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In this work, a spectroscopic and structural characterization of diatomaceous earth-montmorillonite clays after impregnated with silver nanoparticles were carried out. The silver nanoparticles were synthesized by chemical reduction with sodium borohydride starting from silver nitrate solution. The obtained nanoparticles were stabilized with polyvinyl-pyrrolidone as a surface agent.
nanoparticles, biopolymer and clay minerals. In the present study the efficiency of nanobiocomposite composed of bimetallic Zn-Ag nanoparticles, montmorillonite, chitosan, gum ghatti and poly lactic acid were evaluated with respective to achievable MCP adsorption from aqueous environment.
Montmorillonite-cysteine could be used as the immobilizer, detector, and detoxifier of heavy metals. To further the understanding and the application, the interaction between the montmorillonite and cysteine and the adsorption of cysteine on montmorillonite and .
ARTICLE . Study of silver adsorption on montmorillonite . Petr Praus I, *; Martina Turicová I; Marta Valásková II. I Department of Analytical Chemistry and Material Testing, VSB-Technical University of Ostrava 17. listopadu 15, 708 33 Ostrava-Poruba, Czech Republic II Nanotechnology Centre, VSB-Technical University of Ostrava, 17. listopadu 15, 708 33 .
This study investigated the application of organo-clay as a support in the synthesis of silver nanoparticles with increased antimicrobial activity – the Ag-montmorillonite nanocomposite (Ag-MMT). This technology is utilized to improve the antibacterial function of materials, especially those used in polymeric nanocomposites. This purpose fulfils the recently increasing public concerns on ...
Silica and montmorillonite-supported silica nanoparticles were prepared via an acid one step sol-gel process. The syn-thesized solids were characterized using XRD, FTIR, TEM and N. 2. adsorption. The effect of preparing temperatures on the structure and properties of the silica nanoparticles were studied. The results show that the increase of ...
So, many Ag-NPs/clays nanocomposites have been developed ( Shameli et al. 2010;Zhang et al. 2013; Praus et al. 2010; Cabal et al. 2010;Huang and Yang 2008), and it was found that the nanoparticles ...
The adsorption capacities of bentonite and montmorillonite nanoparticles at pH = 3 are 4.45 and 3.85 mg/g, respectively. As both of these adsorbents have positive charge in acidic pH and the fluoride anion has negative charge, the removal process increases markedly in acidic pH.
Ag/kaolin nanocomposite was prepared by reduction of Ag + ion with ethanol at alkaline condition on kaolin surface. Nanocomposite was characterized by FTIR, XRD, TEM, and BET methods. Results showed the Ag/kaolin composite has particle size 50 nm. The surface area was increased from kaolin to Ag/kaolin from 1.0215 to 7.409 m2 g−1, .
Nanocrystalline ZnO particles have been prepared with different methods using zinc cyclohexanebutyrate as precursor in dimethyl sulfoxide (DMSO) medium via alkaline hydrolysis. A series of preparations were carried out in the presence of layered silicates (kaolinite and montmorillonite). It was revealed by different measurement techniques that the presence of the clay .
The results indicated intercalation of Ag and Ag 2 CO 3 nanoparticles into the montmorillonite clay layers. The diffuse reflectance spectra exhibited a strong surface plasmon resonance (SPR) adsorption peak in the visible region, resulting from Ag nanoparticles.
In this study, a natural zeolite clinoptilolite-type was impregnated through homogeneous and heterogeneous nucleation with silver nanoparticles. The synthesis of Ag nanoparticles was carried out by chemical reduction of silver nitrate (AgNO3) with sodium borohydride (NaBH4). In the case of homogeneous nucleation, colloidal solution of Ag nanoparticles at concentrations of 1, 2 and 4 parts .
Structural andChemical Characterization ofMetals, AlloysandCompounds Selected peerreviewed papersfrom the International Materials ResearchCongress (IMRC2012), Symposium onStructural andChemical Characterization of Metals, Alloys andCompounds August12-17, 2012, Cancun, Mexico RamiroPerezCampos,AntonioContrerasCuevas andRodrigoA. EsparzaMuhoz .
(±1) nm, respectively for clay and Ag/SnO2/clay nanocomposites mode powder. As shown in Fig. 2 the original d-spacing of clay, 3.32Ǻ and 2.34Ǻ of Ag/SnO2/clay nanocomposites 2θ angles (2θ = 26.82° and 38.29Ǻ respectivelly). This value is a direct proof of .
Jan 18, 2016· Perovskite LaFeO3/montmorillonite nanocomposites (LaFeO3/MMT) have been successfully prepared via assembling LaFeO3 nanoparticles on the surface of montmorillonite with citric acid assisted sol ...
In this work, the removal of Ag nanoparticles (AgNPs) using aqueous sodium montmorillonite nanoclay in the presence of a cationic surfactant stabiliser was investigated. The effects of experimental parameters on the adsorption process, such as pH, surfactant concentration, adsorbent dosage, initial AgNPs concentration and contact time, were ...
Abstract: The silver nanoparticles supported on aluminum pillared Clay (Ag/Al-B), with Ag content of about 1%, were used for the free catalyzed oxidation of cyclohexene with hydrogen peroxide (H2O2). The structure of the material was subsequently studied by IR, BET, and X-ray diffraction analysis. The silver supported on aluminium pillared clay ...
Feb 28, 2018· Sorption of heavy metals plays a vital role in controlling environmental pollution. Here, we reviewed the sorption of heavy metals such as Ni, Co, Cu, Zn, V, Pb, Hg, In, As, Cd, Cr, Ga, Cs, Mn, V, Eu, Mo, Th, TI and Cr on metal oxides and clay minerals. The mechanism of association between these ions and the host minerals, and the factors controlling their sorption are discussed in detail.
The adsorption capacity of starch/Na-MMT nanocomposites (10:1, 5:1 and 10:3) was calculated through the equilibrium data from batch adsorption experiments at three pH values (3, 4.5 and 6) in nickel and cobalt solutions. The adsorption curve of Ni (II) and Co (II) ions is presented in Appendix section (see Figures A1 and A2). These curves ...
This study reports the carbon dioxide (CO 2 ) adsorption on montmorillonite (NaMt) incorporating Cu 0, Fe 0, Pd 0 and Ag 0 as metallic nanoparticles (MNPs). The changes in structural, textural, morphological and adsorption properties of the resulting materials (NaMt-MNPs) were investigated.
Smectite clays have excellent swelling and adsorption ability, which is especially interesting for the impregnation of antibacterial-active nano-size metals in the interlamellar space of clay.5,6 Montmorillonite (MMT) as lamellar clay has intercalation, ... The silver nanoparticles (Ag NPs) deposited on inorganic substrates, such as TiO 2, ...
Dec 04, 2013· Zhou et al. studied the stability of montmorillonite particles in the presence of Ag and TiO 2 nanoparticles. Their study suggests that the stability of a binary clay-nanoparticle system is dependent on the non-uniform distribution of the surface charge of clay platelets and additional surface contact interactions between clay particles and ...
Ag Nanoparticles Adsorption on Diatom-Montmorillonite Clays ... In this work, a spectroscopic and structural characterization of diatomaceous earth-montmorillonite clays after impregnated with ...
Main content area. Effects of heteroaggregation with metal oxides and clays on tetracycline adsorption by graphene oxide
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