Synthesis of Co 3O 4 thin films by chemical bath deposition in the presence of different anions and application to H 2O 2 sensing

Chung-Wei Kung, Chia-Yu Lin, Ta Jen Li, R. Vittal, Kuo Chuan Ho

研究成果: Conference article

9 引文 (Scopus)

摘要

Co 3O 4 modified electrode was prepared by directly growing layered cobalt carbonate hydroxide (LCCH) on a conducting fluorine-doped tin oxide (FTO) substrate using a simple chemical bath deposition (CBD) technique and then by transforming the LCCH into Co 3O 4 through pyrolysis. Cobalt sources with various anions, including cobalt chloride, cobalt nitrate, cobalt acetate, and cobalt sulfate, were used in the bath solutions of CBD to prepare the LCCH thin films with various morphologies. The composition and grain size of these films were verified by X-ray diffraction (XRD); their morphologies were examined by scanning electron microscopic (SEM) and transmission electron microscopic (TEM) images. Observed from the SEM images, the Co 3O 4 films synthesized from cobalt chloride (C-Co 3O 4), cobalt nitrate (N-Co 3O 4), cobalt acetate (A-Co 3O 4), and cobalt sulfate (S-Co 3O 4) were composed of straight acicular nanorods, bending acicular nanorods, nanosheets, and net-shaped nanosheets, respectively. The four kinds of modified electrodes were applied to detect H 2O 2, and the C-Co 3O 4 modified electrode showed the best electrocatalytic activity toward H 2O 2. The pertinent sensor could be successfully used for the quantification of H 2O 2 by amperometric method. The sensing performance parameters include a linear range up to 2.0 mM, a sensitivity of 66.29 μA/cm 2-mM, a remarkable low detection limit of 0.36 μM, and a low applied potential of 0.50 V vs. Ag/AgCl/sat'd KCl.

原文English
頁(從 - 到)847-850
頁數4
期刊Procedia Engineering
25
DOIs
出版狀態Published - 2011 十二月 1
事件25th Eurosensors Conference - Athens, Greece
持續時間: 2011 九月 42011 九月 7

指紋

Cobalt
Negative ions
Thin films
Carbonates
Nanosheets
Nanorods
Electrodes
Electrons
Nitrates
Scanning
Tin oxides
Fluorine
Pyrolysis
X ray diffraction
Sensors
Substrates

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此文

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title = "Synthesis of Co 3O 4 thin films by chemical bath deposition in the presence of different anions and application to H 2O 2 sensing",
abstract = "Co 3O 4 modified electrode was prepared by directly growing layered cobalt carbonate hydroxide (LCCH) on a conducting fluorine-doped tin oxide (FTO) substrate using a simple chemical bath deposition (CBD) technique and then by transforming the LCCH into Co 3O 4 through pyrolysis. Cobalt sources with various anions, including cobalt chloride, cobalt nitrate, cobalt acetate, and cobalt sulfate, were used in the bath solutions of CBD to prepare the LCCH thin films with various morphologies. The composition and grain size of these films were verified by X-ray diffraction (XRD); their morphologies were examined by scanning electron microscopic (SEM) and transmission electron microscopic (TEM) images. Observed from the SEM images, the Co 3O 4 films synthesized from cobalt chloride (C-Co 3O 4), cobalt nitrate (N-Co 3O 4), cobalt acetate (A-Co 3O 4), and cobalt sulfate (S-Co 3O 4) were composed of straight acicular nanorods, bending acicular nanorods, nanosheets, and net-shaped nanosheets, respectively. The four kinds of modified electrodes were applied to detect H 2O 2, and the C-Co 3O 4 modified electrode showed the best electrocatalytic activity toward H 2O 2. The pertinent sensor could be successfully used for the quantification of H 2O 2 by amperometric method. The sensing performance parameters include a linear range up to 2.0 mM, a sensitivity of 66.29 μA/cm 2-mM, a remarkable low detection limit of 0.36 μM, and a low applied potential of 0.50 V vs. Ag/AgCl/sat'd KCl.",
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T1 - Synthesis of Co 3O 4 thin films by chemical bath deposition in the presence of different anions and application to H 2O 2 sensing

AU - Kung, Chung-Wei

AU - Lin, Chia-Yu

AU - Li, Ta Jen

AU - Vittal, R.

AU - Ho, Kuo Chuan

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Co 3O 4 modified electrode was prepared by directly growing layered cobalt carbonate hydroxide (LCCH) on a conducting fluorine-doped tin oxide (FTO) substrate using a simple chemical bath deposition (CBD) technique and then by transforming the LCCH into Co 3O 4 through pyrolysis. Cobalt sources with various anions, including cobalt chloride, cobalt nitrate, cobalt acetate, and cobalt sulfate, were used in the bath solutions of CBD to prepare the LCCH thin films with various morphologies. The composition and grain size of these films were verified by X-ray diffraction (XRD); their morphologies were examined by scanning electron microscopic (SEM) and transmission electron microscopic (TEM) images. Observed from the SEM images, the Co 3O 4 films synthesized from cobalt chloride (C-Co 3O 4), cobalt nitrate (N-Co 3O 4), cobalt acetate (A-Co 3O 4), and cobalt sulfate (S-Co 3O 4) were composed of straight acicular nanorods, bending acicular nanorods, nanosheets, and net-shaped nanosheets, respectively. The four kinds of modified electrodes were applied to detect H 2O 2, and the C-Co 3O 4 modified electrode showed the best electrocatalytic activity toward H 2O 2. The pertinent sensor could be successfully used for the quantification of H 2O 2 by amperometric method. The sensing performance parameters include a linear range up to 2.0 mM, a sensitivity of 66.29 μA/cm 2-mM, a remarkable low detection limit of 0.36 μM, and a low applied potential of 0.50 V vs. Ag/AgCl/sat'd KCl.

AB - Co 3O 4 modified electrode was prepared by directly growing layered cobalt carbonate hydroxide (LCCH) on a conducting fluorine-doped tin oxide (FTO) substrate using a simple chemical bath deposition (CBD) technique and then by transforming the LCCH into Co 3O 4 through pyrolysis. Cobalt sources with various anions, including cobalt chloride, cobalt nitrate, cobalt acetate, and cobalt sulfate, were used in the bath solutions of CBD to prepare the LCCH thin films with various morphologies. The composition and grain size of these films were verified by X-ray diffraction (XRD); their morphologies were examined by scanning electron microscopic (SEM) and transmission electron microscopic (TEM) images. Observed from the SEM images, the Co 3O 4 films synthesized from cobalt chloride (C-Co 3O 4), cobalt nitrate (N-Co 3O 4), cobalt acetate (A-Co 3O 4), and cobalt sulfate (S-Co 3O 4) were composed of straight acicular nanorods, bending acicular nanorods, nanosheets, and net-shaped nanosheets, respectively. The four kinds of modified electrodes were applied to detect H 2O 2, and the C-Co 3O 4 modified electrode showed the best electrocatalytic activity toward H 2O 2. The pertinent sensor could be successfully used for the quantification of H 2O 2 by amperometric method. The sensing performance parameters include a linear range up to 2.0 mM, a sensitivity of 66.29 μA/cm 2-mM, a remarkable low detection limit of 0.36 μM, and a low applied potential of 0.50 V vs. Ag/AgCl/sat'd KCl.

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