Rare earth-doped NaYF4/Au@CdS composite photocatalyst and preparation method thereof
A rare earth doping, composite light technology, applied in the field of photocatalysis, to achieve the effect of excellent catalytic performance
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[0028] Example 1
[0029] NaYF 4 :Yb 3+ / Er 3+ / Au@CdS composite photocatalyst preparation:
[0030] (1) Preparation of NaYF 4 :Yb 3+ / Er 3+ Microsphere:
[0031] Under the conditions of a temperature of 60℃ and a stirring speed of 300r / min, 1.408mmol Y(NO 3 ) 3 • 6H 2 O,0.16mmol Yb(NO 3 ) 3 • 5H 2 O, 0.032mmol Er(NO 3 ) 3 • 5H 2 O is dissolved in 20mL water; 1.6mmol EDTA is dissolved in 20mL water; 14.4mmol NaF is dissolved in 20mL water, mix the above rare earth nitrate solution, surfactant and fluorine source solution and continue to stir for 1 hour to form a reaction precursor solution; The obtained precursor liquid was transferred into a sealed 100mL polytetrafluoroethylene lined reactor, heated to 180°C for 3h; cooled to room temperature, washed with deionized water and absolute ethanol for 3 times, centrifuged to collect the precipitate, NaYF can be obtained by vacuum drying at 60℃ 4 :Yb 3+ / Er 3+ Microsphere
[0032] (2) Preparation of NaYF 4 :Yb 3+ / Er 3+ / Au composite mate...
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[0039] Example 2:
[0040] NaYF 4 :Yb 3+ / Er 3+ / Au@CdS composite photocatalyst preparation:
[0041] (1) Preparation of NaYF 4 :Yb 3+ / Er 3+ Microsphere:
[0042] Under the conditions of a temperature of 50℃ and a stirring speed of 100r / min, 1.408mmol Y(NO 3 ) 3 • 6H 2 O,0.28mmol Yb(NO 3 ) 3 • 5H 2 O, 0.141mmol Er(NO 3 ) 3 • 5H 2 O was dissolved in 20mL water; 1.4mmol sodium citrate was dissolved in 20mL water; after 20mmol NaF was dissolved in 20mL water, the above rare earth nitrate solution, surfactant and fluorine source solution were mixed and stirred for 1 hour to form a reaction precursor solution; Transfer the obtained precursor solution into a sealed 100mL polytetrafluoroethylene lined reactor, heat up to 160℃, keep for 2h; cool to room temperature, wash with deionized water and absolute ethanol for 3 times, and collect the precipitate by centrifugation , NaYF can be obtained by vacuum drying at 60℃ 4 :Yb 3+ / Er 3+ Microsphere
[0043] (2) Preparation of NaYF 4 :Yb 3+ / Er ...
Example Embodiment
[0049] Example 3:
[0050] NaYF 4 :Yb 3+ / Er 3+ / Au@CdS composite photocatalyst preparation:
[0051] (1) Preparation of NaYF 4 :Yb 3+ / Er 3+ Microsphere:
[0052] Under the conditions of a temperature of 70℃ and a stirring speed of 500r / min, 1.408mmol Y(NO 3 ) 3 • 6H 2 O,0.08mmol Yb(NO 3 ) 3 • 5H 2 O, 0.0141mmol Er(NO 3 ) 3 • 5H 2 O is dissolved in 20mL water; 1.5mmol EDTA is dissolved in 20mL water; 6mmol NaF is dissolved in 20mL water, mix the above rare earth nitrate solution, surfactant solution and fluorine source solution and continue stirring for 1 hour to form a reaction precursor solution; The obtained precursor liquid was transferred into a sealed 100mL polytetrafluoroethylene lined reactor, heated to 170℃, kept for 6h; cooled to room temperature, washed with deionized water and absolute ethanol for 3 times, centrifuged to collect the precipitate, NaYF can be obtained by vacuum drying at 60℃ 4 :Yb 3+ / Er 3+ Microsphere
[0053] (2) Preparation of NaYF 4 :Yb 3+ / Er 3+ / Au ...
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