Preparation method of expanded perlite loaded nanometer TiO2 compound photocatalysis material

A technology of expanded perlite and composite photocatalysis, which is applied in the direction of light water/sewage treatment, etc., and can solve problems such as poor thermal stability

Inactive Publication Date: 2012-10-03
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal ion doping can effectively expand TiO 2 visible light response, but the metal ion doped TiO 2 Poor thermal stability; non-metal doped TiO 2 Not only has a good response in the visible light region and shows strong photocatalytic activity, but this photocatalytic activity is not at the expense of photoactivity under UV excitation, which can overcome the defects of metal ion doping, and can be used in nano TiO 2 Preparation of supported nano-TiO by natural non-metallic minerals with completely different chemical compositions as supports 2 Composite materials, for nano TiO 2 This kind of photocatalyst itself is also a kind of doping method, but it can improve the nano-TiO 2 Utilization of visible light

Method used

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  • Preparation method of expanded perlite loaded nanometer TiO2 compound photocatalysis material
  • Preparation method of expanded perlite loaded nanometer TiO2 compound photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 60kg of expanded perlite, add 2000L of water, add hydrochloric acid to adjust the pH value of the slurry to 2, stir to disperse and cool to 5°C, then add 120L of a prepared titanium tetrachloride aqueous solution with a mass concentration of 50% and a concentration of 200g / L Ammonium sulfate solution 300L; stir the reaction and raise the temperature to 50°C, then add ammonia water to adjust the pH value of the reaction solution to 5.0, and then age at 50°C for 2.0h; Calcined at 550°C for 4 hours in a rotary furnace to obtain expanded perlite-loaded nano-TiO 2 Composite photocatalytic materials.

Embodiment 2

[0029] Take 60kg of expanded perlite, add 2000L of water, adjust the pH value to 2 with hydrochloric acid, stir to disperse and cool to 3°C, then add 150L of titanium tetrachloride solution with a mass concentration of 50% and sulfuric acid with a concentration of 200g / L in sequence Ammonium solution 360L; Stir the reaction and raise the temperature to 60°C, then add ammonia water to adjust the pH value of the reaction solution to 4.5, then age at 60°C for 2.0h; Calcined at 600°C for 4 hours in a converter to obtain expanded perlite-loaded nano-TiO 2 Composite photocatalytic materials.

Embodiment 3

[0031] Take 60kg of expanded perlite, add 1800L of water, adjust the pH value to 2 with hydrochloric acid, stir to disperse and cool to 4°C, then add 124L of titanium tetrachloride solution with a mass concentration of 50% and sulfuric acid with a concentration of 200g / L in sequence Ammonium solution 300L; Stir the reaction and heat up to 50°C, then add ammonia water to adjust the pH value of the reaction solution to 5.0, then age at 50°C for 2.0h; Calcined in a converter at a temperature of 500°C for 4 hours to obtain expanded perlite-loaded nano-TiO 2 Composite photocatalytic materials.

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Abstract

The invention relates to a preparation method of an expanded perlite loaded nanometer TiO2 compound photocatalysis material. The preparation method comprises the steps as follows: adding expanded perlite with water for stirring to prepare pulp, adding acid for adjusting the pH value, cooling the pulp, then adding a TiC14 solution and an ammonium sulfate solution in sequence for carrying out load reaction; after the load reaction is ended, heating the reaction solution to be a certain temperature, then adding a diluted ammonia water solution for adjusting the pH value of the solution and ageing for a certain time; and filtering, washing, drying and calcining the reaction product so as to obtain the expanded perlite loaded nanometer TiO2 compound photocatalysis material. The expanded perlite loaded nanometer TiO2 compound photocatalysis material has excellent photocatalysis performance in both ultraviolet light and visible light. The photocatalytic degradation rate of the expanded perlite loaded nanometer TiO2 compound photocatalysis material on a rhodamine B solution within 30 min in the ultraviolet light is more than 90%. The degradation removal rate of the expanded perlite loaded nanometer TiO2 compound photocatalysis material on formaldehyde within 24 h is more than 75%.

Description

1 technical field [0001] The invention relates to an expanded perlite loaded nano TiO 2 The invention discloses a method for preparing a composite photocatalytic material, belonging to the fields of mineral processing and non-metallic mineral materials. 2 Technical Background [0002] Since the 1970s, nano-TiO 2 It has been proven to be a photocatalytic material with high efficiency, non-toxicity and stable performance. But there are two problems in actual use. [0003] One is pure nano TiO 2 Easy to reunite, difficult to produce, and difficult to recycle after use. Loading it on a suitable carrier material is one of the main methods to solve its easy to agglomerate and difficult to recycle. Currently researched nano-TiO 2 The carrier materials mainly include diatomite, activated carbon, molecular sieve, zeolite, bentonite, sepiolite, glass, ceramics, white carbon black, protein soil, attapulgite, etc.; the second is pure nano-TiO 2 The utilization rate of natural lig...

Claims

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Application Information

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IPC IPC(8): B01J23/78C02F1/32A62D3/17A62D101/28
Inventor郑水林卢芳慧宋兵
OwnerCHINA UNIV OF MINING & TECH (BEIJING)