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Preparation method and application of La/Bi2WO6 photocatalyst

A technology of photocatalyst and solution, which is applied in the field of preparation of La/Bi2WO6 photocatalyst, can solve the problems of poor photocatalytic performance of photocatalyst, residue of medicament ester-105, high preparation cost, etc., achieve enhanced photocatalytic performance, improved degradation rate, Effects with short compositing times

Inactive Publication Date: 2020-12-01
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide La / Bi 2 WO 6 The preparation method of photocatalyst, to solve the La / Bi that existing method makes 2 WO 6 Photocatalyst has poor photocatalytic performance and high preparation cost
[0007] Another object of the present invention is to provide La / Bi 2 WO 6 Application of photocatalyst to solve the problem of chemical ester-105 residue in mineral processing wastewater

Method used

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  • Preparation method and application of La/Bi2WO6 photocatalyst
  • Preparation method and application of La/Bi2WO6 photocatalyst
  • Preparation method and application of La/Bi2WO6 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] wt1.0%La / Bi 2 WO 6 Preparation of:

[0032] Step 1, take by weighing 0.035g of La(NO 3 ) 3 ·6H 2 O (according to La is the proportion of wt1.0%), add 10mL of absolute ethanol, 2mL of glacial acetic acid and 2mL of deionized water, fully stir to form a uniform, transparent A solution;

[0033] Step 2, 2.43g Bi(NO 3 ) 3 ·5H 2 O dissolved in 10mL 4mol / L HNO 3 In aqueous solution, the solution is named B solution;

[0034] Step 3, 0.02g cetyltrimethylammonium bromide (CTAB) and 0.83g Na 2 WO 4 2H 2 O was dissolved in 50mL deionized water, and the solution was named C solution;

[0035] Step 4, slowly add solution A and solution B dropwise to solution C under magnetic stirring to obtain a precursor solution, and use a volume fraction of 50% concentrated ammonia (NH 3 ·H 2 O) adjust the pH of the precursor solution to neutral, stir vigorously for 0.5h, and obtain a white precipitate;

[0036] Step 5. Transfer the mixed solution containing precipitation obtained...

Embodiment 2

[0043] wt1.5%La / Bi 2 WO 6 Preparation of:

[0044] Step 1, take by weighing 0.053g of La(NO 3 ) 3 ·6H 2 O (according to La being wt1.5% proportion), add 10mL absolute ethanol, 2mL glacial acetic acid and 2mL deionized water, fully stir and be made into uniform, transparent A solution;

[0045] Step 2, 2.43g Bi(NO 3 ) 3 ·5H 2 O dissolved in 10mL 4mol / L HNO 3 In aqueous solution, the solution is named B solution;

[0046] Step 3, then 0.02g cetyltrimethylammonium bromide (CTAB) and 0.83g Na 2 WO 4 2H 2 O was dissolved in 50mL deionized water, and the solution was named C solution;

[0047] Step 4, slowly add solution A and solution B dropwise to solution C under magnetic stirring to obtain a precursor solution, and use a volume fraction of 50% concentrated ammonia (NH 3 ·H 2 O) adjust the pH of the precursor solution to neutral, stir vigorously for 1h, and obtain a white precipitate;

[0048] Step 5. Transfer the mixed solution containing precipitate obtained in S...

Embodiment 3

[0051] wt2.0%La / Bi 2 WO 6 Preparation of:

[0052] Step 1, take by weighing 0.07g of La(NO 3 ) 3 ·6H 2 O (according to La is wt2.0% proportion), add 10mL absolute ethanol, 2mL glacial acetic acid and 2mL deionized water, fully stir and be made into uniform, transparent A solution;

[0053] Step 2, 2.43g Bi(NO 3 ) 3 ·5H 2 O dissolved in 10mL 4mol / L HNO 3 In aqueous solution, the solution is named B solution;

[0054] Step 3, then 0.02g cetyltrimethylammonium bromide (CTAB) and 0.83g Na 2 WO 4 2H 2 O was dissolved in 50mL deionized water, and the solution was named C solution;

[0055] Step 4, slowly add solution A and solution B dropwise to solution C under magnetic stirring to obtain a precursor solution, and use a volume fraction of 50% concentrated ammonia (NH 3 ·H 2 O) adjust the pH of the precursor solution to neutral, stir vigorously for 1.5h to obtain a white precipitate;

[0056] Step 5. Transfer the mixed solution containing precipitate obtained in Step ...

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Abstract

The invention discloses a preparation method and application of a La / Bi2WO6 photocatalyst, belongs to the field of catalysts, and solves the problem of poor photocatalytic performance of the La / Bi2WO6photocatalyst prepared by the existing method. The method comprises the following steps: weighing lanthanum nitrate, adding absolute ethyl alcohol, glacial acetic acid and deionized water, and fullystirring to prepare a uniform and transparent solution A; dissolving bismuth nitrate into an aqueous HNO3 solution to obtain a solution B; dissolving hexadecyl trimethyl ammonium bromide and sodium tungstate into deionized water to obtain a solution C; dropwise adding the solution A and the solution B into the solution C under magnetic stirring, adjusting the pH value to 7 by using strong ammoniawater, and violently stirring to obtain a white precipitate; and carrying out a reaction on the precipitate-containing mixed solution at 120-160 DEG C for 6-16 h, drying, and calcining the obtained sample in a muffle furnace to obtain the target product. According to the method, the photocatalytic performance of bismuth tungstate is enhanced, the product purity is high, and ester-105 can be efficiently degraded.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to La / Bi 2 WO 6 Preparation method and application of photocatalyst Background technique [0002] Photocatalytic oxidation has been extensively studied and has shown great potential application value in organic wastewater treatment, but little research has been done in the treatment of flotation reagents. With the development of my country's mining industry, mine mineral processing wastewater has become the main source of mine and surrounding environmental pollution, especially the residual organic flotation reagents in mineral processing wastewater, which are highly toxic, polluting the environment, and energy shortages are restricting human society. important practical issues of development. In recent years, the use of semiconductor photocatalytic oxidation technology to degrade organic pollutants in water and air has attracted much attention. [0003] Bi 2 WO 6 As an Aurivillius-typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/10C02F1/30C02F101/38C02F101/30C02F103/10
CPCB01J23/30B01J37/10C02F1/30C02F2101/38C02F2101/40C02F2103/10C02F2305/10B01J35/39
Inventor 彭涛嘉王军后洁琼臧佳克
Owner NORTHWEST RES INST OF MINING & METALLURGY INST