title: A facile one-pot method to synthesize a three-dimensional graphene@carbon nanotube composite as a high-efficiency microwave absorber.
abstract: A novel three-dimensional graphene@carbon nanotube (CNTs) composite has been prepared using a facile one-pot pyrolysis strategy using urea as the carbon source, in which the density and length of CNTs on graphene are rationally tuned by adding an appropriate amount of urea to a precursor mixture. Correspondingly, the density and length of CNTs on graphene have a significant effect on the microwave absorption properties of graphene@CNTs. When most of the graphene surface is clearly covered by the CNTs whose length ranges from 300 to 600 nm, the graphene@CNT composite exhibits excellent microwave absorption properties. The maximum reflection loss value can reach -44.6 dB at 8.6 GHz and the absorption bandwidth with a reflection loss below -10 dB ranges from 7.1 to 10.4 GHz with an addition amount of only 5 wt% graphene@CNTs composite in the paraffin matrix.
authors.affiliation: Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, P. R. China. wangleiorganic@126.com yingh@nwpu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Huang
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Junjiao
authors.initials: J
authors.lastname: Chen
authors.forename: Xu
authors.initials: X
authors.lastname: Sun
mesh_terms: D002244:Carbon; D060326:Chemistry Techniques, Synthetic; D006108:Graphite / Q000138:chemical synthesis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008872:Microwaves; D037742:Nanotubes, Carbon / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; C009139:pyrolytic carbon; D002244:Carbon; D006108:Graphite