Hierarchically porous N‐doped carbon nanofibers derived from ZIF‐8/PAN composites for benzene adsorption

Abstract

Coupling with electrospinning technique, metal–organic‐frameworks (MOFs)‐derived porous carbon fibers exhibit a great potential application in the adsorption of volatile organic compounds (VOCs) because of their huge surface area, high porosity, as well as sufficient heteroatom‐doped active sites. In this work, the hierarchically porous N‐doped carbon nanofibers are obtained after the pyrolysis of zeolite imidazole framework‐8 and polyacrylonitrile (ZIF‐8/PAN) composite fibers synthesized by electrospinning method. The N‐doped carbon nanofibers fabricated in N2 atmosphere (N‐CF‐N2) present an enhanced adsorption capacity of 694 mg/g for benzene because of the synergistic effect of the hierarchically porous structure and the abundant N‐species‐containing active sites. It is also interesting that the N‐doped hierarchical carbon nanofibers fabricated in Ar atmosphere (N‐CF‐Ar) exhibit a low benzene adsorption as compared with the N‐CF‐N2, which can be attributed to the porous structure damage caused by the bombardment of heavy Ar atoms on the pore shells during the pyrolysis. These results not only show a promising application of the as‐fabricated N‐CF‐N2 in adsorption of VOCs for air purification due to its merit of cost‐efficient, large‐scale production, and excellent adsorption capacity, but also expand the potential of electrospinning technology and composite fibers in volatile organic gas adsorption.

Stabilization of palladium nanoparticles inside chitosan derived N‐doped carbon nanofibers for Heck reaction

“…Time resolution was 190 ps at a 60 Co prompt peak of 1.18 and 1.33 MeV. A 22 Na positron source (6.0 Â 10 5 Bq) on 3 μm thick Kapton films was sandwiched between two identical samples. Analysis of positron lifetime spectrum was performed using a threecomponent fitting LT 9.0 program.…”

“…18,19 Among them, N-doped carbon supporting materials have attracted much attention for their interesting physicochemical properties. [20][21][22] The nitrogen species inside the carbon can act as anchoring sites for palladium species to improve their catalytic activity and stability. Beside doping with heteroatoms, another promising strategy to improve the stability of palladium species is to encapsulate the palladium species inside the porous carbon supports.…”

Efficient extraction based on a polydimethylsiloxane/bimetallic ZnCo-MOF carbonization sponge coupled with GC-MS for the rapid analysis of volatile compounds in cumin

“…Compared with other carbon materials, nanoporous carbon has excellent characteristics such as outstanding surface area, ultrahigh porosity, and ease of functionalization. 39–41 Bimetallic MOFs that combine two different metal ions as nodes in their molecular frameworks have recently attracted increasing attention, due to the need for the production of high-performance materials with high adsorption capacity and synergistic functionalities. 42,43 Although many reports exist on the fabrication of MOF derivatives, there are few studies on the direct carbonization of bimetallic MOFs to obtain functional materials.…”

Effect of co-electrospinning system on morphology and oil adsorption of helical nanofibers

“…reported that bicomponent fibers were used for antistatic fabric in textiles. 32 Asare et al. utilized bicomponent fibers in fire-resistant or flame-retardant textiles.…”

“…31 Yang et al reported that bicomponent fibers were used for antistatic fabric in textiles. 32 Asare et al utilized bicomponent fibers in fire-resistant or flame-retardant textiles. 33 Lee et al proposed bicomponent fibrous multilayer nonwovens as sound absorption textiles.…”