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Self-assembly method of precious metal quantum dot/one-dimensional titanate nanoribbon heterojunction material

A precious metal and quantum dot technology, applied in nanomaterials and nanometer fields, can solve problems such as lack of technical means, and achieve the effect of simple process, high degree of controllability, and low equipment requirements

Active Publication Date: 2011-05-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the degree of dispersion of noble metals on the surface of photocatalyst materials, particle size and interface binding have a significant impact on the enhancement of photocatalytic effect, and there is still a lack of effective technical means.

Method used

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  • Self-assembly method of precious metal quantum dot/one-dimensional titanate nanoribbon heterojunction material
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  • Self-assembly method of precious metal quantum dot/one-dimensional titanate nanoribbon heterojunction material

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Embodiment 1

[0028] The self-assembly method of the photocatalyst material of noble metal quantum dot / one-dimensional titanate nanoribbon heterojunction, it comprises the following steps:

[0029] (1) Take sulfhydryl acetic acid and ethanol, dissolve sulfhydryl acetic acid in ethanol, and configure a concentration of 10 mg / mL sulfhydryl acetic acid solution;

[0030] (2) 0.4g one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) the nanometer belt is immersed in the above-mentioned 0.8g sulfhydryl acetic acid solution, and vacuumized (the degree of vacuum is 10 -1 ~10 -5 ), kept soaking overnight under the Ar gas state, then heat-treated at 100° C. for 2 hours, and washed with acetone to obtain a one-dimensional titanate nanoribbon treated with a phosphonic acid surfactant;

[0031](3) The preparation of Pt noble metal quantum dots is: Weigh 0.1g polyvinylpyrrolidone (PVP), dissolve 10mL chloroplatinic acid (6mmol / L) in 5mL deionized water and 40mL ethanol, stir until mixed; Put the m...

Embodiment 2

[0041] The self-assembly method of the photocatalyst material of noble metal quantum dot / one-dimensional titanate nanoribbon heterojunction, it comprises the following steps:

[0042] (1) Take 3-mercaptopropionic acid and methanol, dissolve 3-mercaptopropionic acid in methanol, and prepare a 3-mercaptopropionic acid solution with a concentration of 30mg / mL;

[0043] (2) 0.4g prepared one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) the nanometer tape is immersed in the above-mentioned 1.0g 3-mercaptopropionic acid solution, and vacuumized (the degree of vacuum is 10 -1 ~10 -5 ), kept soaking overnight under the Ar gas state, then heat-treated at 100° C. for 2 hours, and washed with acetone to obtain a one-dimensional titanate nanoribbon treated with a phosphonic acid surfactant;

[0044] (3) The preparation of Au noble metal quantum dots is as follows: Weigh 0.1gHAuCl 4 Dissolve in 30mL deionized water to get HAuCl 4 Aqueous solution; Weigh 2.187g tetraoctyl ammoniu...

Embodiment 3

[0050] The self-assembly method of the photocatalyst material of noble metal quantum dot / one-dimensional titanate nanoribbon heterojunction, it comprises the following steps:

[0051] 1) Get the phosphonic acid surfactant and solvent, dissolve the phosphonic acid surfactant in the solvent, and configure the phosphonic acid surfactant solution with a concentration of 10 mg / mL; the phosphonic acid surfactant is 3-mercaptopropionic acid; the solvent is ethanol;

[0052] 2) According to the mass ratio of the one-dimensional titanic acid nanobelts and the phosphonic acid surfactant solution as 1:3, the phosphonic acid surfactant solution was selected, and the one-dimensional titanic acid (H 2 Ti 5 o 11 ·3H 2 O) the nanometer belt is immersed in the above-mentioned phosphonic acid surfactant solution, vacuumize (the degree of vacuum is 10 -1 ~10 -5 ), kept soaking overnight under Ar gas state, then heat-treated at 100° C. for 3 hours, and washed with acetone to obtain one-dimen...

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Abstract

The invention relates to a self-assembly method of a photocatalyst material, and relates to a self-assembly method of a precious metal quantum dot / one-dimensional titanate nanoribbon heterojunction material, which is characterized by comprising the following steps of: (1) preparing a phosphonic acid surfactant solution with the concentration of not less than 10mg / mL; (2) obtaining the one-dimensional titanate nanoribbon processed with a phosphonic acid surfactant according to the mass ratio of the one-dimensional titanate nanoribbon to the phosphonic acid surfactant solution being 1:1-1:10; (3) preparing a precious metal quantum dot solution with the concentration of not less than 10mg / mL according to the mass ratio of the precious metal quantum dot to the one-dimensional titanate nanoribbon being 0.1-12 percent; (4) immersing the one-dimensional titanate nanoribbon processed with the phosphonic acid surfactant in the precious metal quantum dot solution to obtain the precious metal quantum dot / one-dimensional titanate nanoribbon heterojunction material with different precious metal contents in a self-assembly mode. The method has simple process and low cost. Moreover, the obtainedphotocatalyst material has prominent photocatalytic enhancement effect.

Description

technical field [0001] The invention relates to a self-assembly method of a photocatalyst material, and belongs to the field of nanomaterials and nanotechnology. Background technique [0002] One-dimensional nanomaterials have increasingly become a research hotspot due to their special nano-sized morphology and structure, which exhibit superior physical properties such as mechanics, optics, electricity, and magnetism. TiO 2 Semiconductor-based nanomaterials have great advantages as photocatalysts, and have good application prospects in environmental protection, clean energy, and green building materials. Studies have shown that under the condition of ultraviolet light, TiO 2 The material can be used as a photocatalyst to effectively decolorize and mineralize macromolecular organic matter, and at the same time decompose it into small inorganic molecules such as water and carbon dioxide. But TiO 2 The material has a wide band gap (3.2eV), and can only use ultraviolet light...

Claims

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Application Information

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IPC IPC(8): B01J27/20B01J23/652B01J23/68B01J37/00B01J35/02B82Y30/00B82Y40/00
Inventor 刘曰利陈文钟蕾舒威周静
Owner WUHAN UNIV OF TECH
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