Porous Carbon Synthesis via Carbide Precursor Conversion
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Solution Overview
Problem
Current methods fail to produce porous carbon materials with a high specific surface area that includes both micropores and mesopores, particularly mesopores of 2 nm or more, which are essential for various industrial applications such as gas storage and semiconductor uses.
Innovation Solution
A method involving the synthesis of carbide compounds with specific metal compositions, such as Ti, V, Cr, Zr, Nb, Mo, W, Hf, and Ta, followed by reaction with halogen gas and subsequent heating under a hydrogen atmosphere to create porous carbon with controlled pore sizes and surface areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional CDC synthesis methods are used with traditional carbides, then micropores of 2 nm or less are produced, but mesopores of 2 nm or more cannot be formed
Solution Approach 1:
The invention changes the chemical composition parameters of the carbide precursor by incorporating metal atoms with specific electronegativity values (1.5 or higher) and controlling the C:M atomic ratio to 2:1 or higher. This parameter change enables the formation of mesopores while maintaining micropore structure, resolving the contradiction between pore size control and application versatility
Solution Approach 2:
The invention uses composite carbide materials combining specific metal elements (Ti, V, Cr, Zr, Nb, Mo, W, Hf, Ta) with carbon in controlled ratios. This composite approach creates a dual-pore structure that accommodates both micropore and mesopore requirements for different industrial applications simultaneously
2Quantity of substance
If high porosity is achieved to increase specific surface area, then adsorption capacity improves, but structural stability may be compromised
Solution Approach 1:
The invention optimizes the C:M atomic ratio to 2:1 or higher and controls the metal composition with electronegativity ≥1.5, which creates a balanced structure where high porosity (specific surface area ≥400 m²/g) is maintained while structural stability is preserved through the specific atomic arrangement and bonding characteristics of the composite carbide structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting porous carbon effectively incorporates both micropores and mesopores, enhancing its applicability in fields requiring large and small pore sizes, including hydrogen storage, medical therapeutics, and supercapacitor electrodes, with a specific surface area of 400 m2/g or more.
Implementation Method 1
reacting the carbide compound with halogen gas
Implementation Method 2
heating the reaction mixture under hydrogen atmosphere
Implementation Method 3
heating the reaction mixture under hydrogen atmosphere
Data Source
AI summary
This disclosure relates to porous carbon and a method of preparing the same. The porous carbon of the present invention is derived from a carbide compound having a composition comprising metal and oxide. The porous carbon of the present invention comprises both micropores and mesopores, and has large specific surface area, and thus, may be usefully used in various fields.