Formation of hollow carbon nanofibers on bio-char during microwave pyrolysis of palm kernel shell
作者： Joy Esohe Omoriyekomwan , Arash Tahmasebi , Jian Zhang , Jianglong Yu
DOI: 10.1016/J.ENCONMAN.2017.06.022
关键词: Raman spectroscopy 、 High-resolution transmission electron microscopy 、 Catalysis 、 Materials science 、 Nanotechnology 、 Chemical engineering 、 Carbon 、 Pyrolysis 、 Microwave 、 Transmission electron microscopy 、 Carbon nanofiber
摘要: Abstract Hollow carbon nanofibers (HCNFs) were found to have formed during microwave pyrolysis of palm kernel shell (PKS) at 500 and 600 °C. The formation HCNFs was only observed not the fixed-bed pyrolysis, indicating that played a key role in HCNFs. X-ray diffraction (XRD) analysis bio-chars showed typical diffractions 2θ = 26.3° 43.2°, good graphitic structure HCNFs, especially for prepared High resolution transmission electron microscope (HRTEM) results revealed multiwall nature with layer spacing 0.34 nm. Two major tubular bamboo-shape structures With increasing temperature from 600 °C, yield increased 5.85 wt.% 9.88 wt.%. Raman spectroscopy I D / G ratio decreased 0.95 0.86, higher order layers Energy dispersive (EDS) presence Fe, K, Ca which may catalytic their growth. Mechanism growth under irradiation proposed discussed. HCNFs-coated bio-char has great potential removal heavy metals waste water.
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