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This BES study Abstract Acidic treated multiwalled carbon nanotubes (AMWNTs) were ground with water‐miscible room temperature ionic liquids, 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([bmim]BF 4 ), and resulted in AMWNTs‐[bmim]BF 4 composite. Its electrical‐ionic conductivity and optical properties were compared with the other two types of carbon materials‐[bmim]BF 4 composites: pyrolytic graphite powder (PGP), pristine multiwalled carbon nanotubes (PMWNTs), through the ac impedance technology and Raman spectroscopy.

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Abstract

Abstract Acidic treated multiwalled carbon nanotubes (AMWNTs) were ground with water‐miscible room temperature ionic liquids, 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([bmim]BF 4 ), and resulted in AMWNTs‐[bmim]BF 4 composite. Its electrical‐ionic conductivity and optical properties were compared with the other two types of carbon materials‐[bmim]BF 4 composites: pyrolytic graphite powder (PGP), pristine multiwalled carbon nanotubes (PMWNTs), through the ac impedance technology and Raman spectroscopy. The impedance data show that AMWNTs‐[bmim]BF 4 composite exhibits the highest conductivity. Raman spectra study exhibits that the [bmim]BF 4 can form gel with PMWNTs and AMWNTs but only form a viscous liquid with PGP. AMWNTs‐[bmim]BF 4 gel modified GC electrode was applied in direct electrochemistry of heme proteins (Hb and HRP) and it catalysis to the reduction of H 2 O 2 was investigated.

Keywords

Ionic liquidPyrolytic carbonRaman spectroscopyTetrafluoroborateDielectric spectroscopyCarbon nanotube

Identifiers

DOI
10.1002/elan.200603560
Journal
Electroanalysis
Year
2006