1. Jirapat Pakchamsai1, Cheewapon Chookiat1, Konrat Kerdnawee2,
Thantorn Vanavanichkul2, Jirarat Kaewngam2, Weerawut Chaiwat3, Hajime Tamon4, Noriaki Sano4 and Tawatchai Charinpanitkul2
1 International School of Engineering, Faculty of Engineering, Chulalongkorn University Bangkok, THAILAND
2 Center of Excellence in Particle Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, THAILAND
3 Environmental Engineering and Disaster Management Program, Mahidol University, Kanchanaburi Campus, Sai Yok 71150, Kanchanaburi, Thailand
4 Separation Engineering Laboratory, Department of Chemical Engineering,
Faculty of Engineering, Kyoto University, Kyoto, JAPAN
EFFECT OF CO-EXISTENCE OF Au AND Fe
NANOPARTICLES IN METAL-SWCNH COMPOSITE
SYNTHESIZED BY ARC-DISCHARGE IN WATER METHOD
Introduction
Among those nanomaterials, single-walled carbon nanohorns (SWCNHs) are a
member of carbon nanomaterials which possess unique structures which again
motivate scientists and researchers to conduct many challenging investigations [1].
SWCNHs have surface area and chemical stability superior to other carbon
nanostructures. In addition, several promising applications could be expected when
SWCNHs are combined with some metal nanoparticles [2]. There are many
approaches proposed by various research teams to produce SWCNHs. For
instance, gas-injected arc-in-water method (GI-AIW) is a simple method which can
produce SWCNHs with high purity [1,3]. So far, some previous works have focused
on experiments of SWCNH synthesis with effect of various metals which could be
simply hybridized with SWCNHs [4]. Sano et al. reports that incorporation of gold
nanoparticles would exert significant effect on particle size distribution of Au-
SWCNH hybridized composite when compared with previous investigation on
hybridization of SWCNHs with Fe [2,5]. However, combined effect of co-existence
of Fe and Au within SWCNHs has not been clearly investigated. Therefore, this
work sets its aim on examining effect of Au and Fe nanoparticles which co-existed
in metal-SWCNH composites synthesized by arc-discharge in water method.
Acknowledgements
This work is supported by the Centennial fund of Chulalongkorn University
to Center of Excellence in Particle Technology (CEPT).
Preliminary Results
References
[1] Noriaki,S., J. Phys D: Appl. Phys, 37 (8), 17-20 (2014)
[2] Noriaki, S. et al., Ind. Eng. Chem. Res, 53, 4732-4738 (2014)
[3] Chantamanee, P. et al., Green. Chem. Adv. Article, 18 (2014)
[4] Noriaki, S., Yuu, K., Tatsuhiro, S., J. Mater. Chem, 18, 1555-1560 (2008)
[5] Chantamanee, P. et al., Carbon, 49 (14), 4920 – 4927 (2011)
[6] Andrault, D. et al., Phys. Earth Planet. Inter., 174, 181–191(2009)
[7] Young, R. (1995). The Rietveld Method. Oxford: Oxford Science Publication
Experimental
Future Works
TEM images of pristine Fe-CNHs, (b) TEM images of Au-Fe-CNHs using 0.3 mm Fe wire, (c)
TEM images of Au-Fe-CNHs using 0.5 mm Fe wire, and (d) TEM images of Au-Fe-CNHs using
0.8 mm Fe wire
Further investigation on the performance of such metal-SWCNH
hybridized material on removal of antibiotic pollutants would be
conducted and reported in the future.
IT COULD BE OBSERVED THAT PHYSICAL AND ATOMIC PROPERTIES OF METAL-SWCNH HYBRIDIZED MATERIAL COULD BE
AFFECTED BY INITIAL LOADING OF FE AND AU WIRES INSERTED INTO GRAPHITIC ANODE. IMAGE ANALYSIS OF TEM
MICROGRAPHS REVEALS THAT NOMINAL SIZE OF FE NANOPARTICLES EMBEDDED IN SWCNHS BECOME SMALLER WHEN AU
WAS INTRODUCED. MEANWHILE THE ATOMIC RATIO OF AU IN METAL ALLOY EMBEDDED IN SWCNHS BECAME HIGHER
WITH AN INCREASE IN THE WEIGHT RATIO OF AU TO FE.• Synthesis by gas-injected arc-in-water method
•Summary of experimental condition
XRD patterns of pristine CNH, Fe-powder, Au-powder, and Au-Fe-SWCNHs with various
size of Fe wire of 0.3, 0.5, 0.6, and 0.8 mm.
Single-Walled Carbon
NanoHorns (SWCNHs)
Ref : N. Sano et al.
Distilled Water 3000mL
Graphite Rod (Anode) Diameter(Ø) 6.15mm, Length(L)
76mm (with 2mm Ø hole)
Graphite Rod (Cathode) Diameter(Ø) 20mm, Length(L) 55mm
(with upper four 2mm Ø holes and
lower 10mm Ø hole)
Power Supply Discharge Current 100A
Velocity of Lower Electrode 1.5mm/s
Distance of Lower Electrode 67mm
Time of Reaction 30s
Nitrogen Gas Flow Rate 10L/min
Voltage 30volt
(a)
50 nm
50 nm
(d)
50 nm
(c)
50 nm
(b)
Dependence of average size of Fe
nanoparticles on diameter of iron wire
Effect of weight ratio of Au wire on
average particle size