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RISS 인기검색어
- 검색키워드
- 저자 : Mansour Ghaffari-Moghaddam (검색결과 3 건)
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Mansour Ghaffari-Moghaddam,Robabeh Hadi-Dabanlou 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
In this study, silver nanoparticles were synthesized using the Crataegus douglasii fruit extract as areducing agent. The reaction process was monitored by UV–vis spectroscopy. Further characterizationwas carried out using scanning electron microscopy (SEM). To optimize the biosynthesis of silvernanoparticles, the effect of process variables such as extract concentrations, mixing ratio of the reactants,time and pH were also investigated. The SEM images showed silver nanoparticles with 29.28 nm size andnearly spherical shape at 24 h interaction time. The antibacterial activity of the synthesized silvernanoparticles was confirmed against Staphylococcus aureus and Escherichia coli.
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Green synthesis of silver nanoparticles using plant extracts
Mansour Ghaffari-Moghaddam,Robabeh Hadi-Dabanlou,Mostafa Khajeh,Mansoureh Rakhshanipour,Kamyar Shameli 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.4
The strategy for design of new nanometals was developed due to their wide applications in many fields. One of the most important nanometals is silver nanoparticles (AgNPs) because of their extensive applications in biotechnologyand biomedical fields. AgNPs were usually synthesized by using chemical and physical methods. In thechemical methods, various toxic chemicals are used, which are harmful to the health of living organisms. Therefore,the AgNPs were synthesized by using biological methods based on green chemistry for reducing the toxic chemicals. There are various resources for green synthesis of AgNPs, such as bacteria, fungi, enzyme and plant extracts. The greensynthesis of AgNPs involves three main steps: the selection of the solvent medium, the selection of environmentallyreducing agents, and the selection of non-toxic substances for the stability of AgNPs. The biosynthesis of AgNPs usingplant extracts is more favorable than other biological methods because of removing the elaborate process of maintainingcell cultures. It can be also suitably scaled up for large scale production of AgNPs. This review focuses on green synthesisof AgNPs using various plant extracts.
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Asma Amini,Mostafa Khajeh,Ali Reza Oveisi,Saba Daliran,Mansour Ghaffari-Moghaddam,Hojat Samareh Delarami 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-
A novel adsorbent, GO/Fe3O4/OPO3H2/PCN-222, was successfully synthesized via graphene oxide (GO)modification with magnetic particles, phosphorous-containing groups, and a mesoporous Zr-MOF, PCN-222 (PCN stands for Porous Coordination Network), respectively, to give the nominal composite. The laststep was through a solvent-assisted ligand incorporation technique. Morphological, structural, andphysicochemical properties of the hybrid material was assessed by FT-IR, PXRD, SEM/EDX, BET surfacearea, VSM, TGA/DSC, UV–vis DRS, and ICP-OES analyses. This solid was then used for dispersive solidphase extraction of uranium ions dissolved in water. Several parameters including pH of solution,extraction and desorption times, amount of adsorbent, and type and concentration of elution solventwere investigated and optimized. The maximum adsorption capacity of adsorbent was found to be416.7 mg g 1 (pH, 6.2; amount of adsorbent, 5.0 mg; extraction time, 3.0 min) beyond what wasachievable with the individual components. In addition, various coordination modes between themultifunctional adsorbent and uranyl ions were investigated by DFT calculations in details, revealingsome favorable non-covalent cation–p interaction and strong binding of free-base porphyrin, carboxyland phosphorous-containing groups to the uranium ions. Under optimized conditions, highdetermination coefficient (R2 = 0.9994) was obtained and limit of detection and relative standarddeviation were found 0.9 mg L 1 and 2.7%, respectively
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