A kind of photocatalytic antibacterial material and preparation method thereof
An antibacterial material, photocatalytic technology, applied in chemical instruments and methods, botanical equipment and methods, physical/chemical process catalysts, etc. The effect of the surface quenching effect
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[0043] In yet another aspect, an embodiment of the present invention provides a method for preparing a heterogeneous structure photocatalytic antibacterial material, the method comprising the following steps:
[0044] Step (1): Prepare an up-conversion nanocrystal with a core-shell structure from acetates of at least two lanthanide metals, yttrium acetate, oleic acid, and octadecene, and perform ultrasonication on the up-conversion nanocrystal with a core-shell structure Treat and disperse in cyclohexane to obtain a cyclohexane solution of upconversion nanocrystals;
[0045] Step (2): stirring and mixing sodium citrate and soluble zinc salt, adding sodium hydroxide, and performing centrifugation to obtain a ZnO solid product, washing the ZnO solid product and dispersing it in ethanol to obtain an ethanol solution of ZnO;
[0046] Step (3): Mix the cyclohexane solution of the up-conversion nanocrystal in step (1) and the ethanol solution of ZnO in step (2), and then add ethanol...
Embodiment 1
[0064] Example 1: NaYF 4 :Yb,Tm,Nd@NaYF 4 : Preparation of Yb, Nd-ZnO Heterostructure Photocatalytic Antibacterial Material
[0065] Step (1): NaYF 4 :Yb,Tm,Nd@NaYF 4 : Preparation of Yb, Nd up-conversion nanocrystals:
[0066] NaYF 4 : Yb, Tm, Nd preparation:
[0067] Dissolve 0.735mmol yttrium acetate, 0.25mmol ytterbium acetate, 0.005mmol thulium acetate, and 0.01mmol neodymium acetate in a mixed solvent of 6mL oleic acid and 15mL octadecene, raise the temperature to 160°C, and stir magnetically for 1h. After cooling to room temperature, 10 mL of methanol solution (containing 2.5 mmol NaOH and 4 mmol NH 4 F), the temperature was raised to 50°C for 30 minutes with magnetic stirring, degassed for 15 minutes, then the temperature was raised to 320°C, and stirred for 1 hour. After the reaction, after washing and centrifuging, the obtained NaYF 4 : Microstructure of Yb, Tm, Nd such as figure 1 As shown, the fluorescence intensity changes as image 3 It was ultrasonical...
Embodiment 2
[0074] Example 2: NaYF 4 :Yb,Tm,Nd@NaYF 4 : Preparation of Yb, Nd-ZnO Heterostructure Photocatalytic Antibacterial Material
[0075] Step (1) and step (2) are the same as in Example 1, and step (3) adopts the production process of step (3) in Example 1, and the difference from step (3) in Example 1 is that the addition of the ethanol solution of ZnO The amount of 2mL remains unchanged, and 0.2mol / L NaYF-containing 4 :Yb,Tm,Nd@NaYF 4 : The addition amount of Yb, Nd cyclohexane solution was increased to 3mL. Get NaYF 4 :Yb,Tm,Nd@NaYF 4 : Yb, Nd-ZnO heterostructure photocatalytic antibacterial material, the morphology of the obtained product is as follows Figure 6 shown.
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