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Gd-doped BiVO4 photocatalyst as well as preparation method and application thereof

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

Active Publication Date: 2013-12-11
SHAANXI UNIV OF SCI & TECH
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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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  • Gd-doped BiVO4 photocatalyst as well as preparation method and application thereof
  • Gd-doped BiVO4 photocatalyst as well as preparation method and application thereof
  • Gd-doped BiVO4 photocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0034] A Gd-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Gd 3+ , wherein the molar ratio of Gd element to Bi element is 2.04:100.

[0035] A Gd-doped BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0036] 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 100°C for 20min to obtain NH 4 VO 3 Concentration is the vanadium salt solution of 0.4mol / L;

[0037] 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;

[0038] Step 3: Add dropwise NaOH solution with a concentration of 5 mol / L to the mixture at a...

Embodiment 2

[0043] A Gd-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Gd 3+ , wherein the molar ratio of Gd element to Bi element is 4.17:100.

[0044] A Gd-doped BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0045] 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;

[0046] 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;

[0047] Step 3: Add dropwise NaOH solution with a concentration of 5 mol / L to the mixture at a...

Embodiment 3

[0052] A Gd-doped BiVO 4 Photocatalyst whose main component is BiVO 4 , is a tetragonal zircon phase structure, and BiVO 4 The lattice contains Gd 3+ , wherein the molar ratio of Gd element to Bi element is 6.38:100.

[0053] A Gd-doped BiVO 4 The preparation method of photocatalyst comprises the following steps:

[0054] 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;

[0055] 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;

[0056] 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 a Gd-doped BiVO4 photocatalyst as well as a preparation method and application thereof. The Gd-doped BiVO4 photocatalyst takes BiVO4 as a main component and is of a quartet zircon phase structure; a crystal lattice of the BiVO4 contains Gd<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 mixes solution; adjusting the pH value of the mixed solution to be 8; adding gadolinium nitrate hexahydrate, wherein the mol ratio of Gd to Bi is (2.04-11.11):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 Gd-doped BiVO4 photocatalyst. The preparation method disclosed by the invention has the advantages of simple flow, simplicity in operation, short reaction time and mild reaction condition; the synthesized Gd-doped BiVO4 photocatalyst has higher photocatalytic activity and a favorable application prospect and can be used for degrading organic matters.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Gd-doped BiVO 4 Photocatalyst and its preparation method and application. Background technique [0002] In recent years, environmental pollution and energy crisis have brought more and more serious challenges to human survival. As an advanced oxidation process technology, photocatalytic technology has emerged and achieved remarkable development. Using semiconductor materials as photocatalysts to degrade organic pollutants can completely mineralize organic matter into H 2 O and inorganic ions, the degradation rate is fast, and no secondary pollution occurs, which has incomparable advantages over traditional high-temperature and conventional pollution treatment methods. [0003] BiVO 4 Due to its special crystal structure, the material has good photocatalytic activity, acousto-optic conversion and other characteristics, and can be widely used in catalytic oxidation, hydroge...

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 SHAANXI UNIV OF SCI & TECH
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