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In-situ preparation method of mesoporous alumina loaded with platinum nanoparticles

A technology of mesoporous alumina and platinum nanoparticles, which is applied in the field of nanomaterials, can solve the problems of easy agglomeration of nano metal particles and insufficient dispersion of nano metal particles, and achieves easy technology mastery, is conducive to technology promotion and application, and low investment cost. Effect

Active Publication Date: 2015-04-01
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional process for preparing nanoparticle-loaded mesoporous oxides still faces two outstanding problems: the dispersion degree of nano-metal particles is not high enough and the nano-metal particles are easy to agglomerate during preparation and use.

Method used

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  • In-situ preparation method of mesoporous alumina loaded with platinum nanoparticles
  • In-situ preparation method of mesoporous alumina loaded with platinum nanoparticles
  • In-situ preparation method of mesoporous alumina loaded with platinum nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Preparation of Al-Pt binary alloy

[0025] (1) Take 216 mm of platinum wire with a diameter of 0.5 mm and fix it on a pure Al target with a diameter of 50 mm in 5 sections to make an Al-Pt composite target;

[0026] (2) Take another pure Al target with a diameter of 50 mm as the second target;

[0027] (3) Put the two targets into the sample chamber, set the sputtering current of the pure Al target to 320mA, the sputtering current of the Al-Pt composite target to 110mA, and the magnetron sputtering time to 10min. A layer of Al-Pt binary alloy is sputtered on the substrate;

[0028] (4) Observing the surface morphology of the Al-Pt binary alloy with a field emission scanning electron microscope, such as figure 1 shown;

[0029] (5) Adopt microdissection technique to prepare transmission electron microscope sample (sample nominal thickness 15nm), then carry out tissue observation on transmission electron microscope, as figure 2 As shown, the thickness of the Al-Pt...

Embodiment 2

[0037] a. Preparation of Al-Pt binary alloy

[0038] The preparation process of the Al-Pt binary alloy is the same as step a in Example 1.

[0039] b. Preparation of Platinum Nanoparticles Supported Mesoporous Alumina

[0040] (1) is the same as (1) in the b step in embodiment 1.

[0041] (2) is the same as (2) in the b step in embodiment 1.

[0042] (3) Carry out anodic oxidation on the potentiostat: put the sealed sample into the prepared sulfuric acid aqueous solution and connect with the positive pole of the power supply; connect the negative pole of the power supply with the ring-shaped pure aluminum sheet; use saturated calomel electrode as the Reference electrode: anodized at a constant potential of 3V (OCP) for 20min to prepare platinum nanoparticles supported mesoporous alumina.

[0043] (4) Field emission scanning electron microscopy was used to observe the surface morphology of platinum nanoparticles loaded mesoporous alumina, as shown in Figure 5As shown, the ...

Embodiment 3

[0046] a. Preparation of Al-Pt binary alloy

[0047] (1) Take 95 mm of platinum wire with a diameter of 1 mm and fix it on a pure Al target with a diameter of 50 mm in two sections to make an Al-Pt composite target;

[0048] (2) Take another pure Al target with a diameter of 50 mm as the second target;

[0049] (3) Put the two targets into the sample chamber, set the sputtering current of the pure Al target to 200mA, the sputtering current of the Al-Pt composite target to 200mA, and the magnetron sputtering time to 15min. A layer of Al-Pt binary alloy is sputtered on the substrate, wherein the thickness of the Al-Pt binary alloy is about 165 nm, and the composition (atomic percentage) is 96.5% Al, 3.5% Pt.

[0050] b. Anodized Al-Pt binary alloy

[0051] (1) get the concentrated sulfuric acid (density is 1.84g / cm3) that concentration is 98.3% 3 ) 0.32ml, slowly added to an appropriate amount of deionized water to prepare a 0.6M sulfuric acid aqueous solution;

[0052] (2) ...

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Abstract

The invention belongs to the technical field of nanomaterials, provides an in-situ preparation method of mesoporous alumina loaded with platinum nanoparticles by adopting a magnetron sputtering and anodizing duplex technology, and aims to provide a productionmethod of mesoporous aluminawhich is loaded with platinum nanoparticles and has the advantages of simple process, low cost, good dispersibilityof nano particles and low probability of agglomeration of nano particles. The technical scheme is that the in-situ preparation method of mesoporous alumina loaded with the platinum nanoparticles comprises two steps including preparation of an Al-Pt binary alloy and anodizing. The mesoporous alumina loaded with the platinum nanoparticles and prepared with the method has the characteristics of simple process, low cost, good dispersibility of nano particles, low probability of agglomeration of the nano particles and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a method for in-situ preparation of platinum nanoparticle-supported mesoporous alumina by means of dual technology of magnetron sputtering and anodic oxidation. Background technique [0002] Mesoporous material (Mesoporous material) generally refers to a porous material with a pore size distribution of 2-50 nm. Because mesoporous materials have broad application prospects in the fields of catalysts, ion exchange, sensors, etc., they have attracted the attention of material researchers. However, these applications of mesoporous materials depend on some special properties that mesoporous materials do not have. The special properties of mesoporous materials can be achieved by introducing nanoparticles with special functions into mesoporous materials, such as Pd and Pt nanoparticles used in the field of catalysts, Fe and its oxide particles used in the field of magnetic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/14C25D11/08
CPCC23C14/165C23C14/3464C23C14/35C25D11/08
Inventor 麻彦龙黄伟九孟晓敏陈小丽易雅楠
Owner CHONGQING UNIV OF TECH
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