نتایج جستجو برای: porous semiconductor
تعداد نتایج: 109885 فیلتر نتایج به سال:
Semiconductor ZnO aerogels were synthesized by a sol–gel process with different concentrations (2.5–7.5 wt.%) of Al (n-type) or Na (p-type) and dried under supercritical CO2. The materials calcined at 500 °C to remove the organic content crystallize ZnO. microstructure ZnO-based comprises porous structure hexagonal platelet-shaped interconnected particles. bandgap doped decreased significantly ...
cuins2 nanostructures were synthesized via a simple surfactant-free solvothermal route. in this synthesis, thiosemicarbazide and thioglycolic acid were used as sulfur sources. the effects of different parameters such as type of precursor and time on the morphology and particle size of the samples have been investigated. the nanostructures were characterized by means of ...
the use of colored semiconductor oxide like copper (ii) oxide and nickel (ii) oxide for photocatalytic bleaching of rose bengal was investigated in detail. in order to harness the solar energy, the effective wavelength of the photocatalyst is to be expanded into the visible region and that increases the rate of photocatalytic bleaching of the dye. progress of the reaction was observed spectroph...
بیماری آتروسکلروسیس یکی ازمهمترین بیماریهای سیستم قلبی عروقی می باشد. دراین بیماری به علت عبور تدریجی چربیها از دیواره شریان و رسوب و انباشته شدن آنها در داخل دیواره، سطح مقطع شریان تنگ شده و در نتیجه دبی خون کم و رسیدن اکسیژن و مواد غذایی به بافت های اطراف کاهش می یابد. وجود گرفتگی در رگ باعث می شود که جریان طبیعی خون دچار اختلال گردد و این اختلال در جریان خون نیز نقش مهمی در بیماری های قلبی -...
Photocatalytic reduction of carbon dioxide to formaldehyde was investigated on four semiconductor photocatalysts (FeS, FeS/FeS2, NiO and TiO2). The reaction was carried out in continues flow of CO2 gas bubbled into the reactor. Semiconductor photocatalysts were characterized by X-Ray diffraction (XRD) and Diffuse Reflectance Spectroscopic (DRS) methods. Sulfide ion was used as hole scavenger. T...
in this paper, the effect of the brownian term in natural convection of cuo-water nanofluid inside a partially filled porous cavity, with internal heat generation has been studied. it is assumed that the viscosity and thermal conductivity of nanofluid consists of a static part and a brownian part of which is a function of temperature and the volume fraction of nanofluid. because of internal hea...
Nanoporous silicon powder was produced via efficient magnesiothermic reduction. In this work, the thermal effect and reduction process time were investigated on the porous silicon structure. The nanoporous silicon powders were characterized by X-ray diffraction analysis and field emission scanning electron microscopy. The results demonstrate that porous structure was changed to homogeneous and...
Importance of covalent bonded two-dimensional monolayer nanostructures and also hydrocarbons is undeniably responsible for creation of new fascinating materials like polyphenylene polymer, a hydrocarbon super honeycomb network, so-called porous graphene. The mechanical properties of porous graphene such as its Young’s modulus, Poisson’s ratio and the bulk modulus as the determinative properties...
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