Multifunctional Hybrid Materials Based on Carbon Nanotube Chemically Bonded to Reduced Graphene Oxide

作者：Kotal Moumita; Bhowmick Anil K^*

来源：Journal of Physical Chemistry C, 2013, 117(48): 25865-25875.

DOI：10.1021/jp4097265

A novel chemical approach is explored to design three-dimensional porous network of reduced graphene oxide (GO)/multiwalled carbon nanotube (MWCNT) hybrid from reduced GO connected to MWCNT by sp(2) carbons. The process involved simultaneous functionalization, reduction, and stitching of GO by p-phenylenediamine and subsequent diazotization followed by C-C coupling with MWCNT. For comparison, a physical mixture was also prepared. The resulting hybrids were characterized by infrared, Raman, UV-vis, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and scanning tunneling microscopy. The chemical hybrid was shown to exhibit good electrical conductivity (210.48 S m(-1)), promising specific capacitance (277 F g(-1)) even at high current density (10 A g(-1)), remarkable energy density (21.32 W h kg(-1)) especially at high power density (3.13 kW kg(-1)), outstanding cyclability (89%) even after 2000 cycles, and good dye adsorption capacity (245 mg g(-1)) for crystal violet owing to its extended conjugated network, larger surface area, and porous structure. Therefore, the hybrid is attractive for supercapacitors, dye removal, and other electronic applications.

• 出版日期2013-12-5