نتایج جستجو برای: Multi-Wall

تعداد نتایج: 629447  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران 1380

در این پایان نامه خواص و جنبه های مختلف کربن معرفی و مروری کلی بر روشهای ساخت ، ساختار و خواص انواع مختلف کربن از کربنهای bulk(شامل گرافیت ، گرافیت turbostratic، الیاف کربن، دوده هاو ... ) تا کربنهای نانومقیاس (شامل fullerenes ، کپسولهای نانومقیاس ، کربنهای nanotube و ... ) ارائه می شود. عمده کار متوجه کربنهای nanotube(اعم از multi-wall و single-wall ) است و ساختار ، عیوب شبکه ای و روشهای ساخت ...

Journal: :inorganic chemistry research 0
mehdi araghi department of chemistry, saveh branch, islamic azad university, saveh, iran shaghayegh aghamohammad department of chemistry, saveh branch, islamic azad university, saveh, iran

in the present work, highly efficient oxidation of sulfides catalyzed by moo2(acac)2 supported on multi-wall carbon nanotubes, mwcnts, modified with 1,2-diaminobenzene (dab) and 2-aminophenol (ap), at room temperature are reported. the effects of various parameters such as reaction time, solvent, catalyst amount, oxidant, etc, were studied. these heterogenized catalysts showed high activity in ...

Journal: :journal of physical & theoretical chemistry 2010
navid nasirizadeh mohammad saber tehrani m. reza. shishehbore ah karimi mohammad. a. shirgholami

a new hydroxylamine sensor has been fabricated by immobilizing oxadiazol denvative at the surface ol aglassy carbon electrode (gce) modified by multi-wall carbon nanotube (mivcnt). the adsorbed thin illms oroxadiazol derivative on the mwcnt modified gce show a pair of peaks with surface confined characierisnus.the oxadiazol derivative mwcni (omwcnt) modified gce shows highly catalytic activity ...

Journal: :inorganic chemistry research 2014
mehdi araghi shaghayegh aghamohammad

in the present work, highly efficient oxidation of sulfides catalyzed by moo2(acac)2 supported on multi-wall carbon nanotubes, mwcnts, modified with 1,2-diaminobenzene (dab) and 2-aminophenol (ap), at room temperature are reported. the effects of various parameters such as reaction time, solvent, catalyst amount, oxidant, etc, were studied. these heterogenized catalysts showed high activity in ...

Journal: :analytical and bioanalytical chemistry research 2015
molla tefera shimelis admassie merid tessema solomon mehretie

a sensor, based on multi-wall carbon nanotubes modified glassy carbon electrode (mwcnt/gce), was developed for determination of fenitrothion. determining the surface area of mwcnt/gce showed that this surface is three times more active than that of a glassy carbon electrode. the experimental parameters, such as the amount of mwcnts, ph of the fenitrothion solution, preconcentration potential an...

Journal: :transport phenomena in nano and micro scales 2015
a. h. mahdizadeh moghaddam t. fanaei sheikhoeslami

a simple chemical vapor deposition technique at atmospheric pressure (apcvd) is adopted to synthesize the aligned arrays of functionalized multi-walled carbon nanotubes (amwcnts) without using any carrier gas, at 230◦c, 750◦c and 850 ◦c. camphor (c10h16o) is used as carbon source because this botanical hydrocarbon is chip and abundant which convert the cvd technique to a green method for produc...

Journal: :international journal of nanoscience and nanotechnology 2012
m. kolangikhah m. maghrebi k. ghazvini n. farhadian

in this study, salmonella typhimurium bacteria removal from polluted water has been investigated using multiwall carbon nanotubes arrays. experimental results reveal that the contact time, the bacterial concentration and the weight of multiwall carbon nanotubes arrays have positive significant effects on the bacteria removal efficiency. increasing the contact time and the weight of multiwall ca...

Journal: :analytical and bioanalytical chemistry research 2014
meissam noroozifar mozhgan khorasani motlagh reza akbari mojtaba bemanadi parizi

in this study, incorporation of iron ion-doped natrolite nanozeolite, multi-wall carbon nanotubes into chitosan-coated glassy carbon electrode for the simultaneous determination of ascorbic acid, epinephrine, uric acid and tyrosine is studied. the results show that the combination of multi-wall carbon nanotubes and iron ion-doped natrolite zeolite causes a dramatic enhancement in the sensitivit...

Journal: :journal of nanostructures 2015
m. ghorbanali a. mohammadi r. jalajerdi

mg(oh)2 nanoparticles were synthesized by a rapid microwave reaction. the effect of sodium dodecyl sulfonate (sds as anionic surfactant) and cetyl tri-methyl ammonium bromide (ctab as cationic surfactant) on the morphology of magnesium hydroxide nanostructures was investigated. multi wall carbon nano tubes was organo-modified for better dispersion in cellulose acetate matrix. the influence of m...

Journal: :international journal of nanoscience and nanotechnology 2008
h. delavari amrei m. r. mehrnia a. ghanizadeh m. m. montazer-rahmati

volumetric techniques were employed to study the adsorption of co2 on a purified multi-wall carbon nanotubes (mwnt’s) sample, as a mesoporous material, at isothermal conditions of 288, 293 and 298 k and pressures ranging from 30 to 150 kpa. langmuir, freundlich and sips equations were used to represent the isotherms. also the parameters of these fitted isotherm models have been determined. the ...

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