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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Quarterly Journal of Applied Chemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Sol-Gel,MgO,natural Hydrogel,Nanobiotechnology,Arabic Gum
- چکیده:
- چکیده انگلیسی: Magnesium oxide nanoparticles were synthesized using Arabic gum as a biotemplate and
magnesium nitrate as the magnesium source by the sol-gel method. This method has many
advantages such as nontoxic, economic viability, ease to scale up, less time consuming and
environmental friendly approach for the synthesis of MgO nanoparticles without using any
organic chemicals. Nanoparticles were characterized by Fourier transform infrared (FT-IR)
spectroscopy, UV-visible spectroscopy and powder X-ray diffraction (XRD). The average
crystallite size of MgO nanoparticles was calculated using Scherrer formula and Williamson
Hall equation. The powder X-ray diffraction (XRD) analysis revealed the formation of cubic
phase MgO with average particle size of 14 (Scherrer formula) and 5.3 (Williamson Hall
equation) nm.
- انتشار مقاله: 03-10-1396
- نویسندگان: Saeid Taghavi Fardood,Ali Ramazani,Sang Woo Joo
- مشاهده
- جایگاه : پژوهشی
- مجله: Quarterly Journal of Applied Chemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Sol-Gel,Nanoparticles,Biosynthesis,ZnO,Nanobiotechnology
- چکیده:
- چکیده انگلیسی: The use of plant extract is generating the interest of researchers toward cost effective,
nontoxic, economic viability and eco-friendly green synthesis of nanoparticles. In the present
work, zinc oxide (ZnO) nanoparticles were synthesized using black tea extract and zinc nitrate
as the zinc source by the sol-gel method. The synthesized ZnO nanoparticles were
characterized by powder X-ray diffraction (XRD), UV-visible spectroscopy and Fourier
Transform Infrared Spectroscopy (FTIR). The average crystallite size of ZnO nanoparticles
was calculated using Scherrer formula. The X-ray powder diffraction (XRD) analysis
revealed the formation of wurtzite hexagonal phase ZnO with average particle size of 32 nm.
- انتشار مقاله: 03-10-1396
- نویسندگان: Saeid Taghavi Fardood,Ali Ramazani,Sang Woo Joo
- مشاهده
- جایگاه : پژوهشی
- مجله: Quarterly Journal of Applied Chemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Sol-Gel,α-Fe2O3,natural Hydrogel,Tragacanth gel,Nanobiotechnology
- چکیده:
- چکیده انگلیسی: α-Fe2O3 (hematite) nanoparticles were synthesized using tragacanth gel as biotemplate and
iron chloride as the iron source by the sol-gel method. This method has many advantages such
as nontoxic, economic viability, ease to scale up, less time consuming and environmental
friendly approach for the synthesis of α-Fe2O3 nanoparticles without using any organic
chemicals. Nanoparticles were characterized by Fourier transform infrared (FT-IR)
spectroscopy, UV-visible spectroscopy and X-ray diffraction (XRD). The powder X-ray
diffraction (XRD) analysis revealed the formation of Rhombohedral phase α-Fe2O3 with
average particle size of 21 nm.
- انتشار مقاله: 05-05-1396
- نویسندگان: Saeid Taghavi Fardood,Ali Ramazani,Zahra Golfar,Sang Woo Joo
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Nanostructures
- نوع مقاله: Journal Article
- کلمات کلیدی: Oxidation,Hydrogen peroxide,Nanomagnetic catalyst,Oxone,Magnesium Ferrite
- چکیده:
- چکیده انگلیسی: Nanomagnetic MgFe2O4 is an active, stable, and reusable catalyst for the oxidation of alcohols. The oxidation of various primary and secondary alcohols has been examined and related corresponding products were obtained in good yields. The reactions were carried out in the presence of water as solvent and oxone (at room temperature) or H2O2 (at 60 ºC) as an oxidant. The catalyst was investigated by X-ray powder diffraction, scanning electron microscope, inductively coupled plasma and infrared techniques. Furthermore, the catalyst could be easily recovered and reused up to 7 runs without loss of activity.
- انتشار مقاله: 27-05-1395
- نویسندگان: Fariba Sadri,Ali Ramazani,Hamideh Ahankar,Saeid Taghavi Fardood,Pegah Azimzadeh Asiabi,Mehdi Khoobi,Sang Woo Joo,Nahid Dayyani
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Nanostructures
- نوع مقاله: Journal Article
- کلمات کلیدی: Coffee,Sol gel,Nanobiotechnology,Copper oxide nanoparticles
- چکیده:
- چکیده انگلیسی: The use of plant extract is generating interest of researchers toward cost effective and eco-friendly green synthesis of nanoparticles. In the present work, Cupric oxide nanoparticles were synthesized using coffee powder extracts by the sol-gel method at different calcination temperatures. The synthesized nanoparticles were characterized by X-ray diffraction, scanning electron microscopy , ultraviolet -visible spectroscopy and Fourier transform infrared spectroscopy. The powder X-ray diffraction analysis revealed the formation of single-phase copper oxide with a monoclinic structure.
