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- 저자 : Zahra Ranjkesh (검색결과 2 건)
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Production of novel activated carbon fibers from smoked cigarette wastes using NaOH
Zahra Ranjkesh,Komeil Nasouri 한국고분자학회 2023 Macromolecular Research Vol.31 No.7
This research reports the activated carbon fibers (ACFs) production from smoked cigarette wastes by a simple and facile technique. One-step carbonization/activation process with a NaOH activating agent has been considered for the first time. Cigarette waste-derived ACFs samples were synthesized using various NaOH concentrations and heating rates. The carbon yield, morphology, chemical composition, and surface area of the ACFs were analyzed and compared. Pre-treatment with NaOH activation agent improves the carbon yield, thermal stability, and surface area. The optimal microporous ACFs with 34.82 wt% of carbon yield and 1357 m2/g of surface area were synthesized by 10 g/L of NaOH pre-treatment and 2 ℃/min of heating rate. The ACFs samples synthesized with higher NaOH concentrations are mainly the mesoporous structure and lower surface area. This study presented a manageable approach for synthesizing high-performance ACFs with unique fibrous structures from smoked cigarette wastes. Main advantage of the designed procedure is establishing an environmentally friendly manufacturing of micro/ mesoporous ACFs.
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Zahra Asadi,Mozaffar Asadi,Fahimeh Dehghani Firuzabadi,Mohammad Ranjkesh Shorkaei 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
This study presents a new method in synthesis of nano uranyl Schiff base complexes. In thismethod slowaddition of dilute uranyl(VI) acetate solution to dilute Schiff base solution following the reflux for about24 h, yields nano uranyl(VI) Schiff base complexes. Characterization of Schiff base ligands and nanouranyl complexes has been done using 1H NMR, IR, UV–vis spectroscopy, elemental analysis. Schiff baseligands were synthesized by the condensation of one mole 3,4-diaminobenzophenone and two molessalicylaldehyde or substituted salicylaldehyde (3-OMe, 4-OMe, 5-OMe, 5-Br, 5-Cl). The electrochemicalproperties of the uranyl(IV) complexes were investigated by cyclic voltammetry. A good correlation wasobserved between the oxidation potentials and the electron withdrawing character of the substituentson the Schiff base ligands, according to the following trend: 5-MeO < H < 5-Br 5-Cl. Also the effect ofthe position of the substituted groups of Schiff base on the anodic potentials is as follows: 5-OMe < 3-OMe < 4-OMe.
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