Preparation method and application of fe3o4/sio2gd2o3:eu, Bi magnetic-fluorescence nanomaterials
A technology of fluorescent nanomaterials and magnetism, applied in the direction of luminescent materials, applications, chemical instruments and methods, etc., can solve the problems of application of magnetic nanomaterials, toxicity and potential environmental hazards, low fluorescence intensity, etc. Achieve the effects of simple preparation method, stable properties and high sensitivity
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Embodiment 1
[0027] Fe is prepared in this example 3 o 4 / SiO 2 Gd 2 o 3 : Eu, the method for Bi magnetic-fluorescent nano-material comprises the following steps:
[0028] Step 1: Take 60mL of deionized water and add it to a 150mL three-neck flask, stir with argon to remove oxygen for 30 minutes, and weigh 1.7g of FeCl 3 ·6H 2 O with 3.24g FeSO 4 ·7H 2 O was added to the three-necked flask according to the mass ratio of 1:1.9, mechanically stirred, the stirring speed was 500 rpm, and the dissolution was accelerated to obtain a solution with a solid-to-liquid ratio of 0.082g / mL, heated to 60°C, and 8mL of concentrated ammonia water was added, Adjust the pH of the solution to 9~10, stir and react for 30 minutes, raise the reaction temperature to 80°C, age for 30 minutes, naturally cool to room temperature, and separate the obtained substance with a magnet, wash three times with deionized water, and then wash with absolute ethanol Three times, put it in a vacuum drying oven and dry it...
Embodiment 2
[0033] Fe is prepared in this example 3 o 4 / SiO 2 Gd 2 o 3 : Eu, the method for the magnetic-fluorescence nanomaterial of Bi comprises the following steps:
[0034] Step 1: Take 61.5mL of deionized water and add it to a 150mL three-neck flask, stir with argon to remove oxygen for 30 minutes, and weigh 1.80g of FeCl 3 ·6H 2 O with 3.24g FeSO 4 ·7H 2 O was added to the three-necked flask according to the molar ratio of 1:1.8, mechanically stirred, the stirring speed was 500 rpm, and the dissolution was accelerated to obtain a solution with a solid-to-liquid ratio of 0.082g / mL, heated to 60°C, and 6mL of concentrated ammonia water was added, Regulate the pH of solution to be 9, other operation of this step is identical with embodiment 1, obtains Fe 3 o 4 magnetic nanoparticles;
[0035] Step 2: Weigh 0.174g Fe in step 1 3 o 4 The magnetic nanoparticles are placed in an ethanol aqueous solution with a volume concentration of 50%, ultrasonically dispersed for 10 minute...
Embodiment 3
[0039] Fe is prepared in this example 3 o 4 / SiO 2 Gd 2 o 3 : Eu, the method for the magnetic-fluorescence nanomaterial of Bi comprises the following steps:
[0040] Step 1: Take 59mL of deionized water and add it to a 150mL three-neck flask, stir with argon to remove oxygen for 30 minutes, and weigh 1.62g of FeCl 3 ·6H 2 O with 3.24g FeSO4 7H 2 O was added to the three-necked flask according to the mass ratio of 1:2, mechanically stirred, the stirring speed was 500 rpm, and the dissolution was accelerated to obtain a solution with a solid-to-liquid ratio of 0.082g / mL, heated to 60°C, and 9mL of concentrated ammonia water was added, Regulating the pH of solution is 10, and other operation of this step is identical with embodiment 1, obtains Fe 3 o 4 magnetic nanoparticles;
[0041] Step 2: Weigh 0.174g Fe in step 1 3 o 4Magnetic nanoparticles were placed in an ethanol solution with a volume concentration of 50%, ultrasonically dispersed for 10 minutes to obtain a so...
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