title: Synthesis and characterization of NaX nanozeolite using stem sweep as silica source and application of Ag-modified nanozeolite in electrocatalytic reduction of H2O2.
abstract: Nanozeolite is one of the three dimensional nanoporous materials consisting of extremely accessible surface area and shorter diffusion pathways. In this study, NaX nanozeolite is synthesized using the hydrothermal method from natural silica source of stem sweep ash (SSA). The synthesized nanoparticles were characterized using X-ray diffraction, scanning electronic microscopy, Brunauer-Emmett-Teller (BET) and FT-IR techniques. The synthesized nanozeolite is used incorporating Ag (I) ions for preparing modified carbon paste electrode (Ag/X-CPE) as an electrochemical sensor for the reduction of H2O2. Electrochemical results demonstrate that nanozeolite provides a promising platform for the development of electrochemical sensors in biosensing and Ag/X-CPE electrode possesses the remarkable catalytic activity toward the H2O2 reduction. Amprometric results show that this sensor could detect H2O2 in linear ranges of 20 µM to 1.76 mM and 1.76-11.76 mM with a detection limit of 9.1 µM at a signal-to-noise ratio of 3 and a response time of 2s. Furthermore, this sensor exhibited good anti-interference and selectivity.
authors: Analytical Division, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran. Electronic address: azizi@umz.ac.ir.
authors: Seyed Naser
authors: SN
authors: Azizi
authors: Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
authors: Shahram
authors: S
authors: Ghasemi
authors: Analytical Division, Faculty of Chemistry, University of Mazandaran, 47416-95447 Babolsar, Iran.
authors: Safura
authors: S
authors: Kavian
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006861:Hydrogen Peroxide / Q000032:analysis*; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D010084:Oxidation-Reduction; D059629:Signal-To-Noise Ratio; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry
chemical_list: D017641:Zeolites; D012834:Silver; D012822:Silicon Dioxide; D006861:Hydrogen Peroxide
keywords: Ag particles; Hydrogen peroxide; NaX nanozeolite; Stem sweep; modified electrode