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61,005 resultsShowing papers similar to Preparation of high quality carbon nanotubes by catalytic pyrolysis of waste plastics using FeNi-based catalyst
ClearUpcycling Waste Plastics into Multi-Walled Carbon Nanotube Composites via NiCo2O4 Catalytic Pyrolysis
Researchers used catalytic pyrolysis — heating plastic waste with metal catalysts — to convert post-consumer plastics into carbon nanotube composites, a high-value industrial material. Bimetallic nickel-cobalt catalysts produced the best results. This approach could help valorize plastic waste while reducing the volumes that end up in the environment as microplastic pollution.
Carbon nanotubes production from real-world waste plastics and the pyrolysis behaviour
Researchers produced carbon nanotubes from real-world waste plastics through pyrolysis, characterizing the thermal decomposition behavior of mixed plastic waste and demonstrating a valuable upcycling pathway for plastic pollution.
Synthesis of Multi-Walled Carbon Nanotubes from Plastic Waste Using a Stainless-Steel CVD Reactor as Catalyst
Carbon nanotubes were successfully synthesized from polypropylene plastic waste using a simple reactor, turning plastic waste into a high-value nanomaterial. This approach could provide an economically attractive way to deal with plastic waste while creating useful materials.
Hydrogen and Carbon Nanotubes from Pyrolysis-Catalysis of Waste Plastics: A Review
This review examines how pyrolysis of waste plastics coupled with steam reforming or catalytic processes can produce hydrogen gas and high-quality carbon nanotubes, covering different reactor designs and catalyst types. The work highlights waste plastics as a potentially valuable feedstock for generating both clean energy and advanced carbon materials.
Plastic-derived substrate-grown carbon nanotubes as freestanding electrode for hydrogen evolution in alkaline media
Plastic waste was converted into carbon nanotubes via pyrolysis and used as a high-performance electrode for hydrogen production, demonstrating a circular economy pathway that transforms plastic pollution into a clean energy material.
Novel concept for synthesizing carbon nano-onion, graphene layers, and graphene nano-ribbons from polypropylene waste over Fe2O3 nanoparticles
Researchers developed a novel method for synthesizing carbon nano-onions, graphene layers, and graphene nano-ribbons from polypropylene waste using iron oxide nanoparticle catalysts produced under different fuel conditions. The study found that the optimal catalyst achieved a 280% yield of highly graphitized few-layer graphene, demonstrating a potential way to convert plastic waste into valuable carbon nanomaterials.
Structure-oriented conversions of plastics to carbon nanomaterials
This review examines strategies for converting waste plastics into carbon nanomaterials including nanotubes, graphene, and porous carbon, highlighting how different plastic structures influence the resulting carbon products and offering a promising approach to reduce plastic pollution.
Production of combustible fuels and carbon nanotubes from plastic wastes using an in-situ catalytic microwave pyrolysis process
Researchers developed an in-situ catalytic microwave pyrolysis process using ZSM-5 catalyst to convert plastic waste into hydrogen, liquid fuel, and carbon nanotubes, demonstrating a promising route for both energy recovery and valuable material production from plastic pollution.
Efficient catalytic upcycling of polyester and polycarbonate plastics using NNN-based iron catalyst
Researchers developed an efficient catalytic system using an NNN-based iron pincer catalyst to depolymerize polyester and polycarbonate plastics via hydrogenative methods, enabling either methanolysis into ester monomers or transfer hydrogenation into value-added products. The system provides an eco-friendly alternative for chemical upcycling of plastic waste, addressing the significant environmental burden of polyester accumulation.
From Waste to Worth: Upcycling Plastic into High-Value Carbon-Based Nanomaterials
This study reviewed innovative methods for converting plastic waste into high-value carbon-based nanomaterials like graphene and carbon nanotubes. Researchers examined several techniques including pyrolysis, chemical vapor deposition, and flash joule heating, finding that thermal decomposition is currently the most scalable approach for industrial applications. The study suggests that turning plastic waste into advanced materials could help address pollution while also creating economically valuable products.
Catalytic transformation of microplastics to functional carbon for catalytic peroxymonosulfate activation: Conversion mechanism and defect of scavenging
Researchers developed a method to convert high-density polyethylene plastic waste into functional carbon materials that can activate peroxymonosulfate to break down organic pollutants in water. Using a salt template-based approach with nickel chloride, they produced carbon nanosheets with high catalytic efficiency. The study demonstrates a promising approach for upcycling plastic waste into useful water purification catalysts.
Upcycling of face masks to application-rich multi- and single-walled carbon nanotubes
Disposable face masks from the COVID-19 pandemic were converted into high-value single-walled and multi-walled carbon nanotubes through a thermal upcycling process. The resulting nanotubes showed properties suitable for use in electronics and materials applications. This approach demonstrates a path for converting pandemic plastic waste into advanced materials rather than landfill.
