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Plant Fiber Loading Modified Nano Titanium Dioxide Composite Material and Its Preparation and Application

A technology of nano-titanium dioxide and plant fiber, which is applied in the direction of catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc. It can solve difficult separation and recovery, inability to make full use of solar energy, and easy agglomeration Inactivation and other issues, to achieve great development prospects, improve the effect of a narrow range of light response and a wide range of sources

Active Publication Date: 2019-11-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Titanium dioxide is an indirect bandgap semiconductor, which can only absorb ultraviolet rays with a wavelength less than 387nm, so it cannot make full use of solar energy, that is, the photoresponse range is narrow; the photogenerated electrons and holes of pure titanium dioxide are easily recombined, resulting in low photon quantum efficiency; most titanium dioxide Mainly powder, there are problems of easy agglomeration and deactivation and difficult separation and recovery in practical applications, that is, there is a problem of immobilization of pure titanium dioxide

Method used

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  • Plant Fiber Loading Modified Nano Titanium Dioxide Composite Material and Its Preparation and Application
  • Plant Fiber Loading Modified Nano Titanium Dioxide Composite Material and Its Preparation and Application
  • Plant Fiber Loading Modified Nano Titanium Dioxide Composite Material and Its Preparation and Application

Examples

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Effect test

Embodiment 1

[0032] Example 1 Preparation method of plant fiber loaded modified nano titanium dioxide composite material

[0033] (1) Select one or a mixture of bamboo, reed, rice straw, wheat straw, etc., and remove non-fibrous components such as lignin after polishing treatment, and immerse the obtained cellulose component in distilled water and put it in an oven. Slowly heat to 120°C and take it out after one hour. After it cools to room temperature, wash it with deionized water, then put it in an oven, slowly heat it to 100°C, take it out one hour later, crush and sieve to obtain plant fiber.

[0034] (2) Purifying the plant fiber obtained in step (1) to further remove pectin, gum and other impurities in the plant fiber. Firstly, the plant fiber is immersed in boiling water for 1 min, and then 5g / L H 2 O 2 And 4g / L Na 2 SiO 3 Perform oxygen bleaching, then rinse with water, rinse with boiling water for 2 minutes, then rinse with deionized water 3 times, then put it in an oven, slowly heat t...

Embodiment 2

[0041] Example 2 Preparation method of plant fiber loaded modified nano titanium dioxide composite material

[0042] (1) Select one or a mixture of bamboo, reed, rice straw, wheat straw, etc., and remove non-fibrous components such as lignin after polishing treatment, and immerse the obtained cellulose component in distilled water and put it in an oven. Slowly heat to 120°C and take it out after one hour. After it cools to room temperature, wash it with deionized water, then put it in an oven, slowly heat it to 100°C, take it out one hour later, crush and sieve to obtain plant fiber.

[0043] (2) Purifying the plant fiber obtained in step (1) to further remove pectin, gum and other impurities in the plant fiber. Firstly, the plant fiber is immersed in boiling water for 1 min, and then 5g / L H 2 O 2 And 4g / L Na 2 SiO 3 Perform oxygen bleaching, then rinse with water, rinse with boiling water for 2 minutes, then rinse with deionized water 3 times, then put it in an oven, slowly heat t...

Embodiment 3

[0050] Example 3 Preparation method of plant fiber loaded modified nano titanium dioxide composite material

[0051] (1) Select one or a mixture of bamboo, reed, rice straw, wheat straw, etc., and remove non-fibrous components such as lignin after polishing treatment, and immerse the obtained cellulose component in distilled water and put it in an oven. Slowly heat to 120°C and take it out after one hour. After it cools to room temperature, wash it with deionized water, then put it in an oven, slowly heat it to 100°C, take it out one hour later, crush and sieve to obtain plant fiber.

[0052] (2) Purifying the plant fiber obtained in step (1) to further remove pectin, gum and other impurities in the plant fiber. Firstly, the plant fiber is immersed in boiling water for 1 min, and then 5g / L H 2 O 2 And 4g / L Na 2 SiO 3 Perform oxygen bleaching, then rinse with water, rinse with boiling water for 2 minutes, then rinse with deionized water 3 times, then put it in an oven, slowly heat t...

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Abstract

The invention provides a plant fiber loaded modified nano- titanium dioxide composite material and a preparation method thereof. The loaded modified titanium dioxide composite material prepared by themethod can fully improve narrow photoresponse range, low quantum efficiency and existing solid loading of the titanium dioxide, the finally prepared interlaid composite material with a micro / nano structure can be used for purifying organic gases such as formaldehyde. In addition, the plant fiber loaded modified nano-titanium dioxide composite material uses plant fibers as a main raw material, hasa wide range of sources, and has no pollution in a production process; the invention also provides a simple and feasible method for producing the loaded modified titanium dioxide composite material,and has a great development prospect.

Description

Technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, and specifically relates to a plant fiber loaded modified nanometer titanium dioxide composite material and a preparation method thereof, and its application as a photocatalyst with strong adsorption capacity. Background technique [0002] The presence of volatile organic compounds (VOCs) in the indoor environment seriously affects human health. Among them, the gas pollution with formaldehyde lasts for a long time and is harmful. It has been designated by the World Health Organization (WHO) and the United States Environmental Protection Agency (EPA). It is a potentially dangerous carcinogen for the human body and an important environmental pollutant. [0003] Photocatalytic reaction is a chemical reaction carried out under the action of light. Photochemical reactions require molecules to absorb electromagnetic radiation of specific wavelengths and are excited to produce molecular e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J37/03B01J37/02B01J37/08B01J37/34B01D53/02B01J20/24B01J20/28B01J20/30
CPCB01D53/02B01D2257/704B01D2257/708B01J20/06B01J20/24B01J20/28007B01J31/38B01J35/0013B01J35/004B01J35/006B01J37/0201B01J37/024B01J37/038B01J37/08B01J37/346
Inventor 黄新文朱舒懿伊欣欣沈林叶徐璐
Owner ZHEJIANG UNIV OF TECH
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