نتایج جستجو برای: cuo zno nanocatalyst
تعداد نتایج: 24056 فیلتر نتایج به سال:
The brine shrimp, Artemia spp., is widely used in ecotoxicological research as a biological index. In the present study, aquatic stability and acute toxic effects of TiO2, CuO and ZnO nanoparticles (NPs) on Artemia franciscana were investigated. Acute exposure was conducted in sea water with different concentrations of selected nanoparticles at 24h, 48h, 72h and 96h. The mortality rate of A. fr...
Abstract CuO nanoparticles doped with various concentrations of ZnO (5, 10, and 15 mol%) were synthesized by using the solution combustion method. The as-synthesized characterized x-ray diffractometer (XRD), scanning electron microscope (SEM), transmission (TEM), UV–Vis spectroscope. XRD analysis revealed that physical parameters such as crystallite size lattice affected after doping ZnO. spect...
in present investigation, zno nanostructure was synthesized by means of a precipitation and sonochemical methods. the x-ray diffraction (xrd) pattern is shown that the wurtzite structure of zno has the hexagonal symmetry and there is no impurity. the average zno particles crystallite size was calculated about 41 nm. the sem and tem images reveal nanostructure zno particles with a cauliflower-li...
ZnO nanowires have been grown by chemical vapour deposition (CVD) using PdZn bimetallic nanoparticles to catalyse the process. Nanocatalyst particles with mean particle diameters of 2.6 ± 0.3 nm were shown to catalyse the growth process, displaying activities that compare well with those reported for sputtered systems. Since nanowire diameters are linked to catalyst morphology, the size-control...
در این پژوهش، سه مخلوط نانو cuo / zno و nio / zno و nio / cuo با مورفولوژی کروی و صفحه ای به روش رسوب گذاری با استفاده از الگو پلی اتیلن گلیکول (peg) سنتز شدند. روش استفاده در این پژوهش برای اولین بار در سنتز این مخلوط نانو ذرات ذکر شده به کار برده شد. به منظور سنتز این مخلوط نانو ذرات فرایند قلیایی کردن برای تشکیل رسوب ذرات فلزی انجام می شود. و پلیمر ها روی سطح مخلوط مواد اکسید فلزی جذب می شون...
in this study the application of zno nanoparticles to uv photocatalytic degradation of nonionic surfactanttriton x-100 in aqueous media was investigated. the affecting factors on the photodegradation such as tritonx-100 initial concentration, nanocatalyst weight, ph, temperature and other parameters were studied anddescribed in details. the degradation rate was found to be strongly influenced b...
فعالیت کاتالیستی و انتخاب پذیری هیدروژن در کاتالیست های مس بنیان که توسط اکسیدهای فلزی ZnO، 2CeO و 3O2Al بهبود یافته اند، برای تولید گزینشی هیدروژن در فرایند ریفورمینگ متانول با بخارآبمورد ارزیابی قرار گرفته است. نانوکاتالیست های 2CuO-ZnO-CeO و 3O2-Al 2CuO-ZnO-CeO به روش احتراقی (اوره به عنوان سوخت سنتز احتراقی)...
UNLABELLED TeO2-nanostructured sensors are seldom reported compared to other metal oxide semiconductor materials such as ZnO, In2O3, TiO2, Ga2O3, etc. TeO2/CuO core-shell nanorods were fabricated by thermal evaporation of Te powder followed by sputter deposition of CuO. Scanning electron microscopy and X-ray diffraction showed that each nanorod consisted of a single crystal TeO2 core and a poly...
The aim of this research work is Synthesis ZnO/SiO2 with Palash leaves extract nanocatalyst by green synthesis route. contain a broad variability bio-molecules which act as capping and reducing agents increases the rate reduction stabilization nanoparticles. Nanocatalyst synthesized method are eco-friendly cheap. No has been found on Butea monosperma (Palash) ZnO This palash extracts nanocataly...
CuO/ZnO nanocomposites were greenly prepared and tested for the catalytic degradation of methyl orange. The XRD analysis confirmed existence CuO ZnO with crystallite sizes within range 15–30 nm. TEM SEM images showed different morphological properties. TGA revealed a good thermal stability nanocomposite, total loss less than 18% at temperature 700 °C. orange under mild conditions catalyst mass/...
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