نتایج جستجو برای: uv vis spectrophotometer

تعداد نتایج: 83388  

Journal: :Water 2021

Copper-nickel bimetallic nanoparticles (Cu-Ni BNPs) were fabricated using an eco-friendly green method of synthesis. An extract synthesized Gazania rigens was used for the synthesis BNPs followed by characterization employing different techniques including UV/Vis spectrophotometer, FTIR, XRD, and SEM. Spectrophotometric studies (UV-Vis FTIR) confirmed formation nanoparticles. The SEM indicated ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1394

سنتز نانوذرات zn2sno4 به چندین روش مورد مطالعه قرار گرفت و درنهایت به روش هیدروترمال با موفقیت سنتز شد.برای اولین بار نقره بادرصدهای مختلف به آن دوپه شد.از آنالیز xrdواسپکتروسکوپی uv-vis انعکاسی ومیکروسکوپ الکترونی روبشی (sem)برای شناسایی نانوذرات سنتز شده استفاده گردید از تکنیک اسپکتروسکوپی uv-vis جهت ارزیابی فعالیت فوتوکاتالیستی نمونه ها تحت تابش نور مرئی وuvدر حذف الاینده پارانیتروفنول از آب...

Journal: :iranian journal of catalysis 2015
leila vafayi soodabe gharibe

in this work, zno/sio2 nanoparticles were prepared using sol-gel method, and platinum particles were loaded on zno/sio2 nanoparticles by photoreductive method. samples were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem) and fourier transform infrared spectroscopy (ft-ir). the xrd patterns showed that the zinc oxide samples have a wurtzite structure (hexagonal phase...

Journal: :the iranian journal of pharmaceutical research 0
seyed karim hassaninejad-darzi department of chemistry, faculty of science, babol university of technology, babol, iran. abdolraouf samadi-maybodi analytical division, faculty of chemistry, university of mazandaran, babolsar, iran. seyed mohsen nikou analytical division, faculty of chemistry, university of mazandaran, babolsar, iran.

resolution of binary mixtures of theophylline (theo), montelukast (mkst) and loratadine (lora) with minimum sample pretreatment and without analyte separation has been successfully achieved by multivariate spectrophotometric calibration, together with partial least-squares (pls-1), principal component regression (pcr) and hybrid linear analysis (hla). data of analysis were obtained from uv–vis ...

Journal: :Applied sciences 2021

Laser ablation in liquid was utilized to prepare a TiO2 NP suspension deionized distilled water using Q-switch Nd: YAG laser at various energies and times. The samples were characterized UV–visible absorption spectra obtained with spectrophotometer (UV-Vis,) Fourier transform infrared (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM). While, UV-Vis showed the characteristi...

Journal: : 2022

In this study, many samples have been synthesized by using solution casting technique with different additive content of Chromium oxide nanoparticle (Cr2O3NPs), poly vinylalcohol (PVA) and polyethylene glycol (PEG). The UV-Vis. spectrophotometer used to record the absorbance spectrum in range (200-800) nm. absorption UV waves is improved while transmittance reduced when Cr2O3 NPs were added pol...

Journal: :Alkimia 2021

This study conducted to assess the most appropriate method or hydrolysis of beneng taro tuber optimize production bioethanol investigate effect pHs, times, and temperatures on reducing sugar produced. The concentration was determined using a UV-Vis spectrophotometer. result obtained indicated that optimum amount (910,875 mg/L ) achieved at pH 10, time 3 hours, temperature 90 °C. Fermentation po...

Journal: : 2021

Metal contamination is one of the most serious global problems. This investigation deals with use Aksaray pumice for adsorption cobalt ions. The factors affecting on were examined. Pumice activated at 873 K two hours before contact UV-Vis spectrophotometer was used to measure ions concentrations. response surface methodology utilized evolve predictive model pumice. experimental and predicted ma...

2004
Sabrina Conoci Santo Di Bella Salvatore Petralia Salvatore Sortino

The current applications of electronic devices are converging towards a global interconnection along with portability and compactness. This scenario implies the development of electronic components more and more small, fast, energy efficient and smart as well. The microelectronics industry faces these needs by both scaling and adding novel functions in integrated circuits. By going on such a tr...

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