A Comprehensive Review on the Thermochemical Treatment of Plastic Waste to Produce High Value Products for Different Applications
This review summarizes methods for converting plastic waste into valuable products using high-temperature chemical processes like pyrolysis and plasma technology. These approaches can produce hydrogen fuel, carbon nanotubes, and other useful materials from plastic that would otherwise become pollution. Reducing plastic waste through better recycling technology is important because most microplastic pollution originates from improperly managed plastic products.
Carbon Nanotube prepared by catalytic pyrolysis as the electrode for supercapacitors from polypropylene wasted face masks
Researchers converted discarded polypropylene face masks into carbon nanotubes via catalytic pyrolysis using nickel-iron bimetallic catalysts, producing a bamboo-like nanotube structure with high specific capacitance (56 F/g) and excellent cycling stability that performed well as a supercapacitor electrode material.
Textile microfibers valorization by catalytic hydrothermal carbonization toward high-tech carbonaceous materials
Catalytic hydrothermal carbonization using iron-nickel catalysts successfully converted cotton and polyester textile microfibers into carbon nanostructures including carbon nanotubes, offering a circular economy pathway for the 0.28 million tons of microfibers shed annually during laundry.
Evaluation of Waste-Plastic Pyrolysis Oil as a Potential Feedstock for Lubricant Base Oil Production via Hydroprocessing
Scientists found a way to turn plastic waste into high-quality lubricant oil by heating it up and treating it with special metal catalysts. This process converted over 88% of the waste plastic into useful oil that could replace petroleum-based lubricants. This breakthrough could help reduce plastic pollution while creating valuable products, though more research is needed before it becomes widely available.
Conversion of Polyethylene to Low-Molecular-Weight Oil Products at Moderate Temperatures Using Nickel/Zeolite Nanocatalysts
Incorporating small nickel nanoparticles into zeolite catalysts allowed polyethylene — the world's most widely used plastic — to be broken down into useful low-molecular-weight oils at 350 °C, compared to the 400 °C required without a catalyst. This lower-temperature catalytic process offers a more energy-efficient route to upcycling plastic waste and reducing microplastic pollution from discarded packaging.
Photoreforming of Nonrecyclable Plastic Waste over a Carbon Nitride/Nickel Phosphide Catalyst
A carbon nitride/nickel phosphide photocatalyst was used to photoreform non-recyclable PET and PLA plastic waste at ambient temperature, producing clean hydrogen fuel and organic chemicals without precious metals or toxic components. The study demonstrates a low-energy, scalable approach to converting plastic waste into valuable chemical feedstocks using sunlight.
Dual-Doped Nickel Sulfide for Electro-Upgrading Polyethylene Terephthalate into Valuable Chemicals and Hydrogen Fuel
Researchers developed a catalyst that can convert PET plastic waste into valuable chemicals and clean hydrogen fuel using electricity. By doping nickel sulfide with cobalt and chloride, they achieved high efficiency and selectivity in breaking down a key PET building block. The study demonstrates a promising approach for upcycling plastic waste into useful products rather than sending it to landfills.
Recent Progress in Low-Cost Catalysts for Pyrolysis of Plastic Waste to Fuels
This review evaluated low-cost catalysts — including zeolites, clays, and bimetallic materials — for the pyrolytic conversion of plastic waste into fuel, comparing their effects on product yield and quality and highlighting promising candidates for scaling up plastic-to-fuel processes.
The Chemistry of Carbon Nanotubes in Photocatalytic Degradation of Micro‐ and Nano‐Plastic
Researchers reviewed how carbon nanotubes — cylindrical structures made of carbon atoms — can be added to light-activated catalysts to dramatically improve the breakdown of microplastics and nanoplastics in water, as the nanotubes increase surface area and help separate electrical charges that drive the chemical degradation reactions.
Carbon Nanomaterials from Polyolefin Waste: Effective Catalysts for Quinoline Degradation through Catalytic Wet Peroxide Oxidation
Researchers converted mixed polyolefin plastic waste into carbon nanomaterials and used them as catalysts for quinoline degradation through catalytic wet peroxide oxidation, achieving effective removal of this toxic compound. The approach simultaneously addresses plastic waste accumulation and wastewater treatment challenges using a circular chemistry strategy.
Pyrolysis of Polyethylene Terephthalate over Carbon-Supported Pd Catalyst
Adding a palladium catalyst during PET pyrolysis at a ratio of 0.05 reduced the formation of harmful polycyclic hydrocarbons by up to 44% and biphenyl derivatives by up to 79%, compared to non-catalytic pyrolysis. The results suggest catalytic pyrolysis can make plastic waste chemical recovery safer by suppressing the formation of toxic byproducts.
Charting a path to catalytic upcycling of plastic micro/nano fiber pollution from textiles to produce carbon nanomaterials and turquoise hydrogen
Researchers demonstrated proof-of-concept for catalytic upcycling of polyester and cotton textile-derived microfibers into structured solid carbon products, using a defined fiber feedstock to establish a pathway for converting fiber pollution into value-added carbon materials.