نتایج جستجو برای: n2h4
تعداد نتایج: 123 فیلتر نتایج به سال:
A simple and efficient method was introduced for the high-conversion preparation of graphene oxide (GO) from large graphite flakes (average flake size1⁄4100 μm) using a simplified Hummer's method. Natural reducing agents such as lemon juice and vinegar were compared with hydrazine (N2H4) as potential reducing agents. Graphene was prepared by chemical reduction of GO because this method was low ...
Hydrazine borane N2H4BH3 and alkali derivatives (i.e., lithium, sodium and potassium hydrazinidoboranes MN2H3BH3 with M = Li, Na and K) have been considered as potential chemical hydrogen storage materials. They belong to the family of boronand nitrogen-based materials and the present article aims at providing a timely review while focusing on fundamentals so that their effective potential in t...
Self-assembly is the basic feature of supramolecular chemistry, which permits to integrate and enhance the functionalities of nano-objects. However, the conversion of self-assembled structures to practical materials is still laborious. In this work, on the basis of studying one-pot synthesis, spontaneous assembly, and in situ polymerization of aqueous semiconductor nanocrystals (NCs), NC self-a...
Tremendous efforts have been devoted to increasing the CO2 capture performance of porous materials, especially for low CO2 concentration environments. Here, we report that hydrazine can be used as a diamine short enough to functionalize the small-pore metal–organic framework [Mg2(dobdc)] (H4dobdc 1⁄4 2,5-dihydroxyl-1,4-benzenedicarboxylic acid). By virtue of the ultrahigh concentration of free ...
Ammonia synthesis is the single most important chemical process in industry and has used the successful heterogeneous Haber-Bosch catalyst for over 100 years and requires processing under both high temperature (300-500 °C) and pressure (200-300 atm); thus, it has huge energy costs accounting for about 1-3% of human's energy consumption. Therefore, there has been a long and vigorous exploration ...
We have performed a density functional theory investigation on the structural and electronic properties of pristine and Nitrogen-doped TiO2 anatase nanoparticles as the adsorbents for removal and degradation of hydrazine molecules in the environment. We have presented the most stable adsorption configurations and examined the interaction of hydrazine molecule with these doped and undoped nanopa...
We have performed a density functional theory investigation on the structural and electronic properties of pristine and Nitrogen-doped TiO2 anatase nanoparticles as the adsorbents for removal and degradation of hydrazine molecules in the environment. We have presented the most stable adsorption configurations and examined the interaction of hydrazine molecule with these doped and undoped nanopa...
Transition metal phosphides are a group of compounds with interesting chemical/physical properties and potential applications in various fields, such as electronics, magnetism, photonics, catalysis, and so on1–4. In particular, metal phosphides (e.g. MoP, Ni2P, WP, Fe2P and Co2P) have been used as catalysts and extensively studied for hydrotreating reactions5–8. Among these phosphides, MoP, Ni2...
در این تحقیق جهت تهیه کاتالیست¬های مورد استفاده در فرآیند رفرمینگ برای اولین بار از سیستم-های میکروامولسیونی استفاده شد. برای تحقق این هدف، ابتدا دیاگرام فاز سیستم میکروامولسیونی شامل aot+ سیکوهگزان+ آب، از نظر ترمودینامیکی مورد بررسی قرار گرفت و محدوده پایداری نانوراکتورهای مورد آزمایش یعنی thigh و tlow تعیین شد. سپس نانوذرات پلاتین در نانوراکتورهای مایسل معکوس تهیه شدند. آنالیزهای uv-vis و se...
In order to maintain the availability of electricity supply, a failure at power plant is mandatory be prevented. If damage has occurred, analysis root cause must prioritized resolve problem and prevent further damage. One important units in boiler that role as steam generator producing by changing water liquid vapor phase. The quality (feed) becomes one crucial factor determining lifetime boile...
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