Preparation method of single-layer gold film capable of being used for photocatalytic degradation of 4-nitrophenol

A nitrophenol, photocatalytic technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, physical/chemical process catalysts, etc., can solve problems such as environmental pollution, toxicity of hydroxylamine hydrochloride, etc. The effect of loss, strong adhesion and stable performance

Active Publication Date: 2018-11-30
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydroxylamine hydrochloride is toxic and easily pollutes the environment

Method used

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  • Preparation method of single-layer gold film capable of being used for photocatalytic degradation of 4-nitrophenol
  • Preparation method of single-layer gold film capable of being used for photocatalytic degradation of 4-nitrophenol
  • Preparation method of single-layer gold film capable of being used for photocatalytic degradation of 4-nitrophenol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a single-layer gold film that can be used for photocatalytic degradation of 4-nitrophenol provided in this embodiment specifically includes the following steps:

[0039] (1) Put glass balls with a diameter of 2.5 mm into a vessel and wash them for 3 times, each time for 10 minutes, and then dry them naturally for later use;

[0040] (2) Utilize 3-aminopropyltriethoxysilane and dehydrated alcohol to mix according to the volume ratio 1:100 the glass ball obtained in step (1), let stand for 24 hours, make the glass ball surface band Positive electricity;

[0041] (3) Wash the positively charged glass ball with 20 mL of absolute ethanol for 3 times, each time for 10 minutes to remove excess 3-aminopropyltriethoxysilane, and let it dry naturally;

[0042] (4) Soak the glass ball obtained in step (3) in the gold nanoparticle sol for 1 hour, and carry out electrostatic self-assembly, so that the surface of the glass ball evenly adsorbs gold species;

...

Embodiment 2

[0047] A method for preparing a single-layer gold film that can be used for photocatalytic degradation of 4-nitrophenol provided in this embodiment specifically includes the following steps:

[0048] (1) Put glass balls with a diameter of 4mm into a container and wash them for 3 times, each time for 10 minutes, and then dry them naturally for later use;

[0049] (2) Utilize 3-aminopropyltriethoxysilane and dehydrated alcohol to mix according to the volume ratio 1:100 the glass ball obtained in step (1), let stand for 24 hours, make the glass ball surface band Positive electricity;

[0050] (3) Wash the positively charged glass ball with 20 mL of absolute ethanol for 3 times, each time for 10 minutes to remove excess 3-aminopropyltriethoxysilane, and let it dry naturally;

[0051] (4) Soak the glass balls obtained in step (3) in the gold nanoparticle sol for 1.5 hours, and carry out electrostatic self-assembly, so that the surface of the glass balls evenly adsorbs gold species...

Embodiment 3

[0056] A method for preparing a single-layer gold film that can be used for photocatalytic degradation of 4-nitrophenol provided in this embodiment specifically includes the following steps:

[0057] (1) Put glass balls with a diameter of 5.5 mm into a vessel and wash them 3 times, each time for 10 minutes, and then dry them naturally for later use;

[0058] (2) Utilize 3-aminopropyltriethoxysilane and dehydrated alcohol to mix according to the volume ratio 1:100 the glass ball obtained in step (1), let stand for 24 hours, make the glass ball surface band Positive electricity;

[0059] (3) Wash the positively charged glass ball with 20 mL of absolute ethanol for 3 times, each time for 10 minutes to remove excess 3-aminopropyltriethoxysilane, and let it dry naturally;

[0060] (4) Soak the glass ball obtained in step (3) in the gold nanoparticle sol for 2 hours, and carry out electrostatic self-assembly, so that the surface of the glass ball evenly adsorbs gold species;

[00...

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Abstract

The invention discloses a preparation method of a single-layer gold film capable of being used for photocatalytic degradation of 4-nitrophenol. The preparation method specifically comprises the following steps: firstly preparing glass balls with positive charge on the surfaces, and a gold nanoparticle sol; soaking the glass balls into the gold nanoparticle sol for electrostatic self-assembly; andthen taking out the glass balls, putting the glass balls into a fiveleaf akebia fruit extracting solution, and adding a chloroauric acid water solution for soaking to prepare the single-layer gold membrane. According to the invention, the positively charged glass balls and negatively charged gold nanoparticles are mutually attracted, so that the gold nanoparticles are attached to the surfaces of the glass balls to form gold seeds. The fiveleaf akebia fruit extracting solution which is easily obtained, has a low price, and is easily stored is used for replacing a conventional toxic hydroxylamine hydrochloride as a reducing agent for preparing the single-layer gold film, so that the prepared single-layer gold film is stable in performance, high in adhesion capability, and uniform in film thickness and can be repeatedly used. The invention provides a new synthesis way for the preparation of other single-layer metal films, and overcomes the defect that tiny particles are easy to lose and difficult to recycle in a using process.

Description

technical field [0001] The invention relates to a method for preparing a single-layer gold film that can be used for photocatalytic degradation of 4-nitrophenol, and belongs to the technical field of nanoparticle catalyst preparation. Background technique [0002] p-nitrophenol (p-nitrophenol), also known as 4-nitrophenol (4-nitrophenol), nitrophenol has three isomers, namely o-, m-, p-nitrophenol. P-nitrophenol is colorless or light yellow crystal at room temperature, soluble in hot water, ethanol, ether, easily soluble in caustic alkali, and turns yellow in alkali metal carbonate solution. It is easily oxidized in the air, making the color darker. It is unstable at high temperature and begins to decompose when heated to 273°C. P-nitrophenol is flammable, toxic, and can cause allergies when absorbed through the skin. Toxic effects on humans are not fully understood. Animal experiment results: It has stimulating and inhibitory effects on the central nervous system and va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J35/06B82Y30/00C02F1/30C02F101/38C02F101/34
CPCB01J23/52B01J35/004B01J35/065B82Y30/00C02F1/30C02F2101/345C02F2101/38C02F2305/10
Inventor 孙丽刘茜茜李浩男李传亮周明亮李迎春朱佳诚
Owner UNIV OF SHANGHAI FOR SCI & TECH
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