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Masoud Salavati-Niasari,Faezeh Soofivand,Masoud Salavati-Niasari,Samira Bagheri 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
In this paper, barrium hexaferrite nanoparticles have been successfully synthesized via sol–gel auto combustion method based on the reaction between Ba(NO3)2 and Fe(NO3)3 in water, in present of maleic acid as capping agent and fuel. Also, various polymers used to obtaining pure phase barrium hexaferrite. The products were characterized by X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy analysis. To investigate the effects of amount of maleic acid and the kind of polymer on the morphology of products and finding optimal condition, several experiments were carried out. It was found that the phase and morphology of products could be influenced by these parameters. Vibrating sample magnetometer (VSM) was used to study the magnetism properties of BaFe12O19 samples.
Salavati-Niasari, Masoud,Mirsattari, Seyed Nezamodin,Saberyan, Kamal Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.2
Copper(II) complexes with tetraoxo dithia tetraaza macrocyclic ligands; [18]ane$N_4S_2$: 1,4,10,13-tetraaza-5,9,14,18-tetraoxo-7,16-dithia-cyclooctadecane, [20]ane$N_4S_2$: 1,5,11,15-tetraaza-6,10,16,20-tetraoxo-8,18-dithia-cyclocosane,Bzo2[18]ane$N_4S_2$: dibenzo-1,4,10,13-tetraaza-5,9,14,18-tetraoxo-7,16-dithia-cyclooctadecane, Bzo2[20]ane$N_4S_2$: dibenzo-1,5,11,15-tetraaza-6,10,16,20-tetraoxo-8,18-dithia-cyclocosane; were entrapped in the nanopores of zeolite-Y by a two-step process in the liquid phase: (i) adsorption of [bis(diamine)copper(II)] (diamine = 1,2-diaminoethane, 1,3-diaminopropane, 1,2-diaminobenzene, 1,3-diaminobenzene); $[Cu(N-N)_2]^{2+}$-NaY; in the nanopores of the zeolite, and (ii) in situ template condensation of the copper(II) precursor complex with thiodiglycolic acid. The obtained complexes and new host-guest nanocomposite materials; $[Cu([18]aneN_4S_2)]^{2+}-NaY,\;[Cu([20]aneN_4S_2)]^{2+}-NaY,\;[Cu(Bzo_2[18]aneN_4S_2)]^{2+}-NaY,\;[Cu(Bzo_2[20]aneN_4S_2)]^{2+}$-NaY; have been characterized by elemental analysis FT-IR, DRS and UV-Vis spectroscopic techniques, molar conductance and magnetic moment data, XRD and, as well as nitrogen adsorption. Analysis of data indicates all of the complexes have been encapsulated within nanopore of zeolite Y without affecting the zeolite framework structure.
Salavati-Niasari, Masoud,Bazarganipour, Mehdi Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.2
The chemical modification of multi-wall carbon nanotubes (MWNTs) is an emerging area in material science. In the present study, hydroxyl functionalized oxovanadium(IV) Schiff-base; N,N'-bis(4-hydroxysalicylidene)-ethylene-1, 2-diamineoxovanadium(IV), [VO($(OH)_2$-salen)]; has been covalently anchored on modified MWNTs. The new modified MWNTs ([VO($(OH)_2$-salen)]-MWNTs]) have been characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron (XPS), UV-Vis, Diffuse reflectance (DRS), FT-IR spectroscopy and elemental analysis. The analytical data indicated a composition corresponding to the mononuclear complex of tetradentate Schiff-base ligand. The characterization of the data showed the absence of extraneous complex, retention of MWNTs and covalently anchored on modified MWNTs. Liquid-phase oxidation of cyclohexane with $H_2O_2$ to a mixture of cyclohexanone, cyclohexanol and cyclohexane-1,2-diol in $CH_3$CN have been reported using oxovanadium(IV) Schiff-base complex covalently anchored on modified MWNTs as catalysts. This catalyst is more selective toward cyclohexanol formation.
Masoud Salavati-Niasari,Zeynab Behfard,Mahnaz Maddahfar 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A hydrothermal method was used to fabricate Bi2S3 with different morphologies (nanoparticles,nanoflaked flowers and nanothorny columniform structures) using bismuth(III) monosalicylate[BiO(C7H5O3)] and three kinds of sulfur sources [L-cysteine, thiourea and thioacetamide in water,respectively]. The influences of the reaction conditions are discussed and possible mechanism for theformation of different Bi2S3 nanostructures is proposed. The products were characterized by XRD, UV–vis, PL, FT-IR. Bismuth salicylate, which is known to be a complex, may play a critical role as a precursorand a template for the growth of linear bismuth sulfide nanorods.
Natural potato or carbon nanorods, spheres, spiral and nanoparticle structures
Masoud Salavati-Niasari,Parvaneh Ghaderi Sheikhiabadi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
The effect of hydrothermal treatments on the properties of the natural potato was investigated. The natural potato was chosen here because it is not only used for food, but also for other, nonfood purposes. The obtained carbon nano and microstructures with different morphologies and size were characterized by FT-IR, XRD, EDX, SEM and TEM. The effects of reaction parameters, such as temperature and reaction time on the morphology and particle size of products were investigated. To the best of our knowledge, there is no report on the fabrication of carbon nanostructures with natural potato.
