Biomass Graphene from Cellulose via Catalytic Deoxidation
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Solution Overview
Problem
Existing graphene preparation methods face challenges such as complicated processes, poor production safety, high costs, harsh reaction conditions, and low yields, making industrial-scale production difficult.
Innovation Solution
A method for producing biomass graphene using cellulose as a raw material, involving the preparation of a catalyst solution, high-temperature deoxidation, heat treatment, and acid treatment, which results in high-yield, high-quality graphene with controlled properties and improved safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical vapor deposition (CVD) method is used to synthesize graphene, then electronic device quality is improved, but production cost increases and yield decreases
Solution Approach 1:
The patent changes the fundamental parameters of the synthesis method by using cellulose-based biomass as raw material instead of traditional graphite or hydrocarbon sources, and employs a catalytic conversion process with metal salts (FeCl3, CuCl2, NiCl2) at controlled temperatures (600-900°C) to produce high-quality graphene with improved yield and reduced cost
Solution Approach 2:
The patent uses inexpensive cellulose biomass (corn cobs, stalks, other agricultural waste) as the carbon source instead of expensive precursors, and employs simple ceramic tube furnaces rather than complex CVD equipment, achieving cost-effective graphene production suitable for large-scale application
2Productivity
If reducing graphite oxide method is used to synthesize graphene, then production scale can be increased, but environmental pollution increases and cost increases
Solution Approach 1:
The patent converts abundant agricultural waste (corn cobs and stalks) that would otherwise be burned and cause severe air pollution into valuable graphene material. The catalytic conversion process transforms the carbon in biomass into graphene sheets, turning an environmental hazard into a beneficial product with high value application potential
Solution Approach 2:
The patent introduces metal salt catalysts (FeCl3, CuCl2, NiCl2) as intermediaries to facilitate the conversion of cellulose to graphene. These catalysts enable the reaction to proceed under milder conditions without requiring strong oxidizing agents, thus avoiding the environmental pollution associated with traditional graphite oxide reduction methods
3Productivity
If comprehensive measures are implemented for biomass utilization, then resource efficiency is improved, but production cost increases
Solution Approach 1:
The patent uses a universal catalytic system with simple metal salts that can process various types of cellulose-containing biomass (corn cobs, stalks, and other agricultural waste) to produce graphene. This multi-functional approach allows flexible use of different feedstocks without requiring complex preprocessing or specialized equipment, maintaining low production costs while improving resource efficiency
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 method achieves a yield of above 99% graphene with uniform size and high conductivity, suitable for various applications, while using green and non-toxic materials, reducing production costs and enabling industrial-scale production.
Implementation Method 1
under the action of a catalyst, carrying out catalytic treatment on a biomass carbon source to obtain a first intermediate product
Implementation Method 2
heating the first intermediate product from first temperature to second temperature, and holding to obtain a second intermediate product
Implementation Method 3
heating the precursor from room temperature to target temperature at a constant heating speed, and keeping at the target temperature
Data Source
Figure 1
Figure 2~3
AI summary
Provided is a method for preparing biomass graphene by using cellulose as a raw material. The method comprises: preparing a catalyst solution; carrying out ionic coordination and high-temperature deoxidization on cellulose and a catalyst, so as to obtain a precursor; carrying out thermal treatment and pre-carbonization; and carrying out acid treatment and drying to obtain the graphene. The method is simple, low in cost, high in production, high in production safety, and controllable in product dimensions and other physical properties. The graphene is uniform in morphology, has a single-layer or multi-layer two-dimensional layered structure; the dimension is 0.5 µm to 2 µm; and the electric conductivity of 25000 S/m to 45000 S/m. The graphene can be applied to electrode materials of super capacitors and lithium ion batteries, and can also be added to resin and rubber as an additive so as to improve physical properties of the resin and the rubber.