Optimization of Synthesis Conditions of Carbon Nanotubes via Ultrasonic-Assisted Floating Catalyst Deposition Using Response Surface Methodology

The growing use of carbon nanotubes (CNTs) in a plethora of applications has provided to us a motivation to investigate CNT synthesis by new methods. In this study, ultrasonic-assisted chemical vapor deposition (CVD) method was employed to synthesize CNTs. The difficulty of controlling the size of c...

Full description

Saved in:
Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2018-05, Vol.8 (5), p.316
Main Authors: Mohammadian, Narges, Ghoreishi, Seyyed M, Hafeziyeh, Samira, Saeidi, Samrand, Dionysiou, Dionysios D
Format: Article
Language:English
Subjects:
Carbon nanotubes
Catalysis
Catalysts
Chemical synthesis
Chemical vapor deposition
Design optimization
floating catalyst deposition
Flow rates
Flow velocity
Immunoglobulins
Motivation
Nanotechnology
Nanotubes
Organic chemistry
Raman spectroscopy
Response surface methodology
Rotation
Ultrasonic testing
Xylene
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The growing use of carbon nanotubes (CNTs) in a plethora of applications has provided to us a motivation to investigate CNT synthesis by new methods. In this study, ultrasonic-assisted chemical vapor deposition (CVD) method was employed to synthesize CNTs. The difficulty of controlling the size of clusters and achieving uniform distribution-the major problem in previous methods-was solved by using ultrasonic bath and dissolving ferrocene in xylene outside the reactor. The operating conditions were optimized using a rotatable central composite design (CCD), which helped optimize the operating conditions of the method. Response surface methodology (RSM) was used to analyze these experiments. Using statistical software was very effective, considering that it decreased the number of experiments needed to achieve the optimum conditions. Synthesis of CNTs was studied as a function of three independent parameters viz. hydrogen flow rate (120⁻280 cm³/min), catalyst concentration (2⁻6 wt %), and synthesis temperature (800⁻1200 °C). Optimum conditions for the synthesis of CNTs were found to be 3.78 wt %, 184 cm³/min, and 976 °C for catalyst concentration, hydrogen flow rate, and synthesis temperature, respectively. Under these conditions, Raman spectrum indicates high values of ( / ), which means high-quality CNTs.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano8050316