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Preparation method of two-dimensional cu-mof derived porous carbon nanosheets

A technology of porous carbon and nanosheets, applied in the field of electrochemistry, can solve problems such as two-dimensional layer stacking

Inactive Publication Date: 2020-10-16
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

2D MOFs have strong in-plane crystallinity and are ideal prototypes for 2D materials, but 2D layers are easily stacked by weak out-of-plane van der Waals forces

Method used

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  • Preparation method of two-dimensional cu-mof derived porous carbon nanosheets
  • Preparation method of two-dimensional cu-mof derived porous carbon nanosheets
  • Preparation method of two-dimensional cu-mof derived porous carbon nanosheets

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Embodiment

[0034] 1.1{[Cu(bib) 2 (NO 3 )(H 2 O)] (NO 3 )(H 2 O) 0.5} ∞ Synthesis of (Cu-MOF) Crystals

[0035] Cu-MOF crystals are prepared by solvent diffusion method, specifically: 6ml bib (12.6mg, 0.06mmol) of CHCl 3 The solution was placed at the bottom of the test tube, and 8 mL of a mixed solvent (1:1) composed of methanol and trichloride was slowly added as a buffer layer, and then Cu(NO 3 ) 2 ·3H 2 O (7.25mg, 0.03mmol) in methanol solution (6ml), seal the test tube and place it in a quiet corner. After standing for a month at room temperature, a blue blocky single crystal appears in the buffer layer. After the whole is filtered, use absolute ethanol Wash and dry naturally to collect crystals. IR(KBr,cm -1 ):ν=3427(s), 3427(s), 3133(m), 2362(w), 1633(m), 1530(s), 1385(s), 1326(m), 1304(s), 1247 (m), 1134(w), 1068(m), 961(w), 835(m), 747(m), 653(m); elemental analysis calculated value (C 48 h 46 Cu 2 N 20 o 15 ): C45.39, H 3.65, N 22.06; Found: C 45.12, H3.73, N 21...

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Abstract

The invention discloses a method for preparing porous carbon nanosheets derived from two-dimensional Cu‑MOF. 3 OH / CHCl 3 system, through Cu II The self-assembly of ions and bib synthesized a novel Cu-MOF with a two-dimensional (4,4) layer structure, and then used the Cu-MOF as a precursor to obtain Cu@C composites by calcination-pyrolysis. Subsequently, Cu@C was etched with hydrochloric acid and further activated with KOH to prepare Cu@C with high specific surface area (2491m 2 g ‑1 ) and pore volume (1.50cm 3 g ‑1 ) of APC nanosheets. The invention greatly improves the specific surface area and pore volume of the carbon material, and enhances the performance of the supercapacitor.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing porous carbon nanosheets derived from two-dimensional Cu-MOF. Background technique [0002] Renewable energy technologies such as tidal energy, solar energy, and wind energy have made great progress in ensuring the future energy needs of human society. However, the widespread utilization of these intermittent energy sources requires highly developed energy storage devices. A supercapacitor is a new type of energy storage system that combines the advantages of traditional capacitors and batteries. It can be charged and discharged quickly in a short period of time, so it is often used as a promising candidate for the development of portable electronic devices and hybrid vehicles. Prioritize objects. Electrochemical double-layer capacitors (EDLCs), which mainly use porous carbon materials (activated carbon, carbon nanotubes, graphene, etc.) as electrodes, hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/36H01G11/86
CPCH01G11/30H01G11/32H01G11/36H01G11/86Y02E60/13
Inventor 李佐习杨博龙岳慢丽段慧慧
Owner NORTHWEST UNIV
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