Maryam Malekzadeh; moghadaseh yahyapour
Abstract
This study presents the synthesis of Zn/La³⁺-based metal-organic frameworks (MOFs) using a co-precipitation assisted microwave method. Characterization through SEM and TEM revealed uniform nanoparticles around 80 nm. FT-IR spectroscopy confirmed the presence of key functional groups. Dynamic light ...
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This study presents the synthesis of Zn/La³⁺-based metal-organic frameworks (MOFs) using a co-precipitation assisted microwave method. Characterization through SEM and TEM revealed uniform nanoparticles around 80 nm. FT-IR spectroscopy confirmed the presence of key functional groups. Dynamic light scattering (DLS) showed highly uniform particle sizes. In vitro release studies of captopril from Zn/La³⁺/MOFs demonstrated a 41% release rate over 300 min, compared to 64% for pure captopril. Encapsulation within the MOF matrix ensured controlled and sustained drug release, with the first -order kinetic model fitting best. These Zn/La³⁺/MOFs show promise for enhanced and controlled drug delivery systems.
Tahereh Rohani; Moghadase Yahyapoor
Volume 4, Issue 1 , March 2017, , Pages 34-39
Abstract
In this work, a new method was developed for the catalytic reduction of hydrogen peroxide at glassy carbon electrode modified with silver nanoparticles and multi-wall carbon nanotubes. Silver incorporated in this modified electrode acted as catalyst to reduce hydrogen peroxide. First, the electrochemical ...
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In this work, a new method was developed for the catalytic reduction of hydrogen peroxide at glassy carbon electrode modified with silver nanoparticles and multi-wall carbon nanotubes. Silver incorporated in this modified electrode acted as catalyst to reduce hydrogen peroxide. First, the electrochemical behavior of silver, incorporated in modified electrode, was studied. The results illustrated the adsorption-controlled reaction at the modified electrode. Then, the behavior of catalytic reduction of hydrogen peroxide at the modified electrode was investigated. A linear calibration graph was obtained for hydrogen peroxide over the concentration range of 4.04×10−3 – 1.5×10−6 molL-1. The detection limit for hydrogen peroxide was estimated 1.42×10−7 molL-1. The relative standard deviation of ten replicate measurements (performed on a single electrode at hydrogen peroxide concentration of 1.5×10-4 molL−1) was 2.36%. The proposed electrode was used for the determination of hydrogen peroxide in real samples which led to satisfactory results.
