Carbon Nanotube/Gold nanoparticles Sensor for Detection of Hydrazine in the Pyrogallol Red Solution
نویسندگان
چکیده
An efficient multi-walled carbon nanotube/gold colloidal nanoparticle paste electrode (MWCNTs/ Au Nps PE) was prepared for detection of hydrazine in the presence of pyrogallol red as a mediator in the homogenous solution. The prepared MWCNTs/ Au Nps PE and multi-walled carbon nanotube paste electrode (MWCNTs PE) were characterized by Raman spectroscopy, scanning electron microscopy and cyclic voltammetry. The MWCNTs/ Au Nps PE exhibited a very large decrease in the over potential (0.3V to 0.0V) and significant enhanced peak current response for detection of hydrazine in the presence of pyrogallol red as a mediator in the Na2CO3 KCl solution. The mass transfer of hydrazine on the surface of MWCNTs/Au Nps PE was controlled by adsorption process. The proposed method exhibits outstanding sensitivity (2.5 μA/μM) and low detection limit (0.4 μM) at 0.0V. All the results indicated a good potential application of this sensor in the detection of hydrazine. The use of MWCNTs/ Au Nps PE was demonstrated for detection of hydrazine in the drinking water samples. KeywordsGold colloidal nanoparticles, Hydrazine, Multi walled carbon nanotube paste electrode, Cyclic voltammetry, Linear sweep voltammetry Analytical & Bioanalytical Electrochemistry 2015 by CEE www.abechem.com Anal. Bioanal. Electrochem., Vol. 7, No. 3, 2015, 277-290 278
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