سید ناصر عزیزی

In this work, NaY zeolite was synthesized by an inexpensive raw material i.e. silica extracted from ricehusk ash by using two-step seeding process. It was characterized by X-ray diffraction (XRD), Fouriertransform infrared (FT-IR), Brunauer-Emmett-Teller (BET), Barrett-Joyner-Halenda (BJH) and scanningelectron microscopy (SEM). The results confirmed that the well-shaped zeolite Y with high crystallinityand proper porosity was formed. Then, the zeolite NaY modified carbon paste electrode was used as aplatform for preparation of silver nanoparticles (AgY/CPE). The FE-SEM confirmed the formation of Agnanoparticles on the surface of electrode. The modified electrode was used for electrocatalytic reductionof H2O2in phosphate buffer solution (pH = 7.0). The proposed sensor could detect the H2O2in the linearrange of 0.02–5.0 mM with a detection limit of 1.4 M at a signal to noise ratio of 3 and response timeof 5 s. The sensitivity of the sensor was 650.7 A mM−1cm−2. Furthermore, it exhibited no interferencewith some biological species such as glucose, ascorbic acid, sucrose and uric acid.