Composite material having visible-light catalytic activity and preparation method thereof

A technology of catalytic activity and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. , band gap width and other issues, to achieve the effect of solving the difficulty of recycling, enhancing adsorption performance, and enhancing the degree of response.

Active Publication Date: 2013-05-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO 2 The particle size is small, the band gap is wide, and the photogenerated el

Method used

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  • Composite material having visible-light catalytic activity and preparation method thereof
  • Composite material having visible-light catalytic activity and preparation method thereof
  • Composite material having visible-light catalytic activity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1ZnTiO 3 / TiO 2 -Organic pillared montmorillonite CTAB18

[0029] (1) Organic pillared montmorillonite CTAB18 : After smashing the montmorillonite mineral, it is passed through a 200-mesh sieve and placed in a drying oven at 60°C for 2 days, which is the montmorillonite raw soil; take 20 parts by weight of the montmorillonite raw soil and press the montmorillonite raw soil and distilled water The mass ratio is 1:10, the original soil is dispersed in water to form a suspension slurry; afterwards, octadecyltrimethylammonium bromide (octadecyltrimethylammonium bromide) is added in an amount equivalent to 1 times the cation exchange capacity (CEC) of the montmorillonite original soil. CTAB18), stir for 2h under the constant temperature of a water bath at 60℃, and let it stand overnight. The product is washed with deionized water to no Br - (In Ag + Test) Exist, dry at 90℃, fully grind and pass through 200 mesh sieve, then organic pillared montmorillonite can be obtai...

Example Embodiment

[0038] Example 2ZnTiO 3 / TiO 2 -Organic pillared vermiculite CTAB12

[0039] (1) Organic pillared vermiculite CTAB12 : The vermiculite mineral is crushed and passed through a 200-mesh sieve, and placed in a drying oven at 80°C for 1 day to become vermiculite raw soil; take 20 parts by weight of vermiculite raw soil, and the mass ratio of raw soil to distilled water is 1:10 Ratio, disperse the original soil in water to form a suspension slurry; then add dodecyltrimethylammonium bromide (CTAB12) equivalent to twice the amount of the vermiculite original soil cation exchange capacity (CEC) in a 60℃ water bath Stir at a constant temperature for 2 hours, and place overnight. The product is washed with deionized water to no Br - (In Ag + Test) Exist, dry at 90℃, fully grind and pass through 200 mesh sieve, then organic pillared vermiculite can be obtained CTAB12 .

[0040] (2) ZnTiO 3 / TiO 2 The preparation is as step (2) in Example 1.

[0041] (3) ZnTiO 3 / TiO 2 -Organic pillared ver...

Example Embodiment

[0042] Example 3ZnTiO 3 / TiO 2 -Organic pillared rectorite CTAB14

[0043] (1) Organic pillared rectorite CTAB14 : The rectorite mineral is crushed and passed through a 200-mesh sieve, and placed in a 70°C drying oven for 1.5 days to become rectorite raw soil; take 20 parts by weight of rectorite raw soil, according to the mass ratio of raw soil to distilled water Disperse the original soil in water at a ratio of 1:10 to form a suspension slurry; then add tetradecyltrimethylammonium bromide (CTAB14) equivalent to 0.5 times the amount of rectorite original soil cation exchange capacity (CEC), Stir in a water bath at 60°C for 2 hours and place overnight. The product is washed with deionized water to no Br - (In Ag + Test) Exist, dry at 90℃, fully grind and pass through 200 mesh sieve, then organic pillared rectorite can be obtained CTAB14 .

[0044] (2) ZnTiO 3 / TiO 2 The preparation is as step (2) in Example 1.

[0045] (3) ZnTiO 3 / TiO 2 -Organic pillared rectorite CTAB14 :Acco...

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Abstract

The invention discloses a composite material having a visible-light catalytic activity and a preparation method thereof. The composite material having a visible-light catalytic activity is prepared by compounding organic pillared clay and a modified ZnTiO3/TiO2 material. The organic pillared clay is prepared by an intercalation reaction between an organic pillaring agent and raw clay. The ZnTiO3/TiO2 material is prepared by a sol-gel method. The ZnTiO3/TiO2 material and the organic pillared clay are compounded into the ZnTiO3/TiO2-organic pillared clay composite material having a visible-light catalytic activity. Compared with single TiO2, the ZnTiO3/TiO2-organic pillared clay composite material has good responsibility in a visible wavelength range. Through utilization of the organic pillared clay as a carrier, adsorption performances of the ZnTiO3/TiO2-organic pillared clay composite material are improved. The preparation method has the advantages of simple processes, no special equipment, low investment, low cost and popularization convenience.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a composite material with visible light catalytic activity and a preparation method thereof. Background technique [0002] Photocatalysis, as an advanced oxidation technology, has shown broad application prospects in industrial and environmental fields. The key to photocatalytic technology is photocatalyst, TiO 2 (Titanium dioxide) has been one of the main research hotspots because of its high catalytic activity, good stability, low price, and environmental friendliness. However, TiO 2 The particle size is small, the band gap is wide, and the photogenerated electrons are easy to recombine with holes, making it difficult to be widely used in practice. From the perspective of application, the current TiO 2 The research of photocatalyst mainly has two aspects: one is to improve its catalytic efficiency under visible light; the other is to immobilize the cataly...

Claims

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Application Information

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IPC IPC(8): B01J23/06
Inventor 吴平霄吴良兴朱能武党志
Owner SOUTH CHINA UNIV OF TECH
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