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Preparation method of rare-earth composite oxide photocatalyst

A photocatalyst and rare earth composite technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve good catalytic activity, mild reaction conditions, and simple operation

Inactive Publication Date: 2011-06-01
INNER MONGOLIA UNIVERSITY
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Problems solved by technology

[0004] So far, the research on ionic liquids has achieved remarkable results, but the research work mainly focuses on the catalysis of ionic liquids and the utilization of their good solvent properties, and there are few reports on the preparation of visible light catalysts by using ionic liquids.

Method used

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  • Preparation method of rare-earth composite oxide photocatalyst
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  • Preparation method of rare-earth composite oxide photocatalyst

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Embodiment 1

[0015] Embodiment 1: take by weighing 3.2492gLa (NO 3 ) 3 ·nH 2 O, 2.02gFe(NO 3 ) 3 ·6H 2 O and 1.7895g50% Mn(NO 3 ) 3 The solution was dissolved in 140mL deionized water to make a metal nitrate mixed solution. Weigh 3.2844g of N-methylimidazole, mix it with 20mL of toluene, stir in a water bath at 85°C for 45min, add 5.3mL of diethyl sulfate, stir at room temperature for 2h, let stand for liquid separation, remove the lower layer of ionic liquid, and add an appropriate amount of Ammonia water was added to the metal nitrate mixed solution which was constantly stirred, and a precipitate was formed. Stirring was continued for 1 hour, ultrasonic dispersion was carried out for 0.5 hour, then ionic liquid was added, and then ultrasonic dispersion was carried out for 1 hour. The resulting precipitate was washed with deionized water and ethanol to pH 7, respectively. The precipitate was dried in an oven at 100°C in an air atmosphere for 12 hours, then calcined in a muffle fur...

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Abstract

The invention discloses a preparation method of a rare-earth composite oxide photocatalyst. The main preparation technology comprises the following steps: dissolving La(NO3)3.nH2O, Fe(NO3)3.9H2O and 50% Mn(NO3)2 in deionized water to prepare the mixed solution of metal nitrates; adding ammonia water in the mixed solution to adjust the pH value, stirring, performing ultrasonic dispersion, adding ionic liquid prepared from N-methylimidazole, toluene and diethyl sulfate, performing ultrasonic dispersion continuously; and performing centrifugal separation, washing the obtained precipitate, dryingthe precipitate in an oven, roasting in a muffle furnace to obtain oxide raw powder, and roasting in air atmosphere to finally prepare the new La-Fe-Mn catalyst. The preparation method has simple process and mild reaction conditions; and the prepared catalyst has better catalytic activity in the reaction that the catalytic degradation of phenol is performed under visible light.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a rare earth composite oxide photocatalyst. Background technique [0002] In many industrial production areas such as gas, coking, oil refining, metallurgy, machinery manufacturing, glass, petrochemical, wood fiber, chemical organic synthesis, plastics, medicine, pesticides, paint and other industries will produce a large amount of phenolic wastewater. Phenol-containing wastewater mainly contains phenol-based compounds, such as phenol, cresol, xylenol, and nitrocresol. Phenolic compounds are not only difficult to degrade but also highly toxic, and have potential hazards of carcinogenicity and teratogenicity. High-concentration phenol-containing wastewater is mainly recycled by physical and chemical methods, but there is no mature technology for the treatment of low-concentration phenol-containing wastewater. Photochemical catalytic oxidation is one o...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/83B01J23/745C02F1/30C02F1/72
Inventor 胡瑞生贾海霞刘贵丽刘林倪移曹文慧
Owner INNER MONGOLIA UNIVERSITY
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