scholarly journals Effects of O2 plasma and UV-O3 assisted surface activation on high sensitivity metal oxide functionalized multiwalled carbon nanotube CH4 sensors

2017 ◽  
Vol 35 (6) ◽  
pp. 061402
Author(s):  
Md Tanim Humayun ◽  
Michela Sainato ◽  
Ralu Divan ◽  
Richard A. Rosenberg ◽  
Alvaro Sahagun ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Metal Oxide ◽  
High Sensitivity ◽  
Multiwalled Carbon Nanotube ◽  
Surface Activation ◽  
Multiwalled Carbon ◽  
O2 Plasma

Reduced Graphene Oxide/Multiwalled Carbon Nanotube Composite Decorated with Fe3O4 Magnetic Nanoparticles for Electrochemical Determination of Hydrazine in Environmental Water

2020 ◽  
Vol 20 (5) ◽  
pp. 3148-3156 ◽  
Author(s):  
S. Nehru ◽  
Subramanian Sakthinathan ◽  
P. Tamizhdurai ◽  
Te-Wei Chiu ◽  
K. Shanthi
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Magnetic Nanoparticles ◽  
Reduced Graphene Oxide ◽  
Electrochemical Impedance ◽  
Limit Of Detection ◽  
High Sensitivity ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Reduced Graphene

In the present work, a reduced graphene oxide and multiwalled carbon nanotube (RGO/MWCNTFe3O4) composite decorated with Fe3O4 magnetic nanoparticles was prepared as an electrochemical sensor. The surface morphology of the prepared composite was identified by scanning electron microscopy and X-ray diffraction. The electrochemical properties of the GCE/RGO/MWCNT-Fe3O4 electrode were investigated by electrochemical impedance spectroscopy, cyclic voltammetry and amperometry. The GCE/RGO/MWCNT-Fe3O4 electrode exhibited higher electrocatalytic performance towards the oxidation of hydrazine. In the optimal conditions, the GCE/RGO/MWCNT-Fe3O4 electrode showed a wide linear range (0.15–220 μM), low limit of detection (LOD) (0.75 μM), and high sensitivity (2.868 μA μM−1 cm−2). The prepared GCE/RGO/MWCNT-Fe3O4 electrode also had excellent repeatability, selectivity, and reproducibility. The practical application of the electrode was confirmed with various spiked water samples and demonstrated acceptable recovery.

scholarly journals Synthesis of Metal Oxide Decorated Polycarboxyphenyl Polymer-Grafted Multiwalled Carbon Nanotube Composites by a Chemical Grafting Approach for Supercapacitor Application

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Do-Yeon Kang ◽  
Pashupati Pokharel ◽  
Yeong-Seok Kim ◽  
Sunwoong Choi ◽  
Seong-Ho Choi
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotube ◽  
Metal Oxide ◽  
Specific Capacitance ◽  
Metal Oxide Nanoparticles ◽  
Morphological Characteristics ◽  
Multiwalled Carbon Nanotube ◽  
Oxide Nanoparticles ◽  
Multiwalled Carbon ◽  
Scan Rate

We present grafting of polycarboxyphenyl polymer on the surface of multiwalled carbon nanotube (MWCNT) via a free radical polymerization and subsequent anchoring of the metal oxide nanoparticles for the evaluation of their potential applicability to supercapacitor electrodes. Here, metal oxide nanoparticles, Fe3O4and Sm2O3, were created after the oxidation of metal precursors Sm(NO3)3and FeCl2, respectively, and attached on the surface of polycarboxyphenyl-grafted MWCNT (P-CNT) in aqueous medium. This approach shows a potential for enhancing the dispersion of Fe3O4and Sm2O3nanoparticles on the wall of P-CNT. The structure and morphological characteristics of the purified MWCNT, P-CNT, and metal oxide-anchored polycarboxyphenyl-grafted MWCNT (MP-CNT) nanocomposites were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The electrochemical performance of the purified MWCNT electrode, P-CNT electrode, and MP-CNT electrodes was tested by cyclic voltammetry (CV) and galvanostatic charge discharge in a 1.0 M H2SO4aqueous electrolyte. The results showed that the specific capacitance of the purified MWCNT was 45.3 F/g at the scan rate of 5 mV/s and increased to 54.1 F/g after the modification with polycarboxyphenyl polymer. Further modification of P-CNT with Sm2O3and Fe3O4improved the specific capacitance of 65.84 F/g and 173.38 F/g, respectively, at the same scan rate.

Electrochemical non-enzymatic glucose sensors based on nano-composite of Co3O4 and multiwalled carbon nanotube

2019 ◽  
Vol 30 (6) ◽  
pp. 1157-1160 ◽  
Author(s):  
Xiaoyun Lin ◽  
Yanfang Wang ◽  
Miaomiao Zou ◽  
Tianxiang Lan ◽  
Yongnian Ni
Keyword(s):  
Carbon Nanotube ◽  
Glucose Sensors ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Nano Composite

Cobalt-polypyrrole-multiwalled carbon nanotube catalysts for hydrogen and alcohol fuel cells

Carbon ◽  
2008 ◽  
Vol 46 (1) ◽  
pp. 2-11 ◽  
Author(s):  
Arava Leela Mohana Reddy ◽  
Natarajan Rajalakshmi ◽  
Sundara Ramaprabhu
Keyword(s):  
Fuel Cells ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Alcohol Fuel
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