Preparation method of porous nanocrystalline titanium dioxide catalyst by utilizing biological template

A biological template, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of complex synthesis process, low photocatalytic activity, small specific surface area, etc., to achieve simple synthesis process, high light Catalytic activity, high yield effect

Inactive Publication Date: 2012-06-27
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the technical problems of low crystallinity, small specific surface area, low photocatalytic activity, complex synthesis process and high cost of existing nanocrystalline titanium dioxide photocatalysts; and provides a method for preparing porous nanocrystals using biological templates Titanium dioxide catalyst method

Method used

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  • Preparation method of porous nanocrystalline titanium dioxide catalyst by utilizing biological template
  • Preparation method of porous nanocrystalline titanium dioxide catalyst by utilizing biological template
  • Preparation method of porous nanocrystalline titanium dioxide catalyst by utilizing biological template

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specific Embodiment approach 1

[0014] Specific embodiment one: utilize biological template to prepare the method for porous nanocrystalline titania catalyst in this embodiment according to the following steps:

[0015] Step 1, washing the biological template with distilled water and then drying it at 100-140°C;

[0016] Step 2, dissolving the titanium source in the alcohol according to the volume ratio of the titanium source and the alcohol at a ratio of 1: (1 to 10), stirring and mixing evenly to obtain a sol;

[0017] 3. Immerse the biological template treated in step 1 in the sol, the immersion time is 5-72 hours, and then ultrasonically treat it at an ultrasonic frequency of 20-40KHz and an ultrasonic power of 300-600W for 10min-3h (so that the sol can fully enter the channel. ), and then dried at 40-80°C, and then pre-crystallized and roasted at 200-300°C for 3-12 hours to obtain the mixed material;

[0018] 4. Disperse the mixed material in distilled water according to the ratio of mixed material and...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that the biological template described in Step 1 is cattail leaves or corn stalks. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that the alcohol described in step 2 is one of methanol, ethanol, isopropanol or butanol or a mixture of several of them. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of a porous nanocrystalline titanium dioxide catalyst by utilizing a biological template, which relates to the preparation method of the porous nanocrystalline titanium dioxide catalyst, and aims to solve the problems that the existing porous nanocrystalline titanium dioxide catalyst has lower crystallinity, smaller specific surface area, lower photocatalytic activity, complicated synthesis process, higher cost and the like. The preparation method comprises the following steps: (1) cleaning and drying the biological template; (2) dissolving a titanium source into alcohol, and uniformly mixing to obtain sol; (3) immersing the biological template into the sol, ultrasonic processing, drying and pre-crystallization roasting; (4)dispersing into distilled water, adding organic amine to adjust a pH value, refluxing, washing to be neutral by the distilled water, and drying; and (5) roasting, and cooling to be at a room temperature to obtain the porous nanocrystalline titanium dioxide catalyst. The prepared porous nanocrystalline titanium dioxide catalyst has high crystallinity, large specific surface area, high thermal stability, and the like; and the synthesis process is simple, the cost is low, the yield is high, the needed equipment is simple and easy, and the industrial production is easy to realize.

Description

technical field [0001] The invention relates to a preparation method of a porous nanocrystalline titanium dioxide catalyst. Background technique [0002] With the rapid development of the world economy, the excessive use of fossil energy for human survival has led to a series of serious environmental pollution problems such as greenhouse effect, air pollution, soil pollution, water pollution, etc., thus greatly destroying the ecology of the earth. environment. In addition to causing direct damage and impact on the ecological system, the accumulation, migration and transformation of pollutants will also cause various derivative environmental effects, causing indirect and more serious harm to the ecological system and human society. For example, acid rain and ozone depletion are environmental effects derived from air pollution. According to the report of the World Health Organization and the United Nations Environment Program: 1.8 billion people in the world have drank pollu...

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Application Information

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IPC IPC(8): B01J21/06B01J35/10C02F1/32B01D53/86
Inventor付宏刚周卫田国辉潘凯邢子鹏邹金龙孙凡飞
OwnerHEILONGJIANG UNIV