Waste plastic thermal-transformed CNT@Fe–Mo/MgO for free radical activation and bacteria sterilization

Li, Meng; Yan, Xiangzhe; Su, Lezhu; Dong, Hang; Hu, Zhan; Peng, Yuanqi; Guan, Liqian; Zhang, Junjie; Zhou, Zhi; Zhu, Yi; Zhou, Nan

doi:10.1016/j.jclepro.2022.133794

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…Iron-based catalysts have been demonstrated impressive efficiencies in the conversion of waste plastics to CNTs. 24,25 Our earlier research unveiled the potential of Fe−Co or Fe−Ni bimetallic catalysts to achieve high CNTs yield (up to 38.3%) during the pyrolysis of waste plastics. 26 Iron-based catalysts have also demonstrated their versatility as cost-effective alternatives to rare metals in electrocatalysis applications.…”

Section: Introductionmentioning

confidence: 98%

“…Iron-based catalysts have been demonstrated impressive efficiencies in the conversion of waste plastics to CNTs. , Our earlier research unveiled the potential of Fe–Co or Fe–Ni bimetallic catalysts to achieve high CNTs yield (up to 38.3%) during the pyrolysis of waste plastics . Iron-based catalysts have also demonstrated their versatility as cost-effective alternatives to rare metals in electrocatalysis applications. ,, For instance, Mn–Fe–Ni oxides nanoparticles have been utilized as trimetallic catalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) when supported on multiwalled carbon nanotubes (MWCNTs) .…”

Section: Introductionmentioning

confidence: 99%

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Fe–Co Bimetallic Catalysts for Pyrolysis of Disposable Face Masks and Nitrile Gloves: Synthesis and Characterization of N-Doped Carbon Nanotubes

Li,

Tang,

Yao

et al. 2023

ACS Omega

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The global spread of severe acute respiratory syndrome coronavirus 2 has led to a widespread surge in the use of disposable medical face masks (DFMs) and waste nitrile gloves (WNGs). To address the immense disruption in waste management systems, the catalytic pyrolysis of DFMs and WNGs was undertaken to yield multiwalled carbon nanotubes. Two MgO-supported bimetallic catalysts, Fe−Co and Fe−Ni, were synthesized for catalytic pyrolysis. The MgO-supported Fe and Co catalysts showed a good yield of Ndoped CNTs (N-CNTs) above 33 wt %, while the percentage of WNGs did not exceed 20 wt %. The pyrolysis process resulted in the formation of Fe−Co microspinels, which were subsequently encapsulated within N-CNTs, ultimately yielding FeCo-NCNTs. The synthesized FeCo-NCNTs were approximately 25 nm in diameter and were extended over several micrometers in length. Subsequent evaluations included testing several acidwashed FeCo-NCNTs as catalysts for the oxygen reduction reaction. The FeCo-NCNTs exhibited remarkable catalytic performance, with a half-wave potential at 0.831 V (vs RHE) and exceptional resistance to methanol poisoning. These remarkable findings have the potential to contribute to the sustainable recycling of waste generated during the COVID-19 pandemic and to the utilization of waste-derived materials.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Fe–Co Bimetallic Catalysts for Pyrolysis of Disposable Face Masks and Nitrile Gloves: Synthesis and Characterization of N-Doped Carbon Nanotubes

Li,

Tang,

Yao

et al. 2023

ACS Omega

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“…Due to easy preparation, low cost, high stability, etc., polymer materials have been considered as an indispensable source for industrial and economic development. However, the increasing consumption of polymer materials inevitably leads to the accumulation of solid wastes and serious environmental pollution. , The rational recycling, reduction, and reuse of plastic wastes are crucial to the green and sustainable development and attract more and more attention. − Based on the continuous efforts of scientists and engineers, the efficient and clean disposal of plastic wastes is expected to not only alleviate the environmental crisis but also generate high-value byproducts like CNTs. − The two-stage reaction system has been designed for the conversion of plastic wastes to CNTs: (1) the upper stage promotes the pyrolysis of plastic wastes at 500–700 °C; (2) the lower stage promotes CNTs formation over catalysts at 600–800 °C. − Fe, Co, and Ni catalysts are widely used to tailor CNTs yield, quality, and morphology from plastic wastes. − Guo et al found that the Fe–Al catalyst was more capable of promoting the conversion of phenolic formaldehyde resin to CNTs and obtained a higher yield, purity, and graphitization compared to the Ni–Al catalyst. Veksha et al found that improving the surface area and reducibility of Fe–Al catalyst enhanced the conversion of polyolefins to CNTs.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Fe–Zr, Co–Zr, and Ni–Zr Catalysts to Boost CNTs Synthesis from Plastic Wastes and the Electrocatalytic Oxygen Evolution Reaction

Sun,

Hou,

Dong

et al. 2024

Langmuir

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The efficient conversion of plastic wastes to highvalue carbon materials like carbon nanotubes (CNTs) is one important issue about the rational recycling, reduction, and reuse of solid wastes. Herein, Fe−, Co−, and Ni−Zr catalysts were prepared and used for CNTs synthesis from polyethylene (PE) waste via a two-stage reaction system. At the same time, the effects of the PE/catalyst ratio and reaction temperature on CNTs synthesis have been studied. Compared with Co−Zr and Ni−Zr, Fe−Zr exhibited the best activity in CNTs synthesis from PE, and it achieved the highest CNTs yield of 806.3 mg/g (per gram of Fe−Zr) at 800 °C with a PE/catalyst ratio of 4. Furthermore, the obtained Fe−Zr/CNTs composite exhibited a low overpotential of 267 mV for the electrocatalytic oxygen evolution reaction (OER) at 20 mA/cm 2 in 1 M KOH electrolyte solution, which was 21 mV lower than commercial RuO 2 (288 mV) and 50 mV lower than Fe−Zr (317 mV). It was deduced that the in situ growth of CNTs reduced the charge transfer resistance and improved the electron transport efficiency of the Fe−Zr/CNTs composite, leading to superior activity in the electrocatalytic OER. This work provided detailed information for the preparation of the metal/CNTs composite from plastic wastes, which contributed positively to alleviate the environment and energy crisis.

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Dimension does matter: carbon-based substances with different dimensions exhibit opposite effects on soil CO2 and CH4 production

Zhou,

Li,

Zhang

et al. 2023

Int. J. Environ. Sci. Technol.

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Waste plastic thermal-transformed CNT@Fe–Mo/MgO for free radical activation and bacteria sterilization

Cited by 10 publications

References 44 publications

Fe–Co Bimetallic Catalysts for Pyrolysis of Disposable Face Masks and Nitrile Gloves: Synthesis and Characterization of N-Doped Carbon Nanotubes

Fe–Co Bimetallic Catalysts for Pyrolysis of Disposable Face Masks and Nitrile Gloves: Synthesis and Characterization of N-Doped Carbon Nanotubes

Fabrication of Fe–Zr, Co–Zr, and Ni–Zr Catalysts to Boost CNTs Synthesis from Plastic Wastes and the Electrocatalytic Oxygen Evolution Reaction

Dimension does matter: carbon-based substances with different dimensions exhibit opposite effects on soil CO2 and CH4 production

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