TY - JOUR
T1 - Ultrasonic assisted functionalization of MWCNT and synergistic electrocatalytic effect of nano-hydroxyapatite incorporated MWCNT-chitosan scaffolds for sensing of nitrofurantoin
AU - Velmurugan, Sethupathi
AU - Palanisamy, Selvakumar
AU - C-K Yang, Thomas
AU - Gochoo, Munkhjargal
AU - Chen, Shih Wen
N1 - Funding Information:
This project was supported by the Ministry of Science and Technology (project No: 106-2119-M-027-001 and 108-2221-E-027-072 ) of Taiwan. Dr Selvakumar Palanisamy expresses his sincere thanks to the National Taipei University of Technology of Taiwan (Republic of China) for providing the Post-Doctoral Fellowship. The Center of Precision Analysis and Material Research, National Taipei University of Technology also acknowledged by the authors for providing the all necessary Instrument facilities.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4
Y1 - 2020/4
N2 - In the present work, we report the fabrication of stable composite of chitosan hydrogels (CHI) on multiwalled carbon nanotubes (MWCNT) using a simple ultrasonic-assisted method. Also, rod-like hydroxyapatite nanoparticles (HA NPs) were synthesised using a hydrothermal route and were incorporated into the highly conductive MWCNT-CHI scaffolds using an ultrasonication method. The functionalization of MWCNT and preparation of HA NPs on MWCNT-CHI nanocomposite were done using the sonication over the frequency of 37 kHz with the ultrasonic power capable of 150 W (Elmasonic Easy 60H bath sonicator). The resulting hybrid HA NPs/MWCNT-CHI nanocomposites have an excellent surface area and high surface to volume ratio, which leads to the sensitive detection of nitrofurantoin than pristine MWCNT and HA NPs. The complete elemental and morphological analyses of the HA NPs/MWCNT-CHI nanocomposites were characterised by XRD, FTIR, RAMAN, FESEM, TEM, EDX, and elemental mapping techniques. Electrochemical analysis of the HA NPs/MWCNT-CHI nanocomposites was carried out by cyclic voltammetry, electrochemical impedance spectroscopy and amperometry methods. The modified glassy carbon electrode (GCE) of HA NPs/MWCNT-CHI nanocomposites exhibit the nitrofurantoin detection activity at the linear range of 0.005–982.1 µM with the detection limit of 1.3 nM. The synergistic electrocatalytic activity of HA NPs/MWCNT-CHI nanocomposites modified GCE is correlated to the sensitivity of 0.16 µAµM−1 cm−2 with excellent precision and accuracy towards the sensing of nitrofurantoin.
AB - In the present work, we report the fabrication of stable composite of chitosan hydrogels (CHI) on multiwalled carbon nanotubes (MWCNT) using a simple ultrasonic-assisted method. Also, rod-like hydroxyapatite nanoparticles (HA NPs) were synthesised using a hydrothermal route and were incorporated into the highly conductive MWCNT-CHI scaffolds using an ultrasonication method. The functionalization of MWCNT and preparation of HA NPs on MWCNT-CHI nanocomposite were done using the sonication over the frequency of 37 kHz with the ultrasonic power capable of 150 W (Elmasonic Easy 60H bath sonicator). The resulting hybrid HA NPs/MWCNT-CHI nanocomposites have an excellent surface area and high surface to volume ratio, which leads to the sensitive detection of nitrofurantoin than pristine MWCNT and HA NPs. The complete elemental and morphological analyses of the HA NPs/MWCNT-CHI nanocomposites were characterised by XRD, FTIR, RAMAN, FESEM, TEM, EDX, and elemental mapping techniques. Electrochemical analysis of the HA NPs/MWCNT-CHI nanocomposites was carried out by cyclic voltammetry, electrochemical impedance spectroscopy and amperometry methods. The modified glassy carbon electrode (GCE) of HA NPs/MWCNT-CHI nanocomposites exhibit the nitrofurantoin detection activity at the linear range of 0.005–982.1 µM with the detection limit of 1.3 nM. The synergistic electrocatalytic activity of HA NPs/MWCNT-CHI nanocomposites modified GCE is correlated to the sensitivity of 0.16 µAµM−1 cm−2 with excellent precision and accuracy towards the sensing of nitrofurantoin.
KW - Electrocatalyst
KW - Hydroxyapatite nanocomposite
KW - MWCNT-CHI scaffolds
KW - Nitrofurantoin sensor
KW - Ultrasonic functionalization
UR - http://www.scopus.com/inward/record.url?scp=85076216846&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85076216846&partnerID=8YFLogxK
U2 - 10.1016/j.ultsonch.2019.104863
DO - 10.1016/j.ultsonch.2019.104863
M3 - Article
C2 - 31806550
AN - SCOPUS:85076216846
SN - 1350-4177
VL - 62
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
M1 - 104863
ER -