Composite material of stannic oxide and carbon, and preparation method thereof

A composite material and tin dioxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problems of complex organic solvent preparation process and unfavorable recovery, etc. Achieve the effects of avoiding adverse effects, low cost, and large application prospects

Inactive Publication Date: 2009-06-24
JIANGSU HAIYU MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of nano-tin dioxide / carbon composite materials in the prior art that require high-temperature calcination or use of organic solvents or complex preparation processes and are not conducive to recovery, and provide a nano-tin dioxide that is prepared under low temperature conditions and is conducive to recovery. Composite material of tin and carbon and preparation method thereof

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  • Composite material of stannic oxide and carbon, and preparation method thereof
  • Composite material of stannic oxide and carbon, and preparation method thereof

Examples

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preparation example Construction

[0017] According to the preparation method provided by the present invention, the preparation method of the surface oxidized carbon fiber is to contact the carbon fiber with an oxidizing agent. The oxidizing agent can be any substance capable of oxidizing the surface of the carbon fiber to generate electronegative -COOH, -CO and -O functional groups, preferably one of nitric acid and sulfuric acid, more preferably nitric acid. The concentration of described nitric acid and sulfuric acid is not particularly limited, as long as carbon fiber surface can be made to generate electronegative -COOH, -CO and -O functional groups, generally speaking, described nitric acid can be commercially available concentrated nitric acid (concentration is 65% by weight); the sulfuric acid can be commercially available concentrated sulfuric acid (concentration is 98% by weight). Based on 1 gram of carbon fiber, the amount of the oxidizing agent is 50-200 milliliters.

[0018] The time for the carb...

Embodiment 1

[0031] This example is used to illustrate the preparation of nano tin dioxide / carbon composite material of the present invention.

[0032] (1) Surface removal of carbon fiber

[0033] At room temperature, 0.5 g of carbon fiber ( figure 1 As its SEM image, the average diameter is 8 microns, and the average length is 4 mm) soaked in 50 milliliters of acetone solution for 24 hours. Then, the carbon fibers were washed 5 times with 50 ml of deionized water. The water was removed by suction filtration, and the carbon fibers were dried at 100°C until constant weight.

[0034] (2) Surface oxidation of carbon fiber

[0035] At room temperature, the carbon fibers obtained in step (1) were immersed in 75 ml of concentrated nitric acid solution (65% by weight), ultrasonically oscillated (30 KHz) for 20 minutes, and then soaked at room temperature for 10 hours. Then, the carbon fibers were washed 5 times with 50 ml of deionized water. The water was removed by suction filtration, and t...

Embodiment 2

[0040] This example is used to illustrate the preparation of nano tin dioxide / carbon composite material of the present invention.

[0041] (1) Surface removal of carbon fiber

[0042] With embodiment 1 step (1).

[0043] (2) Surface oxidation of carbon fiber

[0044] With embodiment 1 step (2), difference is that the consumption of concentrated nitric acid is 150 milliliters, and soaking time is changed into 50 hours by 10 hours.

[0045] (3) According to the method described in embodiment 1 step (3), the difference is that the concentration of the sodium hydroxide solution used is 0.5 mol / liter, and the volume is 300 milliliters.

[0046] (4) According to the method described in embodiment 1 step (4), the difference is that the concentration of the tin tetrachloride solution used is 0.12 mol / liter, and the consumption is 30 milliliters, and the rate of addition is 1.5 milliliters / minute.

[0047] (5) With embodiment 1 step (5), product is denoted as A2, and the mean partic...

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Abstract

The invention discloses a tin dioxide/carbon composite material, which contains nanometer tin dioxide and carbon, wherein the carbon is carbon fiber, and the nanometer tin dioxide is coated on the surface of the carbon fiber. A method for preparing the nanometer tin dioxide/carbon composite material comprises the following steps that: the carbon fiber with oxidized surface contacts an alkaline solution and then contacts tin tetrachloride under alkaline conditions. The method adopts a low-temperature condition to treat the tin dioxide/carbon fiber composite material, thereby effectively avoiding the adverse effect on carbon materials and tin dioxide nano-particles caused by high-temperature treatment. The method has the advantages of simple and convenient process, no pollution of solvents, convenient operation, and low cost. An effective constituent, namely the nanometer tin dioxide of photocatalysis is adhered to the carbon fiber with micron size, so the composite material is easy to recover.

Description

technical field [0001] The invention relates to a composite material of tin dioxide and carbon and a preparation method thereof. Background technique [0002] Utilizing the photocatalysis of semiconductors (titanium dioxide, tin dioxide, zinc oxide, etc.) can effectively degrade and eliminate harmful pollutants in the environment. The technology has the advantages of low energy consumption, simple operation, mild reaction conditions, strong reaction specificity and selectivity. A large number of studies have shown that this method can be used to treat various dye wastewater, pesticide wastewater, surfactant wastewater, oily wastewater, and various halogenated substances (such as chloroform, carbon tetrachloride, chlorinated phenol and Freon, etc.) and heavy metal ion wastewater . [0003] Nanoscale materials have many properties that the original bulk materials do not have in terms of optical, electrical, magnetic and catalytic properties. Tin dioxide is one of the import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J21/18
Inventor 许静谭伟华林宏业宫清
Owner JIANGSU HAIYU MACHINERY
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