نتایج جستجو برای: tio2 sio2
تعداد نتایج: 35108 فیلتر نتایج به سال:
In this study, a facile, environmentally friendly, room-temperature synthesis of Ag-coated on microporous TiO2-based catalysts and their application as photocatalyst to degradation penicillin an antibiotic from pharmaceutical wastewater was investigated. The sol-gel method used for the preparation SiO2 SiO2@TiO2. Then, SiO2@TiO2 wrinkled using hydrothermal treatment. Finally, Ag plasmonic mater...
Supported gold nanoparticles are highly selective catalysts for a range of both liquid-phase and gas-phase hydrogenation reactions. However, little is known about their stability during gas-phase catalysis and the influence of the support thereon. We report on the activity, selectivity, and stability of 2-4 nm Au nanoparticulate catalysts, supported on either TiO2 or SiO2, for the hydrogenation...
Thermoresponsive TiO2/SiO2 one-dimensional photonic crystals (Bragg stacks) fabricated via sol–gel processing methods represent a promising class of environmentally responsive nanostructures featuring optically encoded temperature and humidity detection. The thermo-optic response of the layer materials is amplified by their inherent porosity owing to adsorption/desorption of ambient humidity in...
Engineered aluminum oxide (Al2O3), titanium dioxide (TiO2), and silicon dioxide (SiO2) nanoparticles (NPs) are utilized in a broad range of applications; causing noticeable quantities of these materials to be released into the environment. Issues of how and where these particles are distributed into the subsurface aquatic environment remain as major challenges for those in environmental enginee...
Maleimide-functionalized polystyrene (PSMA-SiO2/TiO2) hybrid nanocomposites were prepared by sol-gel reaction starting from tratraethoxysilane (TEOS) and titanium isopropoxide in the solution of polystyrene maleimide in 1,4-dioxane. The hybrid films were obtained by the hydrolysis and polycondensation of TEOS and titanium isopropoxide in maleimide-functionalized polystyrene solution followed by...
Suspensions of nanoparticles (SiO2, SiC, TiO2, CNT, Nanoclay and Hydroxyapatite) were spray dried to produce dry granulated products. The nanoparticles were consolidated in granules making them more convenient and safer to use in further processing compared to handling of nanopowders.
Effects of the suspended titanium dioxide nanoparticles (TiO2 NPs, 50 mg/L) on the cake layer formation in a submerged MBR were systematically investigated. With nanometer sizes, TiO2 NPs were found to aggravate membrane pore blocking but postpone cake layer fouling. TiO2 NPs showed obvious effects on the structure and the distribution of the organic and the inorganic compounds in cake layer. C...
در این پژوهش ابتدا نانوکامپوزیت SiO2/TiO2/پوسته فندق به عنوان جاذب، سنتز شده است و مشخصات مورفولوژی آن با استفاده ازSEM و FTIRمورد بررسی قرار گرفته است. نتایج حاکی از تشکیل ساختار آمورف نانوکامپوزیت و ساختار غیرهمگن است. هدف، ایجاد شرایط آزمایشگاهی برای حذف رنگ نساجی از محلول آبی به واسطه جذب آن توسط نانوکامپوزیت SiO2/TiO2/پوسته فندق بوده است. جذب مالاکیت سبز ما را به ارزیابی تأثیرpH ابتدایی،...
در این پروژه، پـــوشش های نازکی از نانو ذرات tio2 و tio2/sio2 با روش سل- ژل سنتز شده اند بر روی قالب های بتنی و قالب های ساخته شده از سیمان سفید و آلومینا لایه نشانی گردیده اند. نانوپودرهای tio2 وtio2/sio2 با اشعه ایکس شناسایی شده و اندازه ی بلورهای بدست آمده با استفاده از معادله شرر در حدود 5/11 نانومتر تخمین زده می شود. همچنین کاتالیزورهای سنتز شده با روش های xrd، ft-ir ، uv-vis و sem مورد...
Background and purpose: Photocatalysis process with TiO2 is a well-known method for removal of pollutants from water. However, the small particle size of TiO2, and therefore difficulty in its separation after treatment impede its commercialization. The aim of this study was to synthetize the Fe3O4@SiO2@TiO2 magnetic nanoparticles (NPs) and evaluation of its efficiency in removal of metronidazol...
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