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

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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 preparat

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

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Example Embodiment

[0028] Example 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 Put O powder in beaker A, add 20 mL of 4M nitric acid, and stir well to obtain a clear solution; separately weigh 0.58 g of NH 4 VO 3 In beaker B, add 20 mL of 4M NaOH, stir well to obtain a clear solution; then under rapid stirring, add the solution in beaker A to the solution in beaker B drop by drop to obtain an orange-yellow precipitate, add 1M NaOH solution, adjust the pH to 7, after fully stirring for 30 minutes, transfer the orange-yellow solution to a 100 mL hydrothermal reactor, and hydrothermally react at 180°C for 24 hours. After being cooled to room temperature, the product was washed with deionized water several times, and then placed in an oven at 60°C for 24 hours. After cooling, it was treated with a mortar and placed in a muffle furnace at 500°C for 2 hours. After cooling to room temperature, grind the obtained powder with an agate mo...

Example Embodiment

[0030] Example 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 Put O powder in beaker A, add 20 mL of 4M nitric acid, and stir thoroughly to obtain a clear solution; separately weigh with 1.16 g of NH 4 VO 3 In beaker B, add 20 mL of 4M NaOH, stir well to obtain a clear solution; then under rapid stirring, add the solution in beaker A to the solution in beaker B drop by drop to obtain an orange-yellow precipitate, add 1M NaOH solution, adjust the pH to 7, after fully stirring for 30 minutes, transfer the orange-yellow solution to a 100 mL hydrothermal reactor, and hydrothermally react at 180°C for 24 hours. After being cooled to room temperature, the product was washed with deionized water several times, and then placed in an oven at 60°C for 24 hours. After cooling, it was treated with a mortar and placed in a muffle furnace at 500°C for 2 hours. After cooling to room temperature, grind the obtained powder with ...

Example Embodiment

[0032] Example 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 Put O powder in beaker A, add 20 mL of 4M nitric acid, and stir thoroughly to obtain a clear solution; separately weigh with 1.16 g of NH 4 VO 3 In beaker B, add 20 mL of 4M NaOH, stir well to obtain a clear solution; then under rapid stirring, add the solution in beaker A to the solution in beaker B drop by drop to obtain an orange-yellow precipitate, add A 1M NaOH solution was adjusted to a pH of 7, and after fully stirring for 30 minutes, the orange-yellow precipitate was transferred to a 100 mL hydrothermal reaction vessel, and hydrothermally reacted at 180°C for 24 hours. After being cooled to room temperature, the product was washed with deionized water several times, and then placed in an oven at 60°C for 24 hours. After cooling, it was treated with a mortar and placed in a muffle furnace at 500°C for 2 hours. After cooling to room temperature,...

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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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