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

Research output: Contribution to journalConference article

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)847-850
Number of pages4
JournalProcedia Engineering
Volume25
DOIs
Publication statusPublished - 2011 Dec 1
Event25th Eurosensors Conference - Athens, Greece
Duration: 2011 Sep 42011 Sep 7

Fingerprint

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)

Cite this

@article{a0b2fbe5dc65438691117e9bd4d84d0f,
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.",
author = "Chung-Wei Kung and Chia-Yu Lin and Li, {Ta Jen} and R. Vittal and Ho, {Kuo Chuan}",
year = "2011",
month = "12",
day = "1",
doi = "10.1016/j.proeng.2011.12.208",
language = "English",
volume = "25",
pages = "847--850",
journal = "Procedia Engineering",
issn = "1877-7058",
publisher = "Elsevier BV",

}

Synthesis of Co 3O 4 thin films by chemical bath deposition in the presence of different anions and application to H 2O 2 sensing. / Kung, Chung-Wei; Lin, Chia-Yu; Li, Ta Jen; Vittal, R.; Ho, Kuo Chuan.

In: Procedia Engineering, Vol. 25, 01.12.2011, p. 847-850.

Research output: Contribution to journalConference article

TY - JOUR

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.

UR - http://www.scopus.com/inward/record.url?scp=84863130375&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863130375&partnerID=8YFLogxK

U2 - 10.1016/j.proeng.2011.12.208

DO - 10.1016/j.proeng.2011.12.208

M3 - Conference article

AN - SCOPUS:84863130375

VL - 25

SP - 847

EP - 850

JO - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

ER -