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Preparation method for cadmium sulfide-loaded hexagonal-phase ytterbium-and-erbium-doped sodium yttrium tetrafluoride composite photocatalyst

A technology of sodium tetrafluoroyttrium and cadmium sulfide, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as cumbersome operation and difficulty in controlling the morphology of upconversion nanoparticles, and achieve technological Simple, short reaction time, low cost effect

Inactive Publication Date: 2017-07-21
HOHAI UNIV
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Problems solved by technology

β-NaYF 4 :Yb 3+ ,Tm 3+ The up-conversion luminescent material and N-doped P25 are tightly loaded on the surface of graphene at the same time, and a new type of nano-photocatalyst (Graphene supported NaYF 4 :Yb 3+ ,Tm 3+ and N doped P25nanocomposite as anadvancedNIR and sunlight driven upconversion photocatalyst), but there are cumbersome operations in these synthesis methods, and the shape of upconversion nanoparticles is difficult to control

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  • Preparation method for cadmium sulfide-loaded hexagonal-phase ytterbium-and-erbium-doped sodium yttrium tetrafluoride composite photocatalyst
  • Preparation method for cadmium sulfide-loaded hexagonal-phase ytterbium-and-erbium-doped sodium yttrium tetrafluoride composite photocatalyst
  • Preparation method for cadmium sulfide-loaded hexagonal-phase ytterbium-and-erbium-doped sodium yttrium tetrafluoride composite photocatalyst

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preparation example Construction

[0023] A preparation method of cadmium sulfide loaded hexagonal phase ytterbium and erbium-doped sodium tetrafluoroyttrium composite photocatalyst, comprising the steps of:

[0024] 1) Add 0.68mmolY (NO 3 ) 3 ·6H 2 O,0.2mmolYb(NO 3 ) 3 ·6H 2 O and 0.02mmolEr(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water and stirred for 30 min to obtain solution A;

[0025] 2) 2 mmol sodium citrate was dissolved in 15 mL deionized water to obtain solution B. Add solution B to A and stir for 30 minutes to finally obtain solution C;

[0026] 3) Dissolve 12mmol NaF in 15mL deionized water to obtain solution D, add solution D to C and continue to stir for 30min, then add it to a 50mL reaction kettle and heat it at 180°C for 18h, wash the obtained sample three times with deionized water and ethanol, and heat Dry for 12h to get NaYF in hexagonal phase 4 :Yb, Er;

[0027] 4) 50 mg of the prepared hexagonal phase NaYF 4 : Dissolve Yb, Er samples in 10mL ethanol solution, add 1mL ...

Embodiment 1

[0030] 1) Add 0.68mmolY (NO 3 ) 3 ·6H 2 O,0.2mmolYb(NO 3 ) 3 ·6H 2 O and 0.02mmolEr(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water and stirred for 30 min to obtain solution A;

[0031] 2) 2 mmol sodium citrate was dissolved in 15 mL deionized water to obtain solution B. Add solution B to A and stir for 30 minutes to finally obtain solution C;

[0032] 3) Dissolve 12mmol NaF in 15mL deionized water to obtain solution D, add solution D to C and continue to stir for 30min, then add it to a 50mL reactor and heat at 180°C for 18h. The obtained sample was washed three times with deionized water and ethanol, and dried at 80°C for 12 hours to obtain the hexagonal NaYF 4 :Yb, Er;

[0033] 4) 50 mg of the prepared hexagonal phase NaYF 4 : Dissolve Yb, Er samples in 10mL ethanol solution, add 1mL (0.2g / mL) PVP, ultrasonicate for 1h, add 10mg of pre-prepared CdS nanoparticles, stir for 1h, add to a 20mL reactor and heat at 160°C for 6h to obtain the final NaYF 4 : Yb...

Embodiment 2

[0036] 1) Add 0.68mmolY (NO 3 ) 3 ·6H 2 O,0.2mmolYb(NO 3 ) 3 ·6H 2 O and 0.02mmolEr(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water and stirred for 30 min to obtain solution A;

[0037] 2) 2 mmol sodium citrate was dissolved in 15 mL deionized water to obtain solution B. Add solution B to A and stir for 30 minutes to finally obtain solution C;

[0038] 3) Dissolve 12mmol NaF in 15mL deionized water to obtain solution D, add solution D to C and continue to stir for 30min, then add it to a 50mL reactor and heat at 180°C for 18h. The obtained sample was washed three times with deionized water and ethanol, and dried at 80°C for 12 hours to obtain the hexagonal NaYF 4 :Yb, Er;

[0039] 4) 50 mg of the prepared hexagonal phase NaYF 4 : Dissolve Yb and Er samples in 10mL ethanol solution, add 1mL (0.2g / mL) PVP, ultrasonicate for 1h, add 20mg of CdS nanoparticles prepared in advance, stir for 1h, add to 20mL reaction kettle and heat at 160℃ for 6h to obtain the fin...

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Abstract

The invention discloses a preparation method for a cadmium sulfide-loaded hexagonal-phase ytterbium-and-erbium-doped sodium yttrium tetrafluoride composite photocatalyst, belonging to the technical field of synthesis of nano-materials. The preparation method comprises the following steps: 1) dissolving Y(NO3)3.6H2O, Yb(NO3)3.6H2O and Er(NO3)3.6H2O in deionized water and carrying out stirring so as to obtain a solution A; 2) dissolving sodium citrate in deionized water so as to obtain a solution B, adding the solution B into the solution A and carrying out stirring so as to obtain a solution C; 3) dissolving NaF in deionized water so as to obtain a solution D, adding the solution D into the solution C, continuing stirring and then adding the obtained mixture into a reaction vessel for a hydrothermal reaction so as to obtain hexagonal-phase NaYF4: Yb, Er; and 4) dissolving NaYF4: Yb, Er in an ethanol solution, adding PVP, then carrying out ultrasonic treatment, adding CdS nanoparticles prepared in advance, carrying out stirring, adding the obtained mixture into the reaction vessel and carrying out a hydrothermal reaction so as to obtain the NaYF4: Yb, Er / CdS composite photocatalyst. The preparation method provided by the invention is simple in steps and prepares the NaYF4: Yb, Er / CdS composite photocatalyst via a hydrothermal process; the preparation method uses cheap and easily available raw materials, is simple in process, low in cost and short in reaction time, so energy consumption and reaction cost are reduced; and the preparation method is free of toxicity and harm, accords with requirements of environmental protection and has good practicality.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanometer materials, in particular to a preparation method of cadmium sulfide loaded hexagonal phase ytterbium and erbium doped sodium tetrafluoroyttrium composite photocatalyst. Background technique [0002] Since the 20th century, while enjoying the comfort and convenience brought by the rapid development of science and technology, human beings have also suffered from the deteriorating living environment caused by blindness and short-sightedness. Semiconductor photocatalysis has the advantages of strong oxidation, complete mineralization of pollutants, and direct use of sunlight. Great progress has been made in recent years. One of the goals of photocatalysis research is to use sunlight to achieve efficient photocatalysis. Therefore, improving the effective absorption and utilization of sunlight by photocatalysts is one of the effective ways to improve the efficiency of photocatalysis. How...

Claims

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Application Information

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IPC IPC(8): B01J27/125
CPCB01J27/125B01J35/39
Inventor 陆光华江润仁吴东海孙红伟但孝香杨皓涵
Owner HOHAI UNIV
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