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Eu/BiVO4 photocatalyst as well as preparation method and application thereof

A technology of photocatalyst and reactor, which is applied in the field of photocatalytic materials, can solve problems such as multiple processes and complex processes, and achieve high photocatalytic performance, simple process flow, and high production efficiency

Active Publication Date: 2013-12-11
盐城市鹤业实业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping improves BiVO 4 The photocatalytic reaction efficiency and selectivity of BiVO 4 The method of doping modification is mostly the impregnation method, that is, the pure phase BiVO is prepared by the traditional solid-state reaction method, chemical co-precipitation method, sol-gel method and hydrothermal method. 4 Finally, select the appropriate metal source and dope it by impregnation method, which has many processes and complicated process

Method used

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  • Eu/BiVO4 photocatalyst as well as preparation method and application thereof
  • Eu/BiVO4 photocatalyst as well as preparation method and application thereof
  • Eu/BiVO4 photocatalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A Eu / BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Eu 3+ , wherein the molar ratio of Eu element to Bi element is 4.17:100.

[0033] A Eu / BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0034] Step 1: Bi(NO 3 ) 3 ·5H 2 O was dissolved in deionized water and stirred on a magnetic stirrer for 20 min to obtain Bi(NO3 ) 3 ·5H 2 Bismuth salt solution with O concentration of 0.4mol / L; NH 4 VO 3 Dissolve in deionized water at 95°C, heat and stir on a magnetic stirrer at 90°C for 20min to obtain NH 4 VO 3 Concentration is the vanadium salt solution of 0.4mol / L;

[0035] Step 2: slowly drop the vanadium salt solution into the bismuth salt solution according to the molar ratio of Bi and V of 1:1, and stir on a magnetic stirrer for 15 minutes to obtain a mixed solution;

[0036] Step 3: Add dropwise NaOH solution with a concentration of 5 mol / L to the mixed...

Embodiment 2

[0041] A Eu / BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Eu 3+ , wherein the molar ratio of Eu element to Bi element is 6.38:100.

[0042] A Eu / BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0043] Step 1: Bi(NO 3 ) 3 ·5H 2 O was dissolved in deionized water and stirred on a magnetic stirrer for 20 min to obtain Bi(NO 3 ) 3 ·5H 2 Bismuth salt solution with O concentration of 0.4mol / L; NH 4 VO 3 Dissolve in deionized water at 95°C, heat and stir on a magnetic stirrer at 100°C for 20min to obtain NH 4 VO 3 Concentration is the vanadium salt solution of 0.4mol / L;

[0044] Step 2: slowly drop the vanadium salt solution into the bismuth salt solution according to the molar ratio of Bi and V of 1:1, and stir on a magnetic stirrer for 15 minutes to obtain a mixed solution;

[0045] Step 3: Add dropwise NaOH solution with a concentration of 5 mol / L to the mi...

Embodiment 3

[0050] A Eu / BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Eu 3+ , wherein the molar ratio of Eu element to Bi element is 8.70:100.

[0051] A Eu / BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0052] Step 1: Bi(NO 3 ) 3 ·5H 2 O was dissolved in deionized water and stirred on a magnetic stirrer for 20 min to obtain Bi(NO 3 ) 3 ·5H 2 Bismuth salt solution with O concentration of 0.4mol / L; NH 4 VO 3 Dissolve in deionized water at 95°C, heat and stir on a magnetic stirrer at 95°C for 20min to obtain NH 4 VO 3 Concentration is the vanadium salt solution of 0.4mol / L;

[0053] Step 2: slowly drop the vanadium salt solution into the bismuth salt solution according to the molar ratio of Bi and V of 1:1, and stir on a magnetic stirrer for 15 minutes to obtain a mixed solution;

[0054] Step 3: Add dropwise NaOH solution with a concentration of 5 mol / L to the mix...

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Abstract

The invention discloses a Eu / BiVO4 photocatalyst as well as a preparation method and application thereof. The Eu / BiVO4 photocatalyst takes BiVO4 as a main component and is of a tetragonal zircon phase structure; a crystal lattice of the BiVO4 contains Eu<3+>. The preparation method comprises the following steps: respectively dissolving bismuth nitrate pentahydrate and ammonium metavanadate into water to obtain bismuth salt solution and vanadium salt solution; adding the bismuth salt solution into the vanadium salt solution under the condition that the mol ratio of Bi to V is 1:1 to obtain a mixed solution; adjusting the pH value of the mixed solution to be 8; adding europium nitrate hexahydrate, wherein the mol ratio of Eu to Bi is (4.17-13.64):100; preserving heat at the power of 300W and the temperature of 180 DEG C for 40 minutes by using a microwave hydrothermal method to obtain the Eu / BiVO4 photocatalyst. The Eu / BiVO4 photocatalyst disclosed by the invention is quickly synthesized, has higher photocatalytic performance under the irradiation of visible light and can be used for degrading organic matters. The preparation method has the advantages of fewer preparation process flows, simplicity in operation, short preparation period and regular crystal.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a Eu / BiVO 4 Photocatalyst and its preparation method and application. Background technique [0002] At present, the global environmental pollution problem restricts the progress of human civilization, and the elimination of environmental pollutants consumes a lot of energy, which poses a severe challenge to the increasingly depleted energy. Therefore, it is necessary to seek a new, efficient The method of treating pollutants is the common goal pursued by many researchers, and then photocatalytic technology came into being. [0003] Photocatalytic technology will alleviate the crisis caused by the depletion of petroleum energy and the greenhouse effect by converting solar energy into clean hydrogen energy; photocatalytic technology has wide applicability to the removal of pollutants in water and gas phases, and This technology has outstanding features such as low energy c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22A62D3/17
Inventor 谈国强罗洋洋董国华任慧君
Owner 盐城市鹤业实业投资有限公司
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