Photocatalytic material and preparation method and application thereof

A photocatalytic material and reaction technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, catalysts for physical/chemical processes, etc. Favorable for electron transfer, wide absorption range, mild reaction conditions

Active Publication Date: 2016-07-13
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 The forbidden band width of TiO is relatively large, it is only active in the ultraviolet region, and ultraviolet light only accounts for 4% of the total energy of sunlight, which limits the TiO 2 Applications in the field of photocatalysis

Method used

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  • Photocatalytic material and preparation method and application thereof
  • Photocatalytic material and preparation method and application thereof
  • Photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this embodiment, the photocatalytic material is prepared by the following method, which specifically includes the following steps:

[0051] (1) Take 20 μL of 5nM gold nanorod stock solution, add water to 1 mL, centrifuge to remove the supernatant, and add cetyltrimethylammonium bromide (CTAB) solution with a concentration of 50 mM to the precipitate to 1 mL;

[0052] (2) Prepare a 1000 μM cysteine ​​solution, add 100 μL of the solution to the solution in step (1), and place it in a water bath at 30° C. for 24 hours;

[0053] (3) After the water bath is completed, centrifuge the mixed solution, remove the supernatant, add water to 1 mL, and then add concentrated ammonia water (25% to 28%) to adjust the pH to 12; 10 μL of tetraisopropyl titanate (TTIP ) into 10 mL of isopropanol and mix evenly, take 10 μL of the mixed solution and add it to the solution of step (3), shake slightly, and react for 24 hours to obtain the photocatalytic material.

[0054] Utilize transmis...

Embodiment 2

[0057] In this embodiment, the photocatalytic material is prepared by the following method, which specifically includes the following steps:

[0058] (1) Take 20 μL of 5nM gold nanorod stock solution, add water to 1 mL, centrifuge to remove the supernatant, and add cetyltrimethylammonium bromide (CTAB) solution with a concentration of 10 mM to the precipitate to 1 mL;

[0059] (2) Prepare a 500 μM reduced glutathione solution, add 100 μL of the solution to the solution in step (1), and then place it in a water bath at 30° C. for 24 hours;

[0060] (3) After the water bath is completed, centrifuge the mixed solution, remove the supernatant, add water to 1 mL, and then add concentrated ammonia water (25% to 28%) to adjust the pH to 11; 10 μL of tetraisopropyl titanate (TTIP ) into 10 mL of isopropanol and mix evenly, take 10 μL of the mixed solution and add it to the solution of step (3), shake slightly, and react for 24 hours to obtain the photocatalytic material.

[0061] The...

Embodiment 3

[0063] In this embodiment, the photocatalytic material is prepared by the following method, which specifically includes the following steps:

[0064] (1) Take 20 μL of 5nM gold nanorod stock solution, add water to 1 mL, centrifuge to remove the supernatant, and add cetyltrimethylammonium bromide (CTAB) solution with a concentration of 50 mM to the precipitate to 1 mL;

[0065] (2) Prepare a 1000 μM cysteine ​​solution, add 100 μL of the solution to the solution in step (1), and then place it in a water bath at 30° C. for 24 hours;

[0066] (3) After the water bath is completed, centrifuge the mixed solution, remove the supernatant, add water to 1 mL, then add concentrated ammonia water (25% to 28%) to adjust the pH to 11; dissolve 10 μL of tetrabutyl titanate (TBOT) Add it into 20 mL of isopropanol and mix evenly, take 10 μL of the mixed solution and add it to the solution in step (3), shake slightly, and react for 24 hours to obtain the photocatalytic material.

[0067] The ...

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Abstract

The invention provides a photocatalytic material and a preparation method and application thereof. According to the photocatalytic material, nano titanium oxide covers a gold nano rod to form a core-shell structure; the nano titanium oxide is chemically bonded with modifying molecules on the surface of the gold nano rod to cover the surface of the gold nano rod. According to the photocatalytic material, organic molecules containing sulfydryl and carboxyl modify the whole surface of the gold nano rod, to prepare nano titanium oxide; under the mutual action between a modifying molecule group on the surface of the gold nano rod and a surface group of the nano titanium oxide, the nano titanium oxide covers the gold nano rod, to obtain the photocatalytic material with the core-shell structure. The thickness of the coverage layer of the nano titanium oxide in the photocatalytic material with the core-shell structure is adjustable, so that the structure is stable and the light absorption performance is excellent; furthermore, the preparation method is simple, the reaction conditions are mild, and environment friendliness is realized; the photocatalytic material is expected to be applied to various aspects such as photocatalysis, solar batteries, and photoelectric conversion, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a photocatalytic material and a preparation method and application thereof. Background technique [0002] As an n-type photocatalytic semiconductor, titanium oxide has the advantages of cheap, stable, non-toxic and environmentally friendly, and has been widely used in environmental purification, self-cleaning, hydrogen production, photochemical synthesis, CO 2 Reduction, organic synthesis and solar cells and other aspects of research. As a wide-bandgap semiconductor (Eg=3.2ev), titanium oxide only responds to ultraviolet light (≈5%), which limits its photocatalytic application. For example, Fujishima et al. discovered TiO in 1972 2 Under the condition of ultraviolet light, it can be used for photolysis of water to produce hydrogen, thus creating a new field of using semiconductors for photolysis of water. However, due to TiO 2 The forbidden band width of TiO is rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J21/06B82Y30/00
CPCB01J21/063B01J23/52B01J35/004B82Y30/00
Inventor 朴玲钰司月雷吴志娇张驰
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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