Platinum nanoparticle coating and preparation method thereof

Abstract

The invention relates to a platinum nanoparticle coating and a preparation method thereof, and the preparation method comprises the following steps: carrying out cleaning and drying pretreatment on a pre-selected substrate; dissolving a platinum salt in an organic solvent to obtain a platinum precursor solution with a predetermined concentration; adding a surfactant into deionized water, uniformly stirring to obtain an active agent solution with a predetermined concentration, adding the active agent solution into the platinum precursor solution, and reacting at 50-90 DEG C for 1-3 hours to obtain a platinum nanoparticle solution; and immersing the pretreated substrate in a platinum nanoparticle solution, carrying out dip coating at a dip speed of 1-5 mm / s at a coating temperature of 20-60 DEG C, and drying in a nitrogen atmosphere to obtain the platinum nanoparticle coating. According to the preparation method, the platinum nanoparticles with uniform particle size and good dispersity can be prepared by controlling the reaction conditions and the types of the surfactants, and the coating is prepared by adopting a dip coating method, so that the adhesive force and uniformity of the coating can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of nano coating preparation, in particular to a platinum nano particle coating and a preparation method thereof. Background Art

[0002] Platinum nanoparticles have broad application prospects in catalysis, sensors, biomedicine and other fields due to their unique physical and chemical properties. However, traditional methods for preparing platinum nanoparticles often have problems such as uneven particle size, poor dispersibility, and low coating adhesion, which limit their practical applications. Therefore, it is of great significance to develop a simple, efficient, and controllable method for preparing platinum nanoparticle coatings. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a platinum nanoparticle coating and a preparation method thereof, which has the advantages of being able to prepare a platinum nanoparticle coating with uniform particle size, good dispersibility and strong coating adhesion.

[0004] To achieve the above objectives and other related objectives, the present invention provides the following technical solutions: In a first aspect of an embodiment of the present invention, a method for preparing a platinum nanoparticle coating is provided, comprising: Pre-treating the pre-selected substrate by washing and drying; dissolving a platinum salt in an organic solvent to obtain a platinum precursor solution of a predetermined concentration; Adding a surfactant to deionized water, stirring evenly to obtain an active agent solution of a predetermined concentration, and adding the active agent solution to the platinum precursor solution to react at a temperature of 50-90° C. for 1-3 hours to obtain a platinum nanoparticle solution; The pretreated substrate is immersed in the platinum nanoparticle solution, and the coating is carried out at a coating temperature of 20-60° C. and a pulling speed of 1-5 mm / s, and the substrate is dried in a nitrogen atmosphere to obtain a platinum nanoparticle coating.

[0005] As a preferred embodiment of the invention, the substrate is one of a silicon wafer substrate, a glass substrate and a ceramic substrate.

[0006] As a preferred embodiment of the invention, the pre-selected substrate is cleaned and dried pre-treated as follows: The preselected substrates were ultrasonically cleaned with acetone, ethanol, and deionized water in sequence and then dried under a nitrogen atmosphere.

[0007] As a preferred embodiment of the invention, the platinum salt is one of chloroplatinic acid, potassium chloroplatinate or sodium chloroplatinate.

[0008] As a preferred embodiment of the invention, the organic solvent is one of ethanol, acetone or isopropanol.

[0009] As a preferred embodiment of the invention, the surfactant is one of hexadecyltrimethylammonium bromide, sodium lauryl sulfate or polyvinylpyrrolidone.

[0010] According to a second aspect of the embodiments of the present invention, a platinum nanoparticle coating is provided, which is prepared by the preparation method described in the first aspect.

[0011] As described above, the present invention has the following beneficial effects: The embodiment of the present invention provides a platinum nanoparticle coating and a preparation method thereof, wherein the preparation method includes: washing and drying a preselected substrate; dissolving a platinum salt in an organic solvent to obtain a platinum precursor solution of a predetermined concentration; adding a surfactant to deionized water, stirring evenly to obtain an active agent solution of a predetermined concentration, and adding the active agent solution to the platinum precursor solution to react for 1-3 hours at a temperature of 50-90°C to obtain a platinum nanoparticle solution; immersing the pretreated substrate in the platinum nanoparticle solution, pulling and coating at a pulling speed of 1-5 mm / s under a coating temperature of 20-60°C, and drying under a nitrogen atmosphere to obtain a platinum nanoparticle coating. The preparation method adopted by the present invention is simple and easy to operate, does not require complex equipment and process conditions, and can prepare platinum nanoparticles with uniform particle size and good dispersibility by controlling the reaction conditions and the type of surfactant, and the coating is prepared by the method of pulling and coating, which can improve the adhesion and uniformity of the coating. DETAILED DESCRIPTION

[0012] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0013] A first aspect of an embodiment of the present invention provides a method for preparing a platinum nanoparticle coating, comprising: S100, performing cleaning and drying pretreatment on a preselected substrate, wherein the substrate is one of a silicon wafer substrate, a glass substrate and a ceramic substrate.

[0014] The pre-treatment of cleaning and drying the pre-selected substrate is specifically as follows: the pre-selected substrate is ultrasonically cleaned with acetone, ethanol and deionized water in sequence, and then dried in a nitrogen atmosphere.

[0015] S200, dissolving a platinum salt in an organic solvent to obtain a platinum precursor solution of a predetermined concentration, wherein the platinum salt is one of chloroplatinic acid, potassium chloroplatinate or sodium chloroplatinate, and the organic solvent is one of ethanol, acetone or isopropanol.

