A green and high-yield route to recycle waste masks into CNTs/Ni hybrids via catalytic carbonization and their application for superior microwave absorption

Degradation of plastics associated with the COVID-19 pandemic

“…On the other hand, some authors have implemented different technological strategies to mitigate the plastic pollution generated by PPE waste (in particular, face masks), such as employing a Ni(OH) 2 /NiCl 2 hybrid catalyst to catalytic carbonization of face mask waste ( R. Yu et al, 2021 ) or through a method co-hydrothermal liquefaction (Co-HTL) with Spirulina platensis grown in wastewater ( L. Li et al, 2021 ). Other authors have developed antiviral/antibacterial biodegradable cellulose textiles for manufacturing face masks with the aim of making woven environmentally friendly and bioprotective materials with the potential to minimize MPs pollution ( Deng et al, 2022 ).…”

Face masks and respirators: Towards sustainable materials and technologies to overcome the shortcomings and challenges

“…The prepared hybrid from this scalable and low-cost strategy has shown superior microwave absorption performance due to the synergistic impacts of carbon nanotube and nickel. [182] MAR waste has the potential to be used in electrochemical applications and generating energy storage systems. Zhu et al synthesized novel carbon-based electrode materials (anodes and cathodes) from discarded MAR.…”

Oxygen-vacancy-rich Fe3O4/carbon nanosheets enabling high-attenuation and broadband microwave absorption through the integration of interfacial polarization and charge-separation polarization

“…[6][7][8] To achieve excellent microwave absorption performance, heterostructure engineering could endow MAMs with abundant interfaces and defects, which will enhance interfacial/defectinduced polarizations and satisfy impedance matching. [9][10][11][12] Hybrid nanostructured materials are a class of materials composed of at least two components, with at least one component having a nanoscale dimension, for example, twodimensional (2D) nanostructures with large lateral dimensions, 13,14 yolk-shell structures with unique inner cavities, 15 porous nanospheres with rich pore structures, 16 etc. When served for microwave absorption, hybrid nanostructured materials could facilitate the attenuation of EM waves through enhancing the polarization at large interfaces and multiple scattering between the hetero-interfaces.…”