Fabrication of multi-walled carbon nanotube thin films via electrophoretic deposition process: effect of water magnetization on deposition efficiency

Abstract

In this study, the effect of water magnetization was investigated on the performance of electrophoretic deposition (EPD) of multi-walled carbon nanotubes (MWCNTs). Magnetization of water was carried out via two different methods including static and dynamic magnetization processes. It has been found that magnetization of water, as the EPD medium, could enhance several characteristics of MWCNT thin films (MWCNT-TFs). Application of magnetized water as solvent in EPD process resulted in higher electrical conductivity of EPD suspension; consequently, required deposition time was reduced and the electrolysis of water, which is known as one of the main disadvantages of water-based EPDs, was controlled to some extent. Surface morphology of MWCNT-TFs was studied via scanning electron microscopy, and notable enhancement was detected in uniformity and density of MWCNT-TF network. Significant improvement was achieved in electrical conductivity (up to 54 % increase in current) of MWCNT-TF by measuring the current versus voltage characteristics of MWCNT-TFs.

Fischer–Tropsch Synthesis over Cobalt/CNTs Catalysts: Functionalized Support and Catalyst Preparation Effect on Activity and Kinetic Parameters

“…In addition, the peak at 1730 cm –1 is assigned to the CO– stretching vibration within the COOH group . Furthermore, the peaks around 1410 and 3215 cm –1 match to bending and stretching vibrations of the O–H bond, respectively . The evidence of anchoring the carboxylic groups through acid treatment on the FCNTs surface were disclosed via these new hydroxyl groups.…”

“…44 Furthermore, the peaks around 1410 and 3215 cm −1 match to bending and stretching vibrations of the O−H bond, respectively. 54 The evidence of anchoring the carboxylic groups through acid treatment on the FCNTs surface were disclosed via these new hydroxyl groups. The C−H symmetric and antisymmetric stretch for CH 3 and CH 2 was observed at peaks 2850−2950 and 597 cm −1 (Figure 1).…”