Masoud Salavati-Niasari,Mehdi Bazarganipour 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.2
The chemical modification of multi-wall carbon nanotubes (MWNTs) is an emerging area in material science. In the present study, hydroxyl functionalized oxovanadium(IV) Schiff-base; N,N'-bis(4-hydroxysalicylidene)-ethylene-1, 2-diamineoxovanadium(IV), [VO((OH)2-salen)]; has been covalently anchored on modified MWNTs. The new modified MWNTs ([VO((OH)2-salen)]-MWNTs]) have been characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron (XPS), UV-Vis, Diffuse reflectance (DRS), FT-IR spectroscopy and elemental analysis. The analytical data indicated a composition corresponding to the mononuclear complex of tetradentate Schiff-base ligand. The characterization of the data showed the absence of extraneous complex, retention of MWNTs and covalently anchored on modified MWNTs. Liquid-phase oxidation of cyclohexane with H2O2 to a mixture of cyclohexanone, cyclohexanol and cyclohexane-1,2-diol in CH3CN have been reported using oxovanadium(IV) Schiff-base complex covalently anchored on modified MWNTs as catalysts. This catalyst is more selective toward cyclohexanol formation.
Pb(OH)I-graphene composite: Synthesis and characterization
Masoud Salavati-Niasari,Farnosh Tavakoli 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Pb(OH)I-graphene nanocomposite, has been successfully prepared via combination sonochemical andhydrothermal methods. Lead nitrate, lithium iodide and N,N-bis(salicylidene)-ethylenediamine(H2salen) were applied as starting reagents to fabricate Pb(OH)I-graphene nanocomposite. Forpreparing nanoparticles (NPs)-graphene composite post-graphenization method was applied. Insynthesis NPs-graphene with post-graphenization method, graphite oxide as starting reagent wassynthesized via Hummer method. The effect of ultrasonic irradiation and H2salen were investigated onthe particle size of nanoparticles and their distribution on the graphene sheets. H2salen and sonicationtreatment were confirmed to be the crucial factors that determining the formation of one-dimensionalPb(OH)I micro/nanostructures on the surface of graphene nanosheets. The as-produced nanocmpositeswere characterized with the aid of XRD, SEM, TEM, EDS and FT-IR.
Masoud Salavati-Niasari,Seyed Nezamodin Mirsattar,Kamal Saberyan 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.2
Copper(II) complexes with tetraoxo dithia tetraaza macrocyclic ligands; [18]aneN4S2: 1,4,10,13-tetraaza-5,9,14,18- tetraoxo-7,16-dithia-cyclooctadecane, [20]aneN4S2: 1,5,11,15-tetraaza-6,10,16,20-tetraoxo-8,18-dithia-cyclocosane, Bzo2[18]aneN4S2: dibenzo-1,4,10,13-tetraaza-5,9,14,18-tetraoxo-7,16-dithia-cyclooctadecane, Bzo2[20]aneN4S2: dibenzo- 1,5,11,15-tetraaza-6,10,16,20-tetraoxo-8,18-dithia-cyclocosane; were entrapped in the nanopores of zeolite-Y by a two-step process in the liquid phase: (i) adsorption of [bis(diamine)copper(II)] (diamine = 1,2-diaminoethane, 1,3-diaminopropane, 1,2-diaminobenzene, 1,3-diaminobenzene); [Cu(N-N)2]2+-NaY; in the nanopores of the zeolite, and (ii) in situ template condensation of the copper(II) precursor complex with thiodiglycolic acid. The obtained complexes and new host-guest nanocomposite materials; [Cu([18]aneN4S2)]2+-NaY, [Cu([20]aneN4S2)]2+- NaY, [Cu(Bzo2[18]aneN4S2)]2+-NaY, [Cu(Bzo2[20]aneN4S2)]2+-NaY; have been characterized by elemental analysis FT-IR, DRS and UV-Vis spectroscopic techniques, molar conductance and magnetic moment data, XRD and, as well as nitrogen adsorption. Analysis of data indicates all of the complexes have been encapsulated within nanopore of zeolite Y without affecting the zeolite framework structure.
Mahdiyeh Esmaeili-Zare,Masoud Salavati-Niasari,Azam Sobhani 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
A convenient sonochemical process for the preparation of mercury selenide (HgSe) nanoparticles has been developed based on the reaction of mercury salt and SeCl4 in the presence of triethanolamine (TEA) as complexing agent and N2H4 H2O (hydrazine hydrate) as the reductant agent at room temperature. The effects of preparation parameters such as metal salt, reaction time, reductant agent and its quantity on the morphology, the particle size and the phase of the final products have been investigated. The products were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray powder diffraction (XRD).
Hydrothermal synthesis and characterization of HgS nanostructures assisted by inorganic precursor
Fatemeh Sadat Sangsefidi,Masoud Salavati-Niasari,Mahdiyeh Esmaeili-Zare 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-
In this paper, HgS nanostructures were synthesized from the reaction of N,N0-(disalicylidene-1,4-diaminobutane) mercury complex, [Hg(salbn)] as a novel precursor, via hydrothermal method. Thismethod is facile and provides an appropriate condition for the preparation of structures with variousmorphologies. In this study, the effect of different parameters such as type of sulfur sources, reactiontime and type of alkaline source on the morphology and the particle size were studied. The resultsindicated that the type of sulfur source plays an important role in the morphology of as-synthesized HgS. The synthesized materials were characterized by means of X-ray diffraction, transmission electronmicroscopy, scanning electron microscopy, infrared spectrum and energy dispersive X-ray analysis. Flower-like HgS microcrystals were obtained by using TGA as sulfur source. The obtained results arediscussed in detail.