Multiwalled Carbon Nanotubes Decorated with Cobalt Oxide Nanoparticles

Abstract

Multiwalled carbon nanotubes (MWCNTs) synthesized by spray pyrolysis were decorated with cobalt oxide nanoparticles using a simple synthesis route. This wet chemistry method yielded nanoparticles randomly anchored to the surface of the nanotubes by decomposition of cobalt nitrate hexahydrate diluted in acetone. Electron microscopy analysis indicated that dispersed particles were formed on the MWCNTs walls. The average size increased with the increasing concentration of cobalt nitrate in acetone in the precursor mixture. TEM images indicated that nanoparticles were strongly attached to the tube walls. The Raman spectroscopy results suggested that the MWCNT structure was slightly damaged after the nanoparticle growth.

Synthesis and Characterization of Silver Nanoparticle‐Multiwalled Carbon Nanotube Composites

“…During the last decades, extensive research has led to the development of versatile methods for modifying carbon nanotubes (CNTs) and to obtain derivatives with more attractive features [1][2][3][4][5][6][7][8]. To this end, CNTs decorated with metal nanoparticles (NPs), which exhibit outstanding chemical activity due to their large active surface area and crystallographic surface structure, have been examined for potentials applications in nanoelectronics and heterogeneous catalysis as well as chemical and biochemical sensors [9][10][11][12][13][14][15].…”

Hydrogen generation from LiBH 4 solution catalyzed by multiwalled carbon nanotubes supported Co–B nanocatalysts for a portable micro proton exchange membrane fuel cell application

“…In CoeB/f-CNTs, the peak positions of the CNTs are not changed, suggesting that the lattice structure of the CNTs were not affected in the presence of CoeB. But the peak intensity of the carboxyl group of f-CNTs decreased and a new peak at 678 cm À1 , corresponding to the Co 2þ bonds [35] arised. These observations suggest that CNTs were well functionalized and the CoeB catalysts were attached to the surface of f-CNTs through the weak interaction with the carboxyl groups of f-CNTs.…”

A sensitive nonenzymatic hydrogen peroxide sensor using cadmium oxide nanoparticles/multiwall carbon nanotube modified glassy carbon electrode

“…In this work, CdO shows better sensitivity than other metal oxide ( Table 1). The linear range of the CdO-MWCNT modified electrode is also comparable with electrodes modified with metal or metal oxide nanoparticles [10][11][12][13][14][15][16][17][18][19][20][21][22].…”

“…Nanoscale metal oxides are a very promising class of electrocatalysts because they are active, inexpensive and thermodynamically stable [9]. To date, different metal oxide particles and nanoparticles such as copper oxide [10] zirconium oxide [11], ruthenium oxide [12], cobalt oxide [13,14], iron oxide [15,16] and nickel oxide [17][18][19], manganese oxide [20], titanium oxide [21] and zinc oxide [22] have been successfully used for sensing H 2 O 2 . Nanoscale CdO with different morphologies has been synthesized [23][24][25] and this oxide is known to possess high electrical conductivity, high carrier concentration and high transparency in the visible range of the electromagnetic spectrum [26].…”