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Seyed Naser Azizi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
HIndex:
Faculty: Faculty of Chemistry
Address:
Phone: 09111144457

Research

Title
Sensitive amperometric determination of hydrazine using a carbon paste electrode modified with silver-doped zeolite L nanoparticles
Type
JournalPaper
Keywords
Zeolite L nanoparticles; silver ions; electrocatalytic oxidation; hydrazine; amperometric sensor
Year
2017
Journal BULLETIN OF MATERIALS SCIENCE
DOI
Researchers Neda Salek Gilani ، Seyed Naser Azizi ، Shahram Ghasemi

Abstract

Silver-loaded nanozeolite-L-modified carbon paste electrode (Ag/L–CPE) was used as a novel sensing platform for enhanced electrocatalytic oxidation and determination of hydrazine. Zeolite L nanoparticles were synthesized via hydrothermal approach and then characterized using various techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electronic microscopy (SEM) and Brunauer–Emmett–Teller (BET). Silver-exchanged nanozeolite L (Ag/L) was prepared and mixed with carbon paste to prepare the modified electrode. Cyclic voltammetry studies revealed the high performance of Ag/L–CPE for electrocatalytic oxidation of hydrazine. Two linear ranges were detected in the amperometric detection of hydrazine. The first range was from 10μM to 0.4mM with sensitivity of 103.13 μA mM −1 and the second one was from 0.4 to 4mM with sensitivity of 58.131μAmM−1. The response time and detection limit (S/N = 3) of this sensor were determined to be 2s and 1.5μM, respectively. The unique porous structure of nanozeolite L offers a promising catalyst support candidate for efficient electrochemical sensing of hydrazine. The sensor exhibited appreciable repeatability, reproducibility and stability, and was able to detect hydrazine in the presence of even 500-fold excess concentrations of interfering species. Also, the sensor was used to determine hydrazine concentration in water samples with satisfactory results.