A kind of sm-doped bivo4 photocatalyst and its preparation method and application

A technology of photocatalysts and reactors, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of complex processes and many processes, and achieve simple processes , high photocatalytic activity, and mild reaction conditions

Active Publication Date: 2015-08-12
盐城青墩津邦水务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Doping improves pure phase 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 to dope it by impregnation method, which has many processes and complicated process

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  • A kind of sm-doped bivo4 photocatalyst and its preparation method and application
  • A kind of sm-doped bivo4 photocatalyst and its preparation method and application
  • A kind of sm-doped bivo4 photocatalyst and its preparation method and application

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Embodiment 1

[0032] A Sm-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Sm 3+ , wherein the molar ratio of Sm element to Bi element is 2.04:100.

[0033] A Sm-doped 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(NO 3 ) 3 ·5H 2Bismuth salt solution with O concentration of 0.4mol / L; NH 4 VO 3 Dissolve in deionized water at 100°C, heat and stir at 100°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 mixture at a...

Embodiment 2

[0041] A Sm-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Sm 3+ , wherein the molar ratio of Sm element to Bi element is 4.17:100.

[0042] A Sm-doped 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 100°C, heat and stir at 90°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 mixture at a...

Embodiment 3

[0050] A Sm-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Sm 3+ , wherein the molar ratio of Sm element to Bi element is 6.38:100.

[0051] A Sm-doped 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 100°C, heat and stir 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 mixed soluti...

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Abstract

The invention discloses an Sm-doped BiVO4 photocatalyst as well as a preparation method and application thereof. The Sm-doped BiVO4 photocatalyst takes BiVO4 as a main component and is of a tetragonal zircon phase structure; a crystal lattice of the BiVO4 contains Sm<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 vanadium salt solution into the bismuth 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 samarium nitrate hexahydrate, wherein the mol ratio of Sm to Bi is (2.04-13.64):100; preserving heat at the power of 300W and the temperature of 180DEG C for 40 minutes by using a microwave hydrothermal method to obtain the Sm-doped BiVO4 photocatalyst. According to the preparation method disclosed by the invention, the Sm-doped BiVO4 photocatalyst is further synthesized; the preparation method has the advantages of fewer flows, simplicity in operation, short reaction time and mild reaction condition; the synthesized Sm-doped BiVO4 photocatalyst has higher photocatalytic activity and can be used for degrading environmental pollutants.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Sm-doped BiVO 4 Photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of modern civilization and science and technology, environmental pollution is becoming more and more serious, and environmental pollution and prevention have become an important topic of global concern. In the past 20 to 30 years, the development of photocatalytic degradation technology has provided human beings with the problem of environmental pollution control. an effective way. Although TiO 2 The representative photocatalytic materials show excellent photocatalytic performance, but they often have the problem of narrow visible light response range and cannot efficiently utilize sunlight. Therefore, in further improving TiO 2 At the same time as improving the photocatalytic performance, it is also necessary and urgent to search for new visi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22C02F1/30
Inventor 谈国强罗洋洋张丽丽董国华任慧君夏傲
Owner 盐城青墩津邦水务有限公司
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