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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 electrons are easy to recombine with holes, making it difficult to be widely used in practice.

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 1

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

[0029] (1) Organic pillared montmorillonite CTAB18: The montmorillonite mineral is crushed and passed through a 200-mesh sieve, placed in a drying oven at 60°C and dried for 2 days, which is the original montmorillonite soil; 20 parts by weight of the original montmorillonite soil are mixed according to the ratio of the original montmorillonite soil and distilled water. The mass ratio is 1:10, and the original soil is dispersed in water to form a suspension slurry; then, octadecyltrimethylammonium bromide ( CTAB18), stirred in a water bath at 60°C for 2 hours, and left overnight. The product was washed with deionized water to be free of Br - (in Ag + test) exists, dried at 90°C, fully ground and passed through a 200-mesh sieve to obtain organic pillared montmorillonite CTAB18 .

[0030] (2) ZnTiO 3 / TiO 2 Preparation: molar ratio [Zn +2 ] / [Ti +4 ]=1 ratio, under magnetic stirring, 2.5g zinc a...

example 2

[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, placed in an 80°C drying oven and dried for 1 day to become the original vermiculite soil; take 20 parts by weight of the original vermiculite soil, and the mass ratio of the original soil to distilled water is 1:10 Ratio, disperse the raw soil in water to form a suspension slurry; then add dodecyltrimethylammonium bromide (CTAB12) in an amount equivalent to twice the cation exchange capacity (CEC) of the vermiculite raw soil, in a water bath at 60°C Stir at constant temperature for 2h and leave overnight. The product was washed with deionized water to be free of Br - (in Ag + inspection) exists, dried at 90°C, fully ground and passed through a 200-mesh sieve to obtain organic pillared vermiculite CTAB12 .

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

example 3

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

[0043] (1) Organic pillared rectorite CTAB14 : the rectorite mineral is passed through a 200-mesh sieve after being pulverized, placed in a 70°C drying oven and dried for 1.5 days, which is the original rectorite soil; get 20 parts by weight of the rectorite original soil, and the mass ratio of the original soil to distilled water is The ratio of 1:10, disperse the original soil in water to form a suspension slurry; then add tetradecyltrimethylammonium bromide (CTAB14) in an amount equivalent to 0.5 times the cation exchange capacity (CEC) of rectorite original soil, Stir for 2 h under the constant temperature condition of a water bath at 60° C., and let stand overnight. The product was washed with deionized water to be free of Br - (in Ag + test) exists, dried at 90°C, fully ground and passed through a 200-mesh sieve to obtain organic pillared rectorite CTAB14 .

[0044] (2) ZnTiO 3 / TiO 2 The prepa...

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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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