Synthesis of TiO2 Nanoparticle and its Application to Graphite Composite Electrode for Hydroxylamine Oxidation

Document Type : Research Paper


Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran



In this work, sol-gel method was used tosynthesize titanium dioxide nanoparticles (TiO2). The TiO2nanoparticles was characterized by Scanning Electron Microscopy (SEM), x-ray diffraction (XRD) and BET technique.The TiO2 and coumarin derivative (7-(1,3-dithiolan-2-yl)-9, 10-dihydroxy-6H-benzofuro [3,2-c] chromen-6-on) were incorporated in a graphite composite electrode. The resulting modified electrode displayed a good electrocatalytic activity for the oxidation of hydroxylamine, which leads to a reduction in its overpotential by more than 520 mV. Differential pulse voltammetry (DPV) of hydroxylamine at the modified electrode exhibited a linear dynamic range (between 0.5 and 500.0 µM) with a detection limit (3σ) of 0.133 μM. The high sensitivity, ease of fabrication and low cost of this modified electrode for the detection of hydroxylamine demonstrate its potential sensing applications.


[1] F. Mirkhalaf, J. Paprotny, DJ. Schiffrin, J. American Chem. Soc. 128 (2006) 7400.
[2] M. Mazloum-Ardakani, A. Khoshroo, Anal. Chim.Acta.798 (2013) 25.
[3] A. Lando, K. Lauwaet, P. Lievens, Phy. Chem. Chem. Phys. 11 (2009) 1521.
[4] G. Lai, H. Zhang, D. Han Anal. Lett.41 (2008) 3088.
[5] M. Mazloum-Ardakani, A. Khoshroo, Electrochimica. Acta.103 (2013) 77.
[6] M. Mazloum-Ardakani, Z. Taleat, A. Khoshroo, H. Beitollahi, H. Dehghani, Biosens. Bioelectron.35 (2012) 75.
[7] M. Mazloum-Ardakani, Z. Taleat, H. Beitollahi, J. Electroana. Chem. 624 (2008) 73.
[8] M. Mazloum-Ardakani, H. Kholghi, M.A. Sheikh-Mohseni, A. Benvidi, H. Naeimi, J. NanoStructure. 2 (2012) 145.
[9] D. J. Arp, L.Y. Stein, Crit. Rev. Biochem. Mol. Biol. 38 (2003) 471.
[10] M. S. M. Jetten, Plant. Soil. 230 (2001) 9-19
[11] H. W. Bange, M. O. Andreae, Global Biogeochem. Cycle.13 (1999) 1127.
[12] S. A. Montzka, P. J. Fraser, J. H. Butler, P. S. Connell and et. al. Controlled substances and other source Gases, in Scientific assessment of ozone depletion:, Global ozone research and monitoring project-report, World Meteorological Organization (WMO), Geneva,no. 47, 2002. pp. 1.1–1.83.
[13] M. Mazloum-Ardakani, A. Khoshroo, D. Nematollahi, B.-F.Mirjalili, J. Electrochem. Soc. 159 (2012) H912.
[14] T. Sugimoto, X. Zhou, A. Muramatsu, J. Colloid Interface Sci. 259 (2003) 43.
[15] M. MalekshahiByranvand, A. NematiKharat, L. Fatholahi, Z. MalekshahiBeiranvand, J. NanoStructure. 3 (2013) 1.
[16] A. J. Bard, L.R. Faulkner, Electrochemical Methods: Fundamentals and Applications, 2nd ed., Wiley, 2000.