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Polyaniline-graphite nanosheet material

A technology of graphite nanosheets and polyaniline, which is applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of insufficient adsorbent performance and lengthy preparation process.

Inactive Publication Date: 2016-08-17
印度马德拉斯理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some amine ionic liquids have attracted attention due to their good carbon dioxide uptake ability, but the preparation process of such ionic liquids is tedious
In addition, these adsorbents are underperformed since the adsorption capacity is limited around room temperature

Method used

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  • Polyaniline-graphite nanosheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the synthesis of PANI / GNP nanocomposite adsorbent

[0023] Graphite was vigorously mixed with concentrated nitric acid and concentrated sulfuric acid in a volume ratio of 1:3 for three days to form acid-intercalated graphite. The intercalated graphite was thermally exfoliated at 1000 °C to form graphite nanoplatelets (GNPs). GNPs were further treated with concentrated nitric acid to introduce hydrophilic functional groups (-COOH, -C=O, and -OH) on the surface of GNPs. Functionalized GNPs were washed several times with water to achieve pH 7 after drying. Addition of aniline to functionalized GNPs and K 2 Cr 2 o 7 In a mixture of 1 mole of hydrochloric acid, polycondensation of aniline is initiated and polyaniline / graphite nanosheet (PANI / GNP) nanocomposites are formed. The nanocomposite was then filtered and washed with copious amounts of water and then ethanol to remove residual oxidant. Finally, the nanocomposites were washed with acetone and dried ...

Embodiment 2

[0024] Example 2: PANI / GNP adsorption of carbon dioxide

[0025] Carbon dioxide adsorption of PANI / GNP nanocomposites was tested using a Sieverts apparatus at an equilibrium carbon dioxide pressure of 11 bar and a temperature of 100°C. Adsorption capacities were calculated using the ideal gas equation with van der Waals correction. The degree of adsorption was found to be 23.2 mmol carbon dioxide / gram PANI / GNP.

Embodiment 3

[0026] Example 3: Adsorption of carbon dioxide by GNPs without amine polymers

[0027] The uncoated GNPs were tested for carbon dioxide adsorption using a Sieverts apparatus at an equilibrium carbon dioxide pressure of 11 bar and a temperature of 100°C. Adsorption capacities were calculated using the ideal gas equation with van der Waals correction. The degree of adsorption was found to be only 3.5 mmol carbon dioxide / gram GNP.

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Abstract

The present invention describes nanocomposite sorbent materials as well as their preparation and use. As an example, a polyaniline-graphite nanosheet nanocomposite can be used to adsorb carbon dioxide.

Description

technical field [0001] Carbon dioxide adsorbents and methods of making and using them are described. More specifically, some embodiments of the invention relate to polyaniline-graphite nanoplatelet adsorbents of carbon dioxide and methods of making and using them. Background technique [0002] Fossil fuels provide more than 90% of global energy needs. However, the consumption of fossil fuels is one of the main sources of the greenhouse gas carbon dioxide, which is suspected to play an important role in global warming. Existing CO2 capture technologies are quite expensive and energy-intensive, due to the 2 and possible corrosion in the presence of other impurities, prior art also suffers from inherent regeneration costs and inefficiencies. Amine solvents exhibit a high degree of carbon dioxide uptake mainly due to the presence of amine groups. The amine groups chemically interact with carbon dioxide, thereby providing high adsorption capacity. Some amine ionic liquids ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C08G73/02C08K3/04C08K7/22C08L79/02B01D53/02B82Y30/00B82Y40/00C07C209/68C01B32/50
CPCB01J20/20B01D53/02B82Y30/00B82Y40/00C08K3/04C08L79/02C08G61/124C08G73/0206C08G73/0266B01D2253/102B01D2253/202B01D2253/25B01D2253/302B01D2257/504B01D2258/0283C08G2261/3221C08K7/24C08K2201/011B01J20/3085B01J2220/46B01D2253/304B01J20/205B01J20/28016C01B32/50B01J20/262Y02C20/40Y02P20/151
Inventor R·孙达拉拉凯什·库马·米什拉
Owner 印度马德拉斯理工学院