 Dissolve in , heat to remove excess HNO 3 and diluted with deionized water. 1mL of Ln(NO 3 ) 3 (Ln=89%Y / 10%Yb / 1%Er) was added to 50ml of deionized water, then 3g of urea, and then 0.1g of KF. After fully stirring until the solution is uniform, the packaged beaker is placed in a water bath at 90°C for 3 hours without stirring. After the reaction was completed, the obtained product was centrifuged.
[0031] (2) Formation of YOF:Yb / Er@mSiO by sol-gel method 2 . First, the YOHCO 3 F: The Yb / Er precursor was calcined in air at 500°C for 3 hours to generate YOF:Yb / Er. SiO 2 The coating preparation method uses a typical method generation. The synthesized YOF:Yb / E sample was dissolved in 50mL of deionized water and 70mL of ethanol, and after ultrasonication until uniform, 0.3g of CTAB, 0.3mL of TEOS, and 1mL of conc...
Embodiment 2
[0033] (1) Co-precipitation method to generate YOHCO 3 F: Yb / Ho precursor. First, 1mol / L of Ln(NO 3 ) 3 The solution is Ln 2 o 3 (99.99%) placed in HNO 3 Dissolve in , heat to remove excess HNO 3 and diluted with deionized water. 1mL of Ln(NO 3 ) 3 (Ln=89%Y / 10%Yb / 1%Ho) was added to 50ml of deionized water, then 3g of urea, and then 0.1g of KF. After fully stirring until the solution is uniform, the packaged beaker is placed in a water bath at 90°C for 3 hours without stirring. After the reaction was completed, the obtained product was centrifuged.
[0034] (2) Generate YOF:Yb / Ho@mSiO by sol-gel method 2 . First, the YOHCO 3 F: The Yb / Ho precursor was calcined in air at 500 °C for 3 hours to generate YOF:Ln. SiO 2 The coating preparation method uses a typical method generation. The synthesized YOF:Yb / Ho sample was dissolved in 50mL of deionized water and 70mL of ethanol, and after ultrasonication until uniform, 0.3g of CTAB, 0.3mL of TEOS, and 1mL of concentra...
Embodiment 3
[0036] (1) Co-precipitation method to generate YOHCO 3 F: Yb / Tm precursor. First, 1mol / L of Ln(NO 3 ) 3 The solution is Ln 2 o 3 (99.99%) placed in HNO 3 Dissolve in , heat to remove excess HNO 3 and diluted with deionized water. 1mL of Ln(NO 3 ) 3 (Ln=79.7%Y / 20%Yb / 0.3%Tm) was added to 50ml of deionized water, then 3g of urea, and then 0.1g of KF. After fully stirring until the solution is uniform, the packaged beaker is placed in a water bath at 90°C for 3 hours without stirring. After the reaction was completed, the obtained product was centrifuged.
[0037] (2) Formation of YOF:Yb / Tm@mSiO by sol-gel method 2 . First, the YOHCO 3 The F:Yb / Tm precursor was calcined in air at 500°C for 3 hours to generate YOF:Yb / Tm. SiO 2 The coating preparation method uses a typical method generation. The synthesized YOF:Yb / Tm sample was dissolved in 50mL of deionized water and 70mL of ethanol, and after ultrasonication until uniform, 0.3g of CTAB, 0.3mL of TEOS, and 1mL of ...
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