- انتشار مقاله: 26-03-1395
- نویسندگان: Saeid Taghavi Fardood,Ali Ramazani
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Chemical Reviews
- نوع مقاله: Journal Article
- کلمات کلیدی: Dye degradation,Nanotechnology,Photocatalysis,Magnetic nanoparticles,zinc ferrite
- چکیده:
- چکیده انگلیسی: Organic pollutants are the largest kind of pollutants released into waters and wastewater from the some industry and industrial processes. Photocatalytic degradation is one of the significant and effective methods to remove the dyes and other organic pollutant from water and wastewater. This mini-review presents the application of zinc ferrites and ZnFe2O4-based composites in the photocatalytic degradation of organic dye. The zinc ferrite nanomaterials are obtained mainly by thermal methods, sol-gel, co-precipitation, and solid-state or hydrothermal route. Zinc Ferrites have good photocatalytic activity, but when exploited as composite photocatalysts, their photocatalytic efficiency were increased. AS a critical magnetic material, the ZnFe2O4 spinel structure has been proven to be useful in removal dye, ZnFe2O4 have photocatalytic activity under visible light irradiation. However, it is possible to improve the efficiency of photocatalysis activity of ZnFe2O4 by coupling it with another semiconductor or coupling it with carbon nanotubes and graphene, resulting in enhanced photocatalytic performance.
- انتشار مقاله: 10-08-1398
- نویسندگان: Fatemeh Ajormal,Farzaneh Moradnia,Saeid Taghavi Fardood,Ali Ramazani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Catalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Microwave Irradiation,Solvent-free,Magnetic nanoparticles,Ferrite,Tetrahydrobrnzo[b]pyran drivetives
- چکیده:
- چکیده انگلیسی: Ni0.5Cu0.5Fe2O4 magnetic nanoparticles using Arabic gel (AG) as a reducing and stabilizing agent was prepared by the sol-method. The catalyst identification was performed using Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The magnetic analysis showed that the Ni0.5Cu0.5Fe2O4 had a ferromagnetic behavior with a saturation magnetization of 31.22 emu/g at room temperature. Then, Ni0.5Cu0.5Fe2O4 magnetic nanoparticles were applied as a green, convenient, effective and reusable catalyst for the one-pot three-component synthesis of tetrahydrobenzo[b]pyrans in good to excellent yields. It should be noted, the nanocatalyst is separated by a magnet was used several times and it was as efficient as ever.
- انتشار مقاله: 27-12-1398
- نویسندگان: Hamideh Ahankar,Saeid Taghavi Fardood,Ali Ramazani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Catalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Oxidation,Alcohols,Nanomagnetic catalyst,Copper ferrite,Tragacanth gel
- چکیده:
- چکیده انگلیسی: During this study, we report the green synthesis of magnetic copper ferrite nanoparticles using tragacanth gum as a reducing and stabilizing agent by the sol-gel method. The green synthesized CuFe2O4 MNPs are characterized by powder X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM). The X-ray powder diffraction (XRD) analysis revealed the formation of Cubic phase ferrite MNPs with average crystallite size of 14 nm. This study has demonstrated that CuFe2O4 nanoparticles can act as an efficient catalyst for selective oxidations of alcohols applying oxone (potassium hydrogen monopersulfate) as oxidant in the presence of acetonitrile as solvent at 40 ºC. Primary and secondary alcohols gave the corresponding products in good yields. Furthermore, the catalyst can be simply recovered and reused several times with almost no loss in activity.
- انتشار مقاله: 22-10-1395
- نویسندگان: Ali Ramazani,Saeid Taghavi Fardood,Zahra Hosseinzadeh,Fariba Sadri,Sang Woo Joo
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: ultrasonic irradiation,Ferrites,tragacanth gum,natural Hydrogel,HBIW
- چکیده:
- چکیده انگلیسی: Here, we report the synthesis, characterization, and catalytic evaluation of Ni-Cu-Mg ferrite using tragacanth gum as biotemplate and Metals nitrate as the metal source by the sol-gel method without using any organic chemicals. The sample was characterized by powder X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Vibrating Sample Magnetometer (VSM), and Scanning Electron Microscopy (SEM). The X-Ray powder Diffraction (XRD) analysis revealed the formation of Cubic phase ferriteMNPs with an average particle size of 19 nm. The magnetic analysis revealed that the Ni-Cu-Mg ferrite nanoparticles had a ferromagnetic behavior at room temperature with a saturation magnetization of 27.85 emu/g. The catalytic activity of Ni-Cu-Mg ferrite MNPs was evaluated for the synthesis of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazatetracyclo [5.5.0.05,9.03,11 ] dodecane (HBIW) under ultrasonic irradiation. The catalyst could easily be recycled and reused a few times without a noticeable decrease in catalytic activity.
- انتشار مقاله: 03-04-1397
- نویسندگان: Saeid Taghavi Fardood,Behrooz Ebadzadeh,Ali Ramazani
- مشاهده
- جایگاه : پژوهشی
- مجله: Chemical Methodologies
- نوع مقاله: Journal Article
- کلمات کلیدی: Catalyst,Iron (III) chloride,Solvent free
- چکیده:
- چکیده انگلیسی: Three-component coupling of 2-naphthol, aldehydes, and urea has been accomplished in the presence of FeCl3 under microwave irradiation and solvent-free conditions to afford the corresponding synthesis of 1-phenyl-1, 2-dihydro-3H-naphtho[1,2-e][1,3]oxazin-3-onederivatives in excellent yields. It is a promising catalyst for the microwave-assisted reaction providing high product yield in a short period.
- انتشار مقاله: 22-10-1397
- نویسندگان: Saeid Taghavi Fardood,Ali Ramazani,Morteza Ayubi,Farzaneh Moradnia,Shahin Abdpour,Reza Forootan
- مشاهده