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a heterogeneous fevo 4 Catalytic material, preparation method and application thereof

A catalytic material and heterogeneous technology, applied in the field of water treatment, can solve the problems of low catalytic efficiency, limited electron conduction rate, low specific surface area, etc., to improve stability and catalytic activity, high electron transfer rate, large specific surface area The effect of surface area

Active Publication Date: 2021-03-12
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to the traditional FeVO 4 In the process of activating the oxidant, there are problems such as low specific surface area and limited electron conduction rate, which lead to low catalytic efficiency and limited application in AOPs process

Method used

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  • a heterogeneous fevo <sub>4</sub> Catalytic material, preparation method and application thereof
  • a heterogeneous fevo <sub>4</sub> Catalytic material, preparation method and application thereof
  • a heterogeneous fevo <sub>4</sub> Catalytic material, preparation method and application thereof

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preparation example Construction

[0032] The invention provides a heterogeneous FeVO 4 The preparation method of catalytic material comprises the following steps:

[0033] (1) Under the conditions of heating and stirring, the iron salt aqueous solution is added dropwise to the vanadate aqueous solution, mixed for co-precipitation reaction, and FeVO 4 Precursor;

[0034] (2) the FeVO 4 The precursor is calcined to obtain FeVO 4 roasting material;

[0035] (3) the FeVO 4 Calcined material, buffer solution and modifier are mixed to obtain modified FeVO 4 ; The modifying agent is an organic compound containing amino and / or hydroxyl;

[0036] (4) under protective atmosphere, the modified FeVO 4 Calcined to obtain the heterogeneous FeVO 4 catalytic material.

[0037] In the present invention, unless otherwise specified, the raw materials used are commercially available items well known to those skilled in the art.

[0038] In the present invention, under the conditions of heating and stirring, the iron sal...

Embodiment 1

[0049] A heterogeneous FeVO 4 Catalyst material, preparation steps are as follows:

[0050] (1) FeVO 4 Precursor preparation

[0051] Fe(NO 3 ) 3 9H 2 O aqueous solution and NH 4 VO 3 Aqueous solution, Fe(NO 3 ) 3 9H 2 O aqueous solution was added dropwise to NH 4 VO 3 In aqueous solution (Fe(NO 3 ) 3 9H 2 O and NH 4 VO 3 The molar ratio is 1:1), after the dropwise addition, continue to stir for 60 minutes, then cool naturally to room temperature, adjust the pH value to 8.0 with ammonia water with a concentration of 20wt%, and then centrifugally wash twice with deionized water and ethanol. The final solid phase was dried in an oven at 60°C for 12 hours to obtain FeVO 4 Precursor.

[0052] (2) Precursor roasting

[0053] FeVO 4 The precursor was placed in a muffle furnace and calcined at 550 °C for 4 h at a heating rate of 10 °C / min in an air atmosphere to obtain FeVO 4 Roasting material.

[0054] (3) Modification

[0055] FeVO 4 Roasting material is pla...

Embodiment 2

[0077] A heterogeneous FeVO 4 Catalyst material, preparation steps are as follows:

[0078] (1) FeVO 4 Precursor preparation

[0079] Fe(NO 3 ) 3 9H 2 O aqueous solution, NH with a concentration of 0.2mmol / L 4 VO 3 Aqueous solution, Fe(NO 3 ) 3 9H 2 O aqueous solution was added dropwise to NH 4 VO 3 In aqueous solution (Fe(NO 3 ) 3 9H 2 O and NH 4 VO 3 The molar ratio is 1:1), after the dropwise addition, continue to stir for 60 minutes, then cool naturally to room temperature, adjust the pH value to 8.0 with ammonia water with a concentration of 20wt%, and then centrifugally wash twice with deionized water and ethanol, and then centrifugally clean The final solid phase was dried in an oven at 60°C for 12 hours to obtain FeVO 4 Precursor.

[0080] (2) Roasting

[0081] FeVO 4 The precursor was placed in a muffle furnace and calcined at 550 °C for 4 h at a heating rate of 10 °C / min in an air atmosphere to obtain FeVO 4 Roasting material.

[0082] (3) Modific...

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Abstract

The invention provides a heterogeneous FeVO 4 Catalytic materials and preparation methods and applications thereof relate to the technical field of water treatment. The preparation method provided by the invention includes: under the conditions of heating and stirring, dropping the iron aqueous salt solution into the vanadate aqueous solution, and mixing to perform a co-precipitation reaction to obtain FeVO 4 Precursor; the precursor is calcined to obtain FeVO 4 Roasting material; mix the roasting material, buffer solution and modifier to obtain modified FeVO 4 ; Under protective atmosphere, modify FeVO 4 Perform roasting to obtain heterogeneous FeVO 4 Catalytic materials. Heterogeneous FeVO prepared by the present invention 4 The catalytic material has a large specific surface area and high electron transfer rate, and can effectively activate various oxidants in the AOPs process; and the catalytic material can generate a large amount of free radicals and non-selectively degrade various emerging pollutants; in addition, the catalytic material The metal ion leaching can meet the environmental protection requirements of water treatment effluent.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a heterogeneous FeVO 4 Catalytic materials and their preparation methods and applications. Background technique [0002] Emerging pollutants (ECs) refer to chemical pollutants that are "newly identified or not confirmed before", "not regulated by regulations", and "potentially or substantially threatening to human health and the ecological environment". At present, ECs that people pay more attention to include medical drugs (such as antibiotics, anti-inflammatory drugs and painkillers, etc.), personal care products (such as perfumes, cosmetics and shampoos, etc.), environmental hormones (including pesticides, herbicides, plastics, etc.) stabilizers and plasticizers, estrogen, etc.) and other three aspects. In recent years, with the improvement of the level of environmental analysis, various emerging pollutants have been frequently detected in environmental media such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J23/847B01J35/02B01J35/10C02F1/72C02F101/34C02F101/38B01J35/00
CPCB01J27/24B01J23/8472C02F1/725C02F2101/38C02F2101/40C02F2101/34B01J35/40B01J35/613
Inventor 魏健赖蕾朵敖蒙蒙赖波段亮
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI