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Preparation method of polymer and palladium-gold nanorod fiber membrane with photocatalytic performance

A nanofiber membrane and polymer technology, applied in chemical instruments and methods, catalysts, catalytic reactions, etc., can solve the problems of low catalytic performance, low loading capacity, and low reaction efficiency, achieve high-efficiency photocatalytic performance, and overcome long-term stability poor sex effect

Inactive Publication Date: 2020-08-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims to provide a method for preparing a photocatalytic polymer and palladium-gold nanorod fiber membrane, which solves the problem of easy aggregation of palladium nanoparticles in the prior art, low loading capacity, low catalytic performance, and low reaction efficiency at room temperature , Difficult to recycle and reuse in aqueous or non-aqueous media

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  • Preparation method of polymer and palladium-gold nanorod fiber membrane with photocatalytic performance
  • Preparation method of polymer and palladium-gold nanorod fiber membrane with photocatalytic performance

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Embodiment 1

[0040] The preparation method of photocatalytic polymer and palladium-gold nanorod fiber membrane, the steps are as follows:

[0041] (1) prepare gold seed solution;

[0042] Sodium borohydride at a temperature of 0°C was added to the growth solution I, stirred for 3 minutes, and then left to stand for 1 hour to obtain a gold seed solution, wherein the growth solution I was composed of cetyltrimethylammonium bromide, chloroauric acid and water, The molar ratio of cetyltrimethylammonium bromide to chloroauric acid is 100:1, and the concentration of chloroauric acid in growth solution I is 1.1×10 -4 M, the mol ratio of sodium borohydride and chloroauric acid is 2:1;

[0043] (2) Adsorb gold seeds on the hydrophilic polymer nanofiber membrane;

[0044] First, dilute the gold seed solution 4 times with water, adjust the pH value of the system to 2 with hydrochloric acid solution, then immerse the hydrophilic polymer nanofiber membrane in it, let it stand at 50°C for 2 hours, and...

Embodiment 2

[0063] The preparation method of photocatalytic polymer and palladium-gold nanorod fiber membrane, the steps are as follows:

[0064] (1) prepare gold seed solution;

[0065] Sodium borohydride at a temperature of 4°C was added to the growth solution I, stirred for 2 minutes, and then left to stand for 2 hours to prepare a gold seed solution, wherein the growth solution I was composed of cetyltrimethylammonium bromide, chloroauric acid and water, The molar ratio of cetyltrimethylammonium bromide to chloroauric acid was 120:1, and the concentration of chloroauric acid in growth solution I was 1.3×10 -4 M, the mol ratio of sodium borohydride and chloroauric acid is 2:1;

[0066] (2) Adsorb gold seeds on the hydrophilic polymer nanofiber membrane;

[0067] First dilute the gold seed solution with water to 2 times, adjust the pH value of the system to 4 with hydrochloric acid solution, then immerse the hydrophilic polymer nanofiber membrane in it, let it stand at 40°C for 3 hour...

Embodiment 3

[0078] The preparation method of photocatalytic polymer and palladium-gold nanorod fiber membrane, the steps are as follows:

[0079] (1) prepare gold seed solution;

[0080] Sodium borohydride at a temperature of 3°C was added to the growth solution I, stirred for 2.5 minutes, and then left to stand for 2 hours to prepare a gold seed solution, wherein the growth solution I was composed of cetyltrimethylammonium bromide, chloroauric acid and water , the molar ratio of hexadecyltrimethylammonium bromide to chloroauric acid is 160:1, and the concentration of chloroauric acid in the growth solution I is 1.5×10 -4 M, the mol ratio of sodium borohydride and chloroauric acid is 3:1;

[0081] (2) Adsorb gold seeds on the hydrophilic polymer nanofiber membrane;

[0082] First, dilute the gold seed solution 3 times with water, adjust the pH value of the system to 3 with hydrochloric acid solution, then immerse the hydrophilic polymer nanofiber membrane in it, let it stand for 3 hours...

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Abstract

The invention relates to a preparation method of a polymer and palladium-gold nanorod fiber membrane with photocatalytic performance, which comprises the following steps: growing gold nanocubes on a hydrophilic polymer nanofiber membrane in situ, and growing palladium nanoparticles on the gold nanocubes in situ to obtain the polymer and palladium-gold nanorod fiber membrane with photocatalytic performance. The method for in-situ growth of the gold nanocubes on the hydrophilic polymer nanofiber membrane comprises the following steps: (1) preparing a gold seed solution; (2) adsorbing gold seedson the hydrophilic polymer nanofiber membrane; and (3) controlling the gold seeds to grow into gold nanocubes in situ. The preparation method is simple, and the problem that palladium nanoparticles inthe prior art are easy to aggregate, low in loading capacity, low in catalytic performance, low in reaction efficiency at the normal temperature and difficult to recycle and reuse in a water-based ornon-water-based medium is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite material preparation, and relates to a method for preparing a photocatalytic macromolecule and palladium-gold nanorod fiber membrane. Background technique [0002] Palladium nanoparticles have been extensively studied due to their potential applications in fields such as catalysis and energy. However, palladium nanoparticles have high surface energy, not only easy to aggregate, but also difficult to recover and reuse in aqueous or non-aqueous media. In addition, the catalytic process of palladium nanoparticles requires heating to promote the reaction, and the reaction efficiency is not high at room temperature. [0003] In order to overcome the problems of palladium nanoparticles, a series of studies have been carried out in the prior art, such as using polymer fibers to support potassium chloropalladate, and then reducing potassium chloropalladate in situ to prepare polymer palladium nanop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J23/52B01J35/06C07C5/11C07C15/073
CPCB01J23/52B01J31/069B01J31/06C07C5/11C07C2531/06B01J2231/645B01J35/396B01J35/59B01J35/39C07C15/073
Inventor 徐林
Owner DONGHUA UNIV