Can graphene be recycled?
Answers from top 10 papers
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| Papers (10) | Insight |
|---|---|
| More importantly, the graphene oxide can be easily recovered by washing and recycled seven times without loss of catalytic activity. | |
23 Citations | Furthermore, the proposed graphene quantum dot could be recycled via a simple CO2 bubbling method. |
8 Citations | Recycling experiments show that the graphene-supported systems cannot be recycled, while the other ones can. |
126 Citations | Moreover, we found that the graphitic cathode materials from the used rechargeable AIBs can be completely recycled as graphene products through a facile treatment of electrolysis. |
10 Citations | This is a reversible process, such that pristine graphene can be recovered by thermal treatment. |
| We demonstrate that graphene oxide can be reversibly reduced and oxidized using electrical stimulus. | |
85 Citations | The Cu2O layer is mechanically and chemically weak; hence, graphene films can be detached and transferred to arbitrary substrates and the Cu substrates could be re-used for graphene growth. |
| Graphene oxide can be reduced by different methods. | |
96 Citations | In addition, the sheet resistance of graphene transferred by recycled PSAF does not change considerably up to 4 times, which would be advantageous for more cost-effective and environmentally friendly production of large-area graphene films for practical applications. |
| Thus, it can be easily reduced to graphene that is no longer dominated by defects. |
Related Questions
How does the process of battery recycling contribute to the recovery of graphite ?5 answersThe process of battery recycling contributes to the recovery of graphite by utilizing various methods to separate and purify the graphite from spent lithium-ion batteries (LIBs). These methods include leaching-curing with organic acid, pretreatment and flotation, microwave-assisted removal of impurities and structure repair, and mechanical, thermomechanical, and electrohydraulic fragmentation followed by froth flotation. Through these processes, the unwanted elements and impurities in the graphite are removed, and the graphite is restored to its layered crystal structure with expanded interlayer distance. The recovered graphite exhibits high purity and can be used in various applications, including supercapacitors. The recycling of graphite from spent LIBs is important for the sustainable development of the LIB industry and the efficient utilization of valuable carbon material.
What are the main challenges and opportunities in recycling polymers?4 answersThe main challenges in recycling polymers include the high energy consumption and use of toxic chemicals in conventional recycling methods. Additionally, the non-biodegradability of certain polymers, such as epoxy resins, poses a challenge for their recycling. Other challenges include secondary material contamination, recycling processing issues, production processing issues, production material quality issues, and end-product quality issues. However, there are also opportunities in polymer recycling. Chemical recycling methods, such as low-temperature pyrolysis, catalytic degradation, and hydrothermal liquefaction, offer a more sustainable approach to recycling polymers. Effective secondary material management, innovation in chemical recycling, production and processability, innovative materials, and innovative end-products are some of the opportunities in polymer recycling. The transition to a circular economy for plastics can be facilitated by chemical recycling on a monomer-level. Intensified research is needed to address the challenges and develop knowledge-based methods for process development and evaluation in chemical recycling.
How can recycled fibers be used to create new materials?4 answersRecycled fibers can be used to create new materials by reusing textile waste in the construction field. The development of innovative and sustainable materials is important to reduce energy consumption and prevent resource depletion in the construction sector. Nonwoven fabrics made from textile waste can be manufactured and treated to have similar properties as commercial products, such as vapor-barriers and rain-screens. Resizing recycled fibers can enhance their compatibility with thermoplastic matrices, allowing them to be used as replacements for virgin fibers in the automotive industry. Carbon fibers reclaimed from aeronautical scrap material can be used in structural components for the automotive sector, resulting in lower production costs and greener composites. The optimization of fiber parameters, such as volume fraction and length, can enhance the strength and shrinkage resistance of materials made from textile fabric waste. Recycled fibers can also be used in hybrid fiber reinforced composites to improve product quality and sustainability in the cement-based sector.
Recycled waste plastic materials?5 answersRecycled waste plastic materials can be used in the building and construction sector as a viable solution to reduce environmental accumulation and enhance sustainability. Plastics can be used alone or in combination with other materials to make various building and construction materials such as bricks, blocks, tiles, asphalt, and insulation materials. The recycling process involves processing waste plastic material, drying it, blending it with other non-plastic materials, melting the blended material, and forming it into pellets or extruding it to form a product. The usage of recycled plastic blends with demolition aggregates has shown promising results in terms of enhancing the degradation resistance and energy absorption characteristics of railway capping materials. Various recycling methods for plastic waste have been classified as primary, secondary, tertiary, and quaternary, each with its own advantages and technical challenges. Recycling plastic waste has the potential to reduce pollution, landfilling costs, and the carbon footprint of infrastructure projects.
What are the pros and cons of recycled plastic?5 answersRecycled plastic has several pros and cons. On the positive side, recycling waste plastics can help mitigate plastic pollution and reduce the risks to human health caused by improper disposal. It also contributes to the development of tribological products like lubricating oils, providing a safer alternative to disposing of plastics in the environment. Additionally, recycling plastic can lead to the production of value-added products and materials, promoting sustainable development and green environmental protection. On the negative side, the recycling process often requires high labor costs and produces contaminated water, which can be a challenge to manage. Furthermore, there are limitations to plastic recycling, including the need for improved technologies for regeneration and recovery, as well as the relatively low percentage of plastic waste being regenerated/recycled globally.
How to recycling solar cell ?2 answersSolar cell recycling methods vary based on the specific approach. One method involves separating the organic film layer from the solar cell, forming a de-encapsulated solar cell. Passivation treatment is then performed on the de-encapsulated solar cell using a surface treatment agent, followed by leaching treatment to separate the stainless steel substrate and the active material layer. Another method includes using alkaline and acid solutions to remove aluminum and silver layers from the solar cell, and then using a hydrofluoric acid solution to remove the silicon nitride reflection layer. A solar cell panel recycling device has been developed, which includes units for transferring, cleaning, drying, dismantling, detecting, and storing waste solar cell panels. A recycling method for a solar battery module involves mechanically removing the back sheet, removing the solar battery cells, and then removing the remaining seal layer through immersion in a solution. Another method includes vertically dipping a waste solar cell module in a reaction bath, emitting an ultrasonic wave, and collecting the separated materials.