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Light absorbing material and preparation method thereof

A light-absorbing material and ultraviolet light technology, applied in chemical instruments and methods, vanadium oxide, metal/metal oxide/metal hydroxide catalysts, etc. Complicated methods and other issues, to achieve the effects of wide and cheap raw material sources, degradation of air pollutants, and enhanced catalytic efficiency

Inactive Publication Date: 2020-11-06
深圳镭铌铒科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that there are few researches on full-spectrum photocatalytic materials, and the preparation methods are relatively complicated and the cost is high, which cannot be applied in large-scale industrial applications.

Method used

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  • Light absorbing material and preparation method thereof
  • Light absorbing material and preparation method thereof
  • Light absorbing material and preparation method thereof

Examples

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preparation example Construction

[0044] The preparation method of the light absorbing material of the present invention comprises the following steps:

[0045]1) Mixing materials: mix the oxalic acid solution and the vanadium-containing precursor, and fully stir to obtain a sol; wherein, the molar ratio of the vanadium in the vanadium-containing precursor to the carbon in the oxalic acid is 1: (1.5~3.5); The vanadium precursor includes any one of vanadium pentoxide and ammonium metavanadate;

[0046] 2) Hydrothermal reaction: react the sol obtained in step 1) at 220-250°C for 24-72 hours to obtain a crude product;

[0047] 3) Post-reaction treatment: washing and drying the crude product to obtain a light-absorbing material.

[0048] The inventive method, according to preset V:C mol ratio, in oxalic acid (H 2 C 2 o 4 ) into the deionized aqueous solution containing vanadium, and the sol was obtained after stirring evenly, and the sol was transferred to a hydrothermal kettle for hydrothermal reaction to obt...

Embodiment 1

[0060] (1) Preparation of sol: get 30mmol of H 2 C 2 o 4 Add it to 80mL of deionized water, stir evenly until completely dissolved; then take 10mmol of V 2 o 5 Dissolve in the above solution and stir evenly until completely dissolved to obtain a sol.

[0061] (2) Hydrothermal reaction: Clean the liner of the hydrothermal reaction kettle with deionized water and absolute ethanol, pour the sol prepared in step 1) into a 100mL liner of the hydrothermal reaction kettle, and react at 240°C for 48 hours, after cooling to room temperature, the product was alternately washed 3 times with water and absolute ethanol, and dried in an oven at 100°C for 10 hours to obtain the black product VO x Powder light absorbing material.

[0062] VO prepared in this embodiment x The powder scanning electron microscope picture is as follows figure 1 As shown, the morphology of the sample is similar to that of a spherical structure. The XRD pattern of the sample is as follows figure 2 As show...

Embodiment 2

[0064] (1) Preparation of sol: get 30mmol of H 2 C 2 o 4 Add to 80mL of deionized water, stir evenly until completely dissolved; then take 20mmol of NH 4 VO 3 Dissolve in the above solution and stir evenly until completely dissolved to obtain a sol.

[0065] (2) Hydrothermal reaction: Clean the liner of the hydrothermal reaction kettle with deionized water and absolute ethanol, pour the sol prepared in step 1) into a 100mL liner of the hydrothermal reaction kettle, and react at 240°C for 48 hours, after cooling to room temperature, the product was alternately washed 3 times with water and absolute ethanol, and dried in an oven at 150°C for 6 hours to obtain the black product VO x Powder light absorbing material.

[0066] The VO x The XRD pattern of the powder is shown in Figure 7 , similar to figure 2 , shown as the novel VO of the present invention x Crystal structure. Its reflection spectrum see Figure 8 , which proves that it has very strong absorption in ultr...

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Abstract

The invention relates to a light absorption material and a preparation method thereof, and belongs to the technical field of functional materials. The technical problem to be solved by the invention is to provide a novel light absorption material capable of efficiently capturing ultraviolet, visible and infrared spectra, the material is VOx powder, wherein x is more than 2 and less than or equal to 2.5. A hydrothermal synthesis method is provided for the first time to prepare the light absorption material, the prepared powder has strong absorption to ultraviolet, visible and near-mid infraredlight, the preparation conditions and process are simple and easy to control, no pollution is caused to the environment, the raw materials are wide in source and cheap, and large-scale production is facilitated. The prepared VOx photocatalyst can fully absorb sunlight, the utilization rate of solar energy is increased, and the catalytic efficiency is enhanced, so that air pollutants can be effectively degraded, and the VOx photocatalyst is suitable for the fields of catalysts and hydrogen production by photolysis of water. In addition, the prepared VOx powder is high in near-infrared and mid-infrared absorption intensity, and can be applied to the fields of infrared light absorption, infrared radiation prevention and the like.

Description

technical field [0001] The present invention relates to a light-absorbing material and a preparation method thereof, in particular to a novel ultraviolet-visible-near-middle-infrared light-absorbing material VO x The invention and a preparation method thereof belong to the technical field of functional materials. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and the environment. It uses semiconductors as catalysts to absorb external sunlight and undergo a series of redox reactions to achieve the effect of degrading pollutants. As a common pollutant degradation method, photocatalytic technology has attracted increasing attention due to its ability to effectively degrade organic pollutants such as rhodamine B, methyl orange, and phenol. In addition, photocatalytic technology can also use solar energy to photocatalytically crack water to generate hydrogen energy, which is expected to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B01J23/22
CPCC01G31/02B01J23/22B01J35/39Y02A50/20
Inventor 黄春明
Owner 深圳镭铌铒科技有限公司
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