We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Preparation of high quality carbon nanotubes by catalytic pyrolysis of waste plastics using FeNi-based catalyst
Summary
Researchers developed a method to produce high-quality carbon nanotubes from waste polyethylene plastics using iron-nickel catalysts. The study found that varying the catalyst composition affected nanotube quality and yield, demonstrating a promising approach for converting plastic waste into valuable nanomaterials rather than allowing it to persist as pollution.
Plastic waste pollution is the serious environmental problem, and catalytic pyrolysis of waste plastics is an effective way to solve this problem. Carbon nanotubes (CNTs) are prepared by catalytic pyrolysis of low-density polyethylene (LDPE) waste plastics by one-stage method using iron nitrate and nickel nitrate as catalyst. The growth mechanism of CNTs is analyzed in detail. TPO, XRD, SEM and Raman analyses show that increasing Ni content contributes to the production of CNTs with good morphology and high graphitization degree. While the increasing Fe content contributes to improving the yield of CNTs. The outer and inner diameters of the FeNi12-CNTs-800 are about 21 nm and 8 nm with the length of 18.9 μm, respectively. LDPE pyrolysis gases are analyzed to determine that the primary carbon source required for CNTs growth is CH. The CH adsorption and decomposition processes on FeNi alloys are performed to reveal the growth mechanism of CNTs, based on density functional theory calculation. Three kinds of the growth models are proposed to explain the difference of the CNTs tubular shape. FeNi12-CNTs-800 are used to remove microplastics from wastewater due to existence of magnetic. PVC can be quickly removed from wastewater with removal of 100 % at 20 min. This study provides an effective way for recycling and treatment of waste plastic.
Sign in to start a discussion.
More Papers Like This
Upcycling 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.