Aerosol‐Assisted Chemical Vapor Deposition of Multi‐Walled Carbon Nanotubes on Steel Substrates for Application in Supercapacitors

Abstract

Carbon nanotubes (CNTs) are grown on to steel substrates by aerosol-assisted chemical vapor deposition using ferrocene in ethanol as the carbon feedstock. The CNTs adopted a highly entangled morphology. Elemental analysis indicates that the main source of carbon for CNT growth is from the cyclopentadiene rings in ferrocene rather than the ethanol solvent. The CNT-coated steel substrates are evaluated for their performance as supercapacitor electrodes. The electrodes exhibit a high geometric capacitance of 3.4 mF cm À2 which is due to the high internal surface area, but a relatively low specific capacitance of 0.34 F g À1 .

Fabrication of Nanostructured Pd Thin Films Using Aerosol-Assisted Chemical Vapor Deposition for the Nonenzymatic Electrochemical Detection of H2O2

“…The design and infrastructure of AACVD are well-known. 41 A total of 80 mg (0.356 mM) of the precursor palladium(II) acetate, Pd(OAc) 2 , was suspended in methanol (12 mL) and became clear upon the addition of 0.1 mL of trifluoroacetic acid (CF 3 COOH). Afterward, the resultant yellow solution was utilized in AACVD to observe the growth of Pd films.…”

“…AACVD was used to grow the palladium thin film electrodes. The design and infrastructure of AACVD are well-known . A total of 80 mg (0.356 mM) of the precursor palladium­(II) acetate, Pd­(OAc) 2 , was suspended in methanol (12 mL) and became clear upon the addition of 0.1 mL of trifluoro­acetic acid (CF 3 COOH).…”

Growth of carbon nanotubes from waste blast furnace gases at atmospheric pressure

“…A recent study has shown that steel can act as the catalyst for CNT growth, as it contains elements such as Fe, Co, Ni etc, which are all known to catalyse CNT growth . The ability to grow CNTs on the steel surface eliminates the need of purposely designed expensive catalysts and simplifies the CNT growth significantly compared to the methods reported previously . In terms of low‐cost CNT production at manufacturing scale, this is a key finding as steel is widely available at low‐cost and is robust and stable.…”

“…Carbon nanotubes (CNTs) have recently been used in many diverse applications such as sensors, ceramics, filters and membranes, catalysis and energy storage devices,. If the CO 2 and CO from the waste blast furnace gases could be utilized as the carbon source for CNT growth, it will be an economically viable process and a sustainable technology.…”

“…recently . From the end user view point, growth of CNTs directly on to steel substrates is very attractive as they have direct applications as electrodes in Li‐ion batteries, supercapacitors and bipolar plates in fuel cells,. It was found that the CNTs have only grown at the front end of the steel substrate where the density is just high enough to provide a sufficient collision frequency of the carbon source molecules with the steel substrate.…”