Oxidized plumbago of loading nanometer metallic silver corpuscle and its preparing method

A nano-metallic silver and graphite technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc. The industrial application of graphite composites and other issues can achieve the effects of reducing agglomeration, increasing specific surface area, good application prospects and economic benefits

Inactive Publication Date: 2008-04-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these coatings and packages also make the coated particles unable to effectively exert their unique properties, such as catalytic performance, and...

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  • Oxidized plumbago of loading nanometer metallic silver corpuscle and its preparing method

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Embodiment 1

[0025] Embodiment 1: the method for the preparation of the graphite oxide of the present invention loaded nano-metallic silver particle, comprises the following steps:

[0026] The first step is the preparation of graphite oxide. Cool 460mL of concentrated sulfuric acid containing 10g of sodium nitrate to 0-5°C, then add 20g of graphite into it, then slowly add potassium permanganate so that the temperature of the system does not exceed 20°C, stir well and put in 30-35 In a water bath at ℃, after stirring for a certain period of time, slowly add 4.6L of deionized water so that the temperature of the system does not exceed 98 ℃, and then stir for 10 minutes. Add 2.8L of deionized water, and then add 50mL of hydrogen peroxide. The resulting yellow suspension was centrifuged until the filtrate was free of sulfate ions. The product was dried under vacuum at 60°C.

[0027] In the second step, ultrasonically disperse 50 mg of graphite oxide into 50 mL of N,N-dimethylformamide and...

Embodiment 2

[0031] Embodiment 2: the method for preparing the graphite oxide of the present invention loaded nano-metallic silver particle, comprises the following steps:

[0032] The first step is the same as step one in Example 1;

[0033] In the second step, ultrasonically disperse 15 mg of graphite oxide into 50 mL of N,N-dimethylformamide for 1 to 2 hours;

[0034] In the third step, add 1.5 mL of 0.05 mol / mL silver nitrate solution to the mixed solution in the second step, and stir for 0.5 to 1 hour;

[0035] In the fourth step, the mixture obtained in the third step was reacted in a dark room at 60° C. for 1 day.

[0036] The fifth step is the same as step five in Example 1.

Embodiment 3

[0037] Embodiment 3: the method for the preparation of the graphite oxide of the present invention loaded nano-metallic silver particle, comprises the following steps:

[0038] The first step is the same as step one in Example 1;

[0039] The second step is the same as step one in Example 1;

[0040] In the third step, add 0.5 mL of 0.1 mol / mL silver nitrate solution to the mixed solution in the second step, and stir for 0.5 to 1 hour;

[0041] In the fourth step, the mixed solution obtained in the third step was reacted in a dark room at 100° C. for 2 hours.

[0042] The fifth step is the same as step five in Example 1.

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PUM

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Abstract

The present invention discloses a graphite oxide loading the nano metallic silver particle and the preparing method thereof. The graphite oxide is prepared by the following procedures: adding the graphite oxide into the dispersing agent to do ultrasonic dispersion and the mixed liquid forms; adding the silver salt solution to the mixed liquid prepared in the last procedure and stirring; doing stirring at the condition of darkroom condition; centrifugation, washing and vacuum furnace drying the mixed liquid obtained in the last procedure and the graphite oxide loading the nano metallic silver particle is obtained. The present invention fully uses the oxygen group on the surface of the graphite oxide to form the nucleation center, and the more surface area of the graphite oxide piece is used to facilitate that the nano metallic particles can uniformly subsides on the graphite oxide piece thereby reducing the agglomeration property of the particle and increasing the specific surface area of the particle; the composition prepared by the invention is combined with the property of graphite oxide and the metallic elemental silver, has a better application prospect and economic benefit in the fields of biological medicine and catalyzing, etc.

Description

technical field [0001] The invention belongs to the preparation technology of depositing nano-particle silver on the surface of graphite oxide, in particular to graphite oxide loaded with nano-metal silver particles and a preparation method thereof. Background technique [0002] After Brodie prepared graphite oxide in 1859, graphite oxide has been widely studied. [0003] At present, there are few reports on the articles on the supported particles of graphite oxide. The material similar to graphite oxide: acid-treated carbon nanotubes (with active oxygen groups on the surface) have been researched on the composite with nanoparticles. Composite with many metals, metal oxides and semiconductor particles respectively, these composites have high catalytic performance and give full play to the performance of carbon nanotubes and supported particles. The surface of graphite oxide is also rich in a large number of oxygen functional groups, and the graphite oxide after exfoliation...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J21/18B01J37/02
Inventor 汪信徐超朱俊武杨绪杰刘孝恒陆路德武晓东郝青丽韩巧凤江晓红
Owner NANJING UNIV OF SCI & TECH
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