[0016] S300, adding a surfactant into deionized water, stirring evenly to obtain an active agent solution of a predetermined concentration, and adding the active agent solution into the platinum precursor solution to react at a temperature of 50-90° C. for 1-3 hours to obtain a platinum nanoparticle solution; wherein the surfactant is one of hexadecyltrimethylammonium bromide, sodium dodecyl sulfate or polyvinylpyrrolidone.

[0017] S400, immersing the pretreated substrate in the platinum nanoparticle solution, performing coating by pulling at a pulling speed of 1-5 mm / s under a coating temperature of 20-60° C., and drying under a nitrogen atmosphere to obtain a platinum nanoparticle coating.

[0018] A second aspect of an embodiment of the present invention provides a platinum nanoparticle coating, which is prepared by the preparation method described in the first aspect.

[0019] To clearly illustrate the present invention, some specific embodiments are described below: Embodiment 1

[0020] S100, ultrasonically cleaning the preselected silicon wafer substrate with acetone, ethanol and deionized water for 15 minutes each, and then drying it in a nitrogen atmosphere.

[0021] S200. Dissolve 0.1 g of chloroplatinic acid in 10 mL of ethanol to obtain a platinum precursor solution.

[0022] S300, adding 0.1 g of hexadecyltrimethylammonium bromide to 50 mL of deionized water, stirring evenly to obtain an active agent solution, and adding the active agent solution to the platinum precursor solution to react at 80° C. for 2 h to obtain a platinum nanoparticle solution.

[0023] S400, immersing the pretreated silicon wafer substrate in the platinum nanoparticle solution, performing pulling coating at a coating temperature of 50° C. at a pulling speed of 3 mm / s, and drying in a nitrogen atmosphere to obtain a platinum nanoparticle coating. Embodiment 2

[0024] S100, ultrasonically cleaning the preselected glass substrate with acetone, ethanol and deionized water for 15 minutes each, and then drying it in a nitrogen atmosphere.

[0025] S200. Dissolve 0.1 g potassium chloroplatinate in 10 mL acetone to obtain a platinum precursor solution.

[0026] S300, adding 0.1 g of sodium dodecyl sulfate into 50 mL of deionized water, stirring evenly to obtain an active agent solution, and adding the active agent solution into the platinum precursor solution to react at 70° C. for 2.5 h to obtain a platinum nanoparticle solution.

[0027] S400, immersing the pretreated glass substrate in the platinum nanoparticle solution, performing coating by pulling at a coating temperature of 40° C. at a pulling speed of 2 mm / s, and drying in a nitrogen atmosphere to obtain a platinum nanoparticle coating. Embodiment 3

[0028] S100, ultrasonically cleaning the preselected ceramic substrate with acetone, ethanol and deionized water for 15 minutes each, and then drying it in a nitrogen atmosphere.

[0029] S200. Dissolve 0.1 g of sodium chloroplatinate in 10 mL of isopropanol to obtain a platinum precursor solution.

[0030] S300, adding 0.1 g of polyvinyl pyrrolidone into 50 mL of deionized water, stirring evenly to obtain an active agent solution, and adding the active agent solution to the platinum precursor solution to react at 90° C. for 1 h to obtain a platinum nanoparticle solution.

[0031] S400, immersing the pretreated glass substrate in the platinum nanoparticle solution, performing coating by pulling at a coating temperature of 60° C. and a pulling speed of 5 mm / s, and drying in a nitrogen atmosphere to obtain a platinum nanoparticle coating.

[0032] The preparation method adopted by the present invention is simple and easy to operate, does not require complicated equipment and process conditions, and can prepare platinum nanoparticles with uniform particle size and good dispersibility by controlling the reaction conditions and the type of surfactant. The coating is prepared by a pulling coating method, which can improve the adhesion and uniformity of the coating.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing a platinum nanoparticle coating, characterized in that: include: Pre-treating the pre-selected substrate by washing and drying; dissolving a platinum salt in an organic solvent to obtain a platinum precursor solution of a predetermined concentration; Adding a surfactant to deionized water, stirring evenly to obtain an active agent solution of a predetermined concentration, and adding the active agent solution to the platinum precursor solution to react at a temperature of 50-90° C. for 1-3 hours to obtain a platinum nanoparticle solution; The pretreated substrate is immersed in the platinum nanoparticle solution, and the coating is carried out at a pulling speed of 1-5 mm / s under a coating temperature of 20-60° C., and dried in a nitrogen atmosphere to obtain a platinum nanoparticle coating.

2. The method for preparing a platinum nanoparticle coating according to claim 1, characterized in that: The substrate is one of a silicon wafer substrate, a glass substrate and a ceramic substrate.

3. The method for preparing the platinum nanoparticle coating according to claim 1, characterized in that: The cleaning and drying pretreatment of the preselected substrate is specifically as follows: The preselected substrates were ultrasonically cleaned with acetone, ethanol, and deionized water in sequence and then dried under a nitrogen atmosphere.

4. The method for preparing a platinum nanoparticle coating according to claim 1, characterized in that: The platinum salt is one of chloroplatinic acid, potassium chloroplatinate or sodium chloroplatinate.

5. The method for preparing the platinum nanoparticle coating according to claim 1, characterized in that: The organic solvent is one of ethanol, acetone or isopropanol.

6. The method for preparing a platinum nanoparticle coating according to claim 1, characterized in that: The surfactant is one of hexadecyltrimethylammonium bromide, sodium lauryl sulfate or polyvinyl pyrrolidone.

7. A platinum nanoparticle coating, characterized in that: Prepared by the preparation method described in any one of claims 1 to 6.