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Indium oxide-bismuth vanadate compound photocatalyst as well as preparation method and application of photocatalyst

A technology of bismuth vanadate and indium oxide, which is applied in the field of inorganic nano-photocatalyst materials, can solve the problems of limiting the photocatalytic performance of bismuth vanadate, the difficulty of separating photogenerated carriers, and the easy recombination of electrons and holes, and achieve the best visible light response ability , large specific surface area, and the effect of improving catalytic activity

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is that the traditional bismuth vanadate monomer catalyst has defects such as too small specific surface area, poor adsorption capacity, and difficult separation of photogenerated carriers, and easy recombination of electron-hole pairs. Based on the photocatalytic performance of bismuth, an indium oxide nanoparticle-modified bismuth vanadate composite photocatalyst capable of promoting efficient charge separation and high photocatalytic activity and its preparation method have been constructed. In the composite photocatalyst, indium oxide nanoparticles are discretely compounded on The surface of bismuth vanadate is conducive to exposing the highly active indium oxide-bismuth vanadate phase interface, and has broad application prospects in the fields of environmental pollution control, energy, etc.; at the same time, the preparation method of the composite photocatalyst is simple, low in cost, and repeatable. Good performance, can well meet the requirements of mass production

Method used

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  • Indium oxide-bismuth vanadate compound photocatalyst as well as preparation method and application of photocatalyst
  • Indium oxide-bismuth vanadate compound photocatalyst as well as preparation method and application of photocatalyst
  • Indium oxide-bismuth vanadate compound photocatalyst as well as preparation method and application of photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Under normal temperature and pressure, weigh 2.42g of Bi(NO 3 ) 3 ·5H 2 O and 1.95g of In(NO 3 ) 3 ·5H 2 O powder in beaker A, add 20mL of nitric acid with a concentration of 4M, stir well to obtain a clear solution; and weigh 0.58g of NH 4 VO 3 In beaker B, add 20mL of NaOH with a concentration of 4M, stir well to obtain a clear solution; then, under rapid stirring, add the solution in beaker A to the solution in beaker B dropwise to obtain an orange-yellow precipitate, add The concentration is 1M NaOH solution, the pH value is adjusted to 7, and after fully stirring for 30 min, the orange solution is transferred to a 100 mL hydrothermal reaction kettle, and the hydrothermal reaction is carried out at 180° C. for 24 h. After cooling to room temperature, the product was washed several times with deionized water, then placed in an oven at 60°C for 24 hours, treated in a mortar after cooling, placed in a muffle furnace at 500°C, and calcined for 2 hours. After cool...

Embodiment 2

[0031] Under normal temperature and pressure, weigh 4.82g of Bi(NO 3 ) 3 ·5H 2 O and 3.90g of In(NO 3 ) 3 ·5H 2 O powder in beaker A, add 20mL of nitric acid with a concentration of 4M, stir well to obtain a clear solution; and weigh 1.16g of NH 4 VO 3 In beaker B, add 20mL of NaOH with a concentration of 4M, stir well to obtain a clear solution; then, under rapid stirring, add the solution in beaker A to the solution in beaker B dropwise to obtain an orange-yellow precipitate, add The concentration is 1M NaOH solution, the pH value is adjusted to 7, and after fully stirring for 30 min, the orange solution is transferred to a 100 mL hydrothermal reaction kettle, and the hydrothermal reaction is carried out at 180° C. for 24 h. After cooling to room temperature, the product was washed several times with deionized water, then placed in an oven at 60°C for 24 hours, treated in a mortar after cooling, placed in a muffle furnace at 500°C, and calcined for 2 hours. After cool...

Embodiment 3

[0033] Under normal temperature and pressure, weigh 4.82g of Bi(NO 3 ) 3 ·5H 2 O and 3.91g of In(NO 3 ) 3 ·5H 2 O powder in beaker A, add 20mL of nitric acid with a concentration of 4M, stir well to obtain a clear solution; and weigh 1.16g of NH 4 VO 3 In beaker B, add 20mL of NaOH with a concentration of 4M, stir well to obtain a clear solution; then, under rapid stirring, add the solution in beaker A to the solution in beaker B dropwise to obtain an orange-yellow precipitate, add The concentration is 1M NaOH solution, the pH value is adjusted to 7, and after fully stirring for 30 min, the orange-yellow precipitate is transferred to a 100 mL hydrothermal reaction kettle, and the hydrothermal reaction is carried out at 180 ° C for 24 h. After cooling to room temperature, the product was washed several times with deionized water, then placed in an oven at 60°C for 24 hours, treated in a mortar after cooling, placed in a muffle furnace at 500°C, and calcined for 2 hours. ...

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Abstract

The invention discloses a preparation method and application of a novel indium oxide-bismuth vanadate compound photocatalyst. The preparation method comprises the following steps: (1) dissolving bismuth nitrate powder and indium nitrate powder into nitric acid to prepare an acidic mixed solution, and dissolving ammonium metavanadate into a sodium hydroxide solution to prepare a sodium vanadate solution; (2) then mixing the solutions prepared in the step (1), stirring to generate an orange-yellow sediment, then adding an alkaline solution to adjust the pH value to be 7, and fully stirring; (3) conducting hydrothermal reaction on a mixed solution obtained in the step (2), and conducting calcination to prepare the indium oxide-bismuth vanadate compound photocatalyst. The method is low in production cost, simple and feasible, and the photocatalyst has high visible-light activity, and can be utilized for photocatalysis to degrade methyl blue (MB).

Description

technical field [0001] The invention relates to the field of inorganic nano photocatalyst materials, in particular to a composite photocatalyst and a preparation method thereof. Background technique [0002] Photocatalytic reaction is a way in which photocatalyst materials use light energy to transform substances, and it is a chemical reaction carried out by substances under the simultaneous action of catalyst and light. Photocatalysis is an emerging research field intersecting many disciplines such as catalytic chemistry, semiconductor physics, photoelectrochemistry, environmental science and material science. In today's world where environmental pollution problems and energy crises are becoming more and more serious, photocatalytic technology has become a high-profile environmental pollution restoration and purification technology because of its characteristics of directly using sunlight energy as a reaction light source to drive reactions. and clean energy production tec...

Claims

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Application Information

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IPC IPC(8): B01J23/22A62D3/10C02F1/30
Inventor 黄少斌尹佳芝张永清
Owner SOUTH CHINA UNIV OF TECH
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