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Preparation method of lanthanum doped bismuth phosphate photocatalyst

A photocatalyst and bismuth phosphate technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems that lanthanum-doped bismuth phosphate is rare and the research is not very sufficient, and achieve low cost, The effect of short time and simple operation

Inactive Publication Date: 2016-04-20
ENVIRONMENTAL MANAGEMENT COLLEGE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the method of preparing photocatalysts by doping bismuth phosphate with metal elements is not very sufficient, and lanthanum doped bismuth phosphate is relatively rare.

Method used

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  • Preparation method of lanthanum doped bismuth phosphate photocatalyst
  • Preparation method of lanthanum doped bismuth phosphate photocatalyst
  • Preparation method of lanthanum doped bismuth phosphate photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment 1: step 1, take by weighing 3.17g bismuth phosphate pentahydrate and dissolve in 20mL concentration of 1mol / L nitric acid aqueous solution, fully stir and dissolve for 30min to obtain solution A; weigh 0.029g hexahydrate lanthanum nitrate and dissolve in 8mL water to obtain Solution B; add 2.0 mL tributyl phosphate to solution B to obtain solution C; add solution A dropwise to solution C and continue stirring for 30 minutes to obtain solution E.

[0017] Step 2, transfer the solution E to a 50mL high-pressure reactor, and conduct a hydrothermal reaction at 200°C for 3 hours. After the reaction, cool to room temperature; filter and separate the obtained product, then wash it with distilled water until it is neutral, and wash the precipitated product with ethanol. Once, dry at 85°C for 12 hours to obtain a lanthanum-doped bismuth phosphate photocatalyst.

Embodiment 2

[0018] Embodiment 2: Step 1, take by weighing 3.14g bismuth phosphate pentahydrate and dissolve in 40mL concentration of 0.5mol / L nitric acid aqueous solution, fully stir and dissolve for 30min to obtain solution A; weigh 0.057g lanthanum nitrate hexahydrate and dissolve in 18mL water, Obtain solution B; add 2.0mL tributyl phosphate to solution B to obtain solution C; add solution A dropwise to solution C and keep stirring for 30min to obtain solution E.

[0019] Step 2, transfer the solution E to a 100mL high-pressure reactor, and conduct a hydrothermal reaction at 200°C for 3 hours. After the reaction, cool to room temperature; filter and separate the obtained product, then wash it with distilled water until it is neutral, and wash the precipitated product with ethanol. Once, dry at 85°C for 12 hours to obtain a lanthanum-doped bismuth phosphate photocatalyst.

[0020] Such as figure 1 Shown is the SEM picture of the lanthanum-doped bismuth phosphate prepared in this exampl...

Embodiment 3

[0022] Embodiment 3: step 1, take by weighing 3.04g bismuth phosphate pentahydrate and dissolve in 40mL concentration and be 0.5mol / L nitric acid aqueous solution, fully stir and dissolve for 30min, obtain solution A; Weigh 0.143g lanthanum nitrate hexahydrate and dissolve in 18mL water, obtain Solution B; add 2.0 mL tributyl phosphate to solution B to obtain solution C; add solution A dropwise to solution C and continue stirring for 30 minutes to obtain solution E.

[0023] Step 2, transfer the solution E to a 100mL high-pressure reactor, and conduct a hydrothermal reaction at 200°C for 3 hours. After the reaction, cool to room temperature; filter and separate the obtained product, then wash it with distilled water until it is neutral, and wash the precipitated product with ethanol. Once, dry at 85°C for 12 hours to obtain a lanthanum-doped bismuth phosphate photocatalyst.

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Abstract

The invention discloses a preparation method of a lanthanum doped bismuth phosphate photocatalyst. The method comprises the steps that bismuth phosphate pentahydrate is dissolved in an aqueous nitric acid solution, and a solution A is obtained; lanthanum nitrate hexahydrate is dissolved in water, and a solution B is obtained; a phosphorus source compound is added to the solution B, and a solution C is obtained; the solution A is added dropwise to the solution C and stirred continuously, and a solution E is obtained; the solution E is transferred to a reaction kettle for a hydrothermal reaction, and a product is cooled to the room temperature after the reaction is finished; a product is subjected to filtering and separation, a precipitation product is washed with distilled water and ethyl alcohol and dried, and the lanthanum doped bismuth phosphate photocatalyst is obtained. The lanthanum doped bismuth phosphate photocatalyst is prepared by one step on the basis of the low-temperature hydrothermal reaction. The preparation method is simple, low in cost and short in time, the product yield is high, the prepared lanthanum doped bismuth phosphate photocatalyst has high catalytic activity, and the degradation rate is as high as 95% when the photocatalyst is used for degrading a simulating dye after 90 min under an illumination condition.

Description

technical field [0001] The invention relates to a preparation process of nanometer materials, in particular to a preparation method of a bismuth phosphate photocatalyst. Background technique [0002] Due to its special structural characteristics and high chemical stability, bismuth phosphate can not only be used as photocatalyst, luminescent matrix material, organic reaction catalyst, etc., but also has potential application prospects in heat resistance and friction resistance. Bismuth phosphate has three crystal forms: monoclinic, monoclinic monazite and hexagonal. Hexagonal bismuth phosphate, as a luminescent host material doped with rare earth ions, has attracted much attention from researchers in the development of phosphors. Bismuth phosphate with monoclinic monazite structure has become a new star in the field of photocatalysis. However, bismuth phosphate-based photocatalysts have disadvantages such as low quantum efficiency and low solar energy utilization, which res...

Claims

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Application Information

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IPC IPC(8): B01J27/186
CPCB01J27/1815B01J27/186B01J35/39
Inventor 全玉莲
Owner ENVIRONMENTAL MANAGEMENT COLLEGE OF CHINA
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