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Preparation method and application of ordered mesoporous titania-nanometer gold composite material

A technology of mesoporous titanium dioxide and composite materials, which is applied in the field of photocatalytic materials, can solve the problems such as the inability to meet the requirements of the oxidation half-reaction, and achieve the effect of improving the photocatalytic reduction performance.

Inactive Publication Date: 2017-07-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional visible light-responsive semiconductor materials, such as nitrogen oxides, sulfides, phosphides, and metal-organic coordination compounds, cannot meet the oxidation half-reaction requirements of the photocatalytic process of carbon dioxide and water.

Method used

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  • Preparation method and application of ordered mesoporous titania-nanometer gold composite material
  • Preparation method and application of ordered mesoporous titania-nanometer gold composite material
  • Preparation method and application of ordered mesoporous titania-nanometer gold composite material

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preparation example Construction

[0026] A kind of preparation method of ordered mesoporous titanium dioxide-nano gold composite material of the present invention, comprises steps as follows:

[0027] White ordered mesoporous titanium dioxide was prepared by solvent evaporation-induced self-assembly and two-step heat treatment;

[0028] Gold nanoparticles are deposited inside the channels of ordered mesoporous titania by chemical reduction to obtain ordered mesoporous titania-nano-gold composites;

[0029] The mass fraction of gold nanoparticles in the ordered mesoporous titanium dioxide-nano gold composite material is 1-9%.

Embodiment 1

[0031] (11) The triblock copolymer F127 (molecular formula is PEO 106 -PPO 70 -PEO 10 ), water-soluble phenolic resin, concentrated hydrochloric acid and tetra-n-butyl titanate are dissolved in ethanol, and stirred evenly to form a wine-red transparent solution, and their mass ratio is triblock copolymer: water-soluble phenolic resin: concentrated hydrochloric acid: titanium Acid tetra-n-butyl ester=1:0.25:0.5:1.7;

[0032] (12) Transfer the solution prepared in step (11) to a flat-bottomed container, perform solvent evaporation at 25°C to induce self-assembly for 12 hours, and then thermally polymerize at 70°C for 12 hours to obtain a wine red film;

[0033] (13) The burgundy film obtained in step (12) is first kept at 350° C. for 3 h in an atmosphere tube furnace with nitrogen, and then kept at 400° C. for 2 h in an atmosphere tube furnace with air. Strictly controlled at 1°C / min, and finally white ordered mesoporous titanium dioxide powder is obtained;

[0034] (14) A c...

Embodiment 2

[0036] (21) The triblock copolymer F127 (molecular formula is PEO 106 -PPO 70 -PEO 10 ), water-soluble phenolic resin, concentrated hydrochloric acid and tetra-n-butyl titanate are dissolved in ethanol, and stirred evenly to form a wine-red transparent solution, and their mass ratio is triblock copolymer: water-soluble phenolic resin: concentrated hydrochloric acid: titanium Acid tetra-n-butyl ester=1:0.25:0.5:1.7;

[0037] (22) Transfer the solution prepared in step (21) to a flat-bottomed container, perform solvent evaporation at 40°C to induce self-assembly for 24 hours, and then thermally polymerize at 120°C for 24 hours to obtain a wine red film;

[0038] (23) The burgundy film obtained in step (22) is first kept at 350° C. for 5 hours in an atmosphere tube furnace with nitrogen, and then kept at 400° C. for 4 hours in an atmosphere tube furnace with air. Strictly controlled at 1°C / min, and finally white ordered mesoporous titanium dioxide powder is obtained;

[0039]...

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Abstract

The invention discloses a preparation method and application of an ordered mesoporous titania-nanometer gold composite material. The preparation method comprises dissolving a triblock copolymer, a water-soluble phenolic resin, tetrabutyl titanate and concentrated hydrochloric acid in ethanol according to a certain proportion, inducing a self-assembling process through solvent evaporation, and carrying out two high temperature treatment processes to obtain the lavender ordered mesoporous titania-nanometer gold composite material. The ordered mesoporous titania-nanometer gold composite material has visible light response, a large specific surface area and even channels and has a wide application prospect in the field of photocatalytic carbon dioxide reduction.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and specifically refers to a preparation method and application of an ordered mesoporous titanium dioxide-nano gold composite material responsive to visible light. Background technique [0002] Due to the shortage of fossil fuels and the problem of global warming, the reduction of carbon dioxide has gradually become an increasingly important research field (Nat. Geosci., 2009, 2, 831–836.). In recent decades, scientists have made unremitting efforts to develop new technologies for carbon dioxide reduction, including: biological conversion, thermal catalysis, electrocatalysis, artificial photosynthesis, photoelectric catalysis and photothermal catalysis. Compared with other technologies, artificial photosynthesis faces the greatest challenge, because the thermodynamics of carbon dioxide is very stable, organic small molecules (CH 4 , CO) production is still very low (Angew.Chem.I...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J21/06B01J35/02C07C1/02C07C9/04
CPCC07C1/02B01J21/063B01J23/52C07C2523/52C07C2521/06B01J35/40B01J35/647B01J35/39C07C9/04
Inventor 王涛冯亚亚范晓莉龚浩高斌郭虎何建平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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