Method for preparing titanium dioxide doped platinum catalyst

Abstract

The invention discloses a method for preparing a titanium dioxide doped platinum catalyst. The method comprises the following steps: preparing a platinum ion alcohol solution, namely, preparing the platinum ion alcohol solution from polyvinylpyrrolidone as an additive, performing a sealed reaction for 4-8 hours, and naturally cooling to the room temperature so as to obtain a reaction alcohol solution; putting the reaction alcohol solution into a vacuum distillation device, performing vacuum distillation for 2-8 hours so as to obtain a concentrated solution; slowly putting distilled water intothe concentrated solution, uniformly stirring till stable suspended precipitate is formed, and filtering so as to obtain nano platinum granules; stirring nano titanium dioxide, putting into the nano platinum granules, putting into deionized water, performing ball-milling, and performing a stirring reaction for 2-5 hours under radiation of an ultraviolet lamp so as to obtain a suspension; filteringthe suspension so as to obtain precipitate, and sequentially washing the precipitate with absolute ethyl alcohol, methanol and deionized water, thereby obtaining the titanium dioxide doped platinum catalyst. The catalyst prepared by using the method is good in acid-alkali stability and excellent in photoelectric property, and the catalysis efficiency of a noble metal catalyst is improved.

Description

technical field

[0001] The invention belongs to the technical field of noble metal catalysts, and in particular relates to a preparation method of a titanium dioxide-doped platinum catalyst. Background technique

[0002] At present, a precious metal catalyst is a precious metal material that can change the speed of a chemical reaction without itself participating in the final product of the reaction. Almost all noble metals can be used as catalysts, but platinum, palladium, rhodium, silver, ruthenium, etc. are commonly used, among which platinum and rhodium are the most widely used. Their d electron orbitals are not filled, the surface is easy to adsorb reactants, and the strength is moderate, which is conducive to the formation of intermediate "active compounds", has high catalytic activity, and also has comprehensive excellent properties such as high temperature resistance, oxidation resistance, and corrosion resistance. , to be the most important catalyst material. Pt i...

Examples

Embodiment 1

[0033] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0034] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0035] Step 2, adding polyvinylpyrrolidone as an additive to the alcohol solution, ultrasonically stirring for 30 minutes until platinum particles are formed in the alcohol solution, sealing the reaction for 4 hours, and naturally cooling to room temperature to obtain the reaction alcohol solution;

[0036] Step 3, putting the reaction alcohol liquid into a vacuum distillation device, and distilling it under reduced pressure for 2 hours to obtain a concentrated solution;

[0037] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0038] Step 5...

Embodiment 2

[0050] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0051] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0052] Step 2, adding polyvinylpyrrolidone as an additive to the alcohol solution, ultrasonically agitating for 45 minutes until platinum particles are formed in the alcohol solution, sealing the reaction for 4 hours, and naturally cooling to room temperature to obtain the reaction alcohol solution;

[0053] Step 3, putting the reaction alcohol liquid into a vacuum distillation device, and distilling it under reduced pressure for 2 hours to obtain a concentrated solution;

[0054] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0055]Step 5...

Embodiment 3

[0067] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0068] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0069] Step 2: Add polyvinylpyrrolidone as an additive to the alcohol solution, and ultrasonically stir for 40 minutes until the platinum particle alcohol solution is formed, seal the reaction for 6 hours, and naturally cool to room temperature to obtain the reaction alcohol solution;

[0070] Step 3, put the reaction alcohol solution into a vacuum distillation device, and conduct vacuum distillation for 5 hours to obtain a concentrated solution;

[0071] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0072] Step 5, stirring and adding nan...

technical field

[0001] The invention belongs to the technical field of noble metal catalysts, and in particular relates to a preparation method of a titanium dioxide-doped platinum catalyst. Background technique

[0002] At present, a precious metal catalyst is a precious metal material that can change the speed of a chemical reaction without itself participating in the final product of the reaction. Almost all noble metals can be used as catalysts, but platinum, palladium, rhodium, silver, ruthenium, etc. are commonly used, among which platinum and rhodium are the most widely used. Their d electron orbitals are not filled, the surface is easy to adsorb reactants, and the strength is moderate, which is conducive to the formation of intermediate "active compounds", has high catalytic activity, and also has comprehensive excellent properties such as high temperature resistance, oxidation resistance, and corrosion resistance. , to be the most important catalyst material. Pt i...

Examples

Embodiment 1

[0033] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0034] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0035] Step 2, adding polyvinylpyrrolidone as an additive to the alcohol solution, ultrasonically stirring for 30 minutes until platinum particles are formed in the alcohol solution, sealing the reaction for 4 hours, and naturally cooling to room temperature to obtain the reaction alcohol solution;

[0036] Step 3, putting the reaction alcohol liquid into a vacuum distillation device, and distilling it under reduced pressure for 2 hours to obtain a concentrated solution;

[0037] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0038] Step 5...

Embodiment 2

[0050] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0051] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0052] Step 2, adding polyvinylpyrrolidone as an additive to the alcohol solution, ultrasonically agitating for 45 minutes until platinum particles are formed in the alcohol solution, sealing the reaction for 4 hours, and naturally cooling to room temperature to obtain the reaction alcohol solution;

[0053] Step 3, putting the reaction alcohol liquid into a vacuum distillation device, and distilling it under reduced pressure for 2 hours to obtain a concentrated solution;

[0054] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0055]Step 5...

Embodiment 3

[0067] A method for preparing a titanium dioxide-titanium-doped platinum catalyst, characterized in that: the preparation steps are as follows:

[0068] Step 1, adding platinum acetate to absolute ethanol, then adding a small amount of acidulant, and stirring to form a platinum ion alcohol solution;

[0069] Step 2: Add polyvinylpyrrolidone as an additive to the alcohol solution, and ultrasonically stir for 40 minutes until the platinum particle alcohol solution is formed, seal the reaction for 6 hours, and naturally cool to room temperature to obtain the reaction alcohol solution;

[0070] Step 3, put the reaction alcohol solution into a vacuum distillation device, and conduct vacuum distillation for 5 hours to obtain a concentrated solution;

[0071] Step 4, slowly adding distilled water to the concentrated solution, stirring evenly until a stable suspended precipitate is formed, and obtaining platinum nanoparticles after filtration;

[0072] Step 5, stirring and adding nan...