محدثه سجادي

In this research, the synthesis of effective, new and heterogeneous (nano)structures based on tetrazole ligands and porous compounds and their application in the synthesis of tetrazoles, absorption of carbon dioxide (CO2), preparation of 5-hydroxymethylfurfural (HMF), production and hydrogen release (HER) have been investigated. In the first part, cyanamides and aryl halides have been used as an effective substance in the synthesis of various tetrazoles and the reactivity of tetrazole in organic reactions was investigated. Also, the reactivity of lignin-based tetrazoles as an acidic ionic liquid catalyst in the synthesis of HMF has been studied. The effect of different parameters including time and amount of acidic ionic liquid based on tetrazole used in HMF production was investigated. In the second part, tetrazole-based electrocatalysts were prepared on carbon paste substrates and used as working electrodes for hydrogen production. Also, metal-organic frameworks (MOF) of tetrazole were synthesized on nickel foam through electrochemical and used for hydrogen production. The effect of several important factors in electrochemical synthesis, including the time and amount of applied voltage, was investigated. Different electrochemical tests to measure the activity and stability of electrocatalysts were eva‎luated by linear scan voltammetry, cyclic voltammetry, Tafel polarization curve, impedance and chronopotentiometry in different acidic and basic electrolytes. In the third part, surface absorption of CO2 gas by polymer and MOF-based adsorbents was done using aminotetrazole and bistetrazole respectively in a discontinuous reactor. The effect of different operational conditions such as temperature, pressure and the amount of tetrazole used in the adsorbent modification on the surface absorption process was also investigated. Response surface method (RSM) was used to optimize the conditions. By isotherm, kinetic and thermodynamic modeling in MATLAB software and comparing the obtained data with the data of existing models, the behavior of the absorption process was determined to be close to the ideal model. Based on the results of this study, (electro)catalysts and adsorbents prepared based on tetrazole have good performance for all three catalytic, electrocatalytic and adsorption applications.

تترازول , نانوكاتاليست , (بيو)پليمر , كربن‌دي‌اكسيد , جاذب , (الكترو)كاتاليست , توليد هيدروژن , الكتروسنتز

Tetrazole , Nanocatalyst , (Bio)polymer , Carbon dioxide , Adsorbent , (Electro)catalyst , Hydrogen production , Electrosynthesis

Mohaddeseh Sajjadi

Dr. Hossein Ghafuri, Dr. Mahmoud Nasrollahzadeh