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A kind of platinum/titanium dioxide nano flower composite material and its preparation method and application

A technology of titanium dioxide and composite materials, applied in the fields of nanomaterials and photocatalysis, can solve the problems of internal composite limitation, low photocatalytic hydrogen production efficiency, etc. Effect

Active Publication Date: 2020-04-24
ZHEJIANG UNIV CITY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems by depositing small-sized metal platinum nanoparticles on the surface of titanium dioxide nanoflowers, which solves the problem that the internal recombination of titanium dioxide photogenerated carriers seriously limits its photocatalytic hydrogen production efficiency in the prior art

Method used

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  • A kind of platinum/titanium dioxide nano flower composite material and its preparation method and application
  • A kind of platinum/titanium dioxide nano flower composite material and its preparation method and application
  • A kind of platinum/titanium dioxide nano flower composite material and its preparation method and application

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Embodiment 1

[0020] Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in an oven at 60°C, and dried for 24 hours. Finally, the reactant was placed in a muffle furnace with a heating rate of 1°C / min and a temperature of 425°C. Annealed for 2 hours to obtain the precursor titania nanoflower material.

[0021] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.297 mL of chloroplatinic acid solution containing 2.97 mg of chloroplatinic acid. Keep the temperature of the solution water bath at 80° C., and the reaction time is 2 ho...

Embodiment 2

[0027] Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in an oven at 60°C, and dried for 24 hours. Finally, the reactant was placed in a muffle furnace with a heating rate of 1°C / min and a temperature of 425°C. Annealed for 2 hours to obtain the precursor titania nanoflower material.

[0028] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.595 mL of chloroplatinic acid solution containing 5.95 mg of chloroplatinic acid. Keep the temperature of the solution water bath at 100° C., and the reaction time is 5 h...

Embodiment 3

[0032] Step 1: Add 0.125 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 4.5 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 220° C. for 36 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in an oven at 60°C, and dried for 24 hours. Finally, the reactant was placed in a muffle furnace with a heating rate of 10°C / min and a temperature of 425°C. Annealed for 2 hours to obtain the precursor titania nanoflower material.

[0033] Step 2: Take 100 mg of the precursor titanium dioxide nanoflowers and add it to 50 mL of deionized water, and add 0.297 mL of chloroplatinic acid solution containing 2.97 mg of chloroplatinic acid. Keep the temperature of the solution water bath at 80° C., and the reaction time is 2 hou...

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Abstract

The invention discloses a method for preparing a platinum / titanium dioxide nanoflower composite material. The platinum / titanium dioxide nanoflower composite material prepared by the invention is composed of titanium dioxide nanoflowers and platinum nanoparticles, in which the titanium dioxide nanoflowers provide a large specific surface area and are rich in content. Contains a large number of oxygen vacancies. The reducing properties of oxygen vacancies are used to uniformly deposit platinum nanoparticles on the surface of the dioxide nanoflowers, with close interface contact between the two. The platinum / titanium dioxide nanoflower composite material of the present invention is an efficient and stable photoelectric conversion material. It adopts a one-step simple reduction method, and the platinum ion reduction process does not involve any reducing agent. The preparation method is simple to operate, environmentally friendly, and has good reaction conditions. Mild, low energy consumption, easy to promote and use.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and photocatalysis, and relates to a platinum nanoparticle composite material deposited on the surface of titanium dioxide nanoflowers, a preparation method and application thereof. Background technique [0002] As an emerging advanced redox technology, photocatalysis has the advantages of low energy consumption, simple operation, non-toxic and harmless, and no secondary pollution. It has broad application prospects. With the development of nanotechnology in recent years, semiconductor photocatalysts have attracted great attention. [0003] Due to its high chemical stability, light corrosion resistance, strong oxidation ability, high photocatalytic reaction driving force, and high photocatalytic activity, traditional titanium dioxide photocatalysts can realize and accelerate some endothermic chemical reactions on the surface of titanium dioxide irradiated by light. In addition, it is non-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J35/00B01J35/02
CPCB01J23/42B01J35/00B01J35/30B01J35/39
Inventor 胡海华曹小华
Owner ZHEJIANG UNIV CITY COLLEGE
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