A simple method is reported for the preparation of silver nanoparticle (AgNP) embedded pH-responsive hydrogel microparticle catalyst via Michael addition gelation and in-situ nitrate (AgNO3) reduction. The AgNP-hydrogel microsphere exhibited an efficient reduction pollutants like 4-Nitrophenol (4-NP) Congo red (CR) under acidic medium with turn over frequency (TOF) ~170 h–1 ~124 respectively. I...

The main obstacle to the widespread dissemination of fuel cells is high cost, so researchers are actively searching for ways replace expensive platinum catalyst with cheaper analogs. In this paper we studied Ag- and Pd-containing carbon catalysts based on nanotubes graphene oxide. study textural characteristics showed that greatest specific surface area has a MWCNT containing 10% silver, all sy...

In this study, we used advanced oxidation process (AOP)for the removal of a cationic and anionic blue dyes, namely Basic Blue 3 (BB3) and Acid blue 62(AB62), from aqueous solutions. Fenton reactions are mixture of H2 O2 and Fe2+. However this paper investigates the application of twelve different catalysts such as: FeCl2 , FeSO4, (NH4 )Fe(SO4 )2 , FeCl3 , Nano iron (Fe0 ), Fe(NO3 )3 , K2FeO4 , ...

Microwave assisted facile one-step approach was adopted to prepare mono-dispersed silver sulfide nanoparticles. The structures of the synthesized Ag2S nanoparticles were confirmed by Fourier-transform infrared spectroscopy (FT-IR), diffuse reflectance UV-vis spectroscopy (DRS), X-ray diffractometer (XRD), energy dispersive X-ray analysis (EDX) and transmission electron microscope (TEM). The pre...

The effect that UV-LED irradiation exerted on a sodium-modified silver catalyst supported strontium carbonate (Ag-Na/SrCO3) was examined during an epoxidation of propylene to oxide. Based our previous study, we used Ag(56)-Na(1)/SrCO3 in this study. numbers parentheses refer the weight percentage and sodium. Although system did not contain typical photocatalysts such as titanium oxide or tungst...

Ag-exchanged Y zeolites (Si/Al = 2.5; Ag/Al 0.30–0.95) have been tested in the NH 3 –SCO reaction, most promising method for elimination of ammonia emissions, and deeply characterized before after reaction by using a variety techniques (XRD, TEM, UV–Vis, 109 Ag NMR, XAS spectroscopies). The active centres are 0 nanoparticles (NPs) formed under reduction conditions both activity selectivity to N...

La0.8Sr0.2MnO3 (LSM) catalyst is prepared via a sol-gel method and modified typical silver mirror reaction. Silver ammonia solution reduced in polyvinylpyrrolidone (PVP)-containing to obtain nanoparticles sodium dodecyl sulfate (SDS) added as surfactant. The microstructure morphology of the LSM-Ag composite powder are characterized. According results, Ag particles precipitate on LSM surface ele...

the our main goal of the present research is evaluating the performance of mno2 nanoparticles-agx zeolite composite as a novel adsorbent catalyst for the decontamination reactions of two most known sulfur mustard simulants; 2-chloroethyl phenyl sulfide (2-ceps), 2-chloroethyl ethyl sulfide (2-cees) at room temperature and monitoring by gas chromatography flame ionization detector (gc-fid) and g...

This paper argues that innovation can be best understood as an information process which is then concretized as a product that meets demand. Two very different firms, Canon Inc. and Apple Computer Inc., are used as case study illustrations. Innovation does not proceed through logical deduction, but rather is furthered by the use of metaphors and analogies. The bureaucratic and staid structures ...

The observation of Manchot? that sodium pentacyano-ammineferroate2 I absorbs oxygen has led Baudisch and his coworkers3 to study the catalytic action of this salt, as well as of its water analogue II, in the oxidation of pyrimidines and purines. The present authors have previously reported in this journal4 on the nature of the oxidation products obtained. In the present paper the problem is con...