A novel catalyst containing palladium nanoparticles supported on poly(2-hydroxyethyl methacrylate)/CMK-1: Synthesis, characterization and comparison with mesoporous silica nanocomposite

Kalbasi, Roozbeh Javad; Mosaddegh, Neda; Abbaspourrad, Alireza

doi:10.1016/j.apcata.2012.02.024

Cited by 19 publications

(17 citation statements)

References 44 publications

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“…However, nanoparticles frequently aggregate to yield bulk-like materials, which greatly reduce the catalytic activity and selectivity. Therefore, they must be embedded in matrices such as polymer or macromolecular organic ligands, [21][22][23] or immobilized in the pores of heterogeneous supports like ordered mesoporous silica. 24 Additionally, porous materials such as alumina, silica and zeolites have many advantages as supports due to their high surface areas and their easy separation from reaction mixtures.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Ni/mZSM-5 zeolite with a hierarchical pore structure by using KIT-6 as silica template: an efficient bi-functional catalyst for the reduction of nitro aromatic compounds

Mazaheri

Kalbasi

2015

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Ni/mZSM-5 zeolite with a hierarchical pore structure by using KIT-6 as silica template: an efficient bi-functional catalyst for the reduction of nitro aromatic compounds

Mazaheri

Kalbasi

2015

RSC Adv.

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“…The silver nanoparticles have been used for the purification of tap water in filter devices to inhibit the growth of microorganisms. Because Ag + ions are adsorbed to the negatively charged bacterial cell wall, the inactivation enzymes inhibited cell growth [38]. Since the reduction potential of silver (Ag + +e − ⟶Ag) and the reduction potential of mercury (Hg 2+ +2e − ⟶Hg) are E 0 = 0.08 V and 0.085 V, respectively, a high reactivity of Hg 2+ with bulk silver should not be expected.…”

mentioning

confidence: 99%

“…Therefore, the silver nanoparticle must be doped in an ordered mesoporous silica uniformly. Thus, the silver nanoparticle amount must be selected between 2.5 and 10 % [38]. In this case, the SBA-15 modified by silver nanoparticles such as a new antibacterial nanocomposite material has been studied for the removal of mercury ions from wastewater at room temperature (27 ± 1°C).…”

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confidence: 99%

The removal of mercury (II) from water by Ag supported on nanomesoporous silica

2016

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In this study, the synthesis of SBA-15/Ag nanocomposite materials with different amounts of silver (2.5, 5, and 10 %) has been investigated under acidic conditions by using P123 as a template via the direct method. The nanocomposites of SBA-15 were synthesized by the same method and by the addition of silver salt. Finally, the nanocomposite materials were examined for the removal of mercury ions from wastewater as an adsorbent by the reverse titration method. Characterization was carried out through x-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N 2 adsorption-desorption (Brunauer-EmmettTeller). XRD spectra confirmed the presence of silver nanoparticles within the amorphous silica matrix of SBA-15. The Barrett-Joyner-Halenda analysis showed that SBA-15 and SBA-15/Ag have a narrow pore size distribution. SEM images demonstrated that the morphology of the matrix of SBA-15 is in spherical state. Furthermore, wavelength dispersive x-ray spectroscopy identified the presence and distribution of silver nanoparticles inside the pore channels and outside of them. Typical TEM images of SBA-15 and SBA-15/Ag (5 wt.%) indicated a regular hexagonal pore structure with long-range order and long channels. In SBA-15/Ag (5 wt.%) sample, the nanoparticles of silver was found into the pores and outside of them. The removal of mercury ions from wastewater using mesoporous silica nanocomposite containing silver nanoparticles was studied by the reverse titration analysis. The best capacity of adsorption of mercury ions from wastewater was obtained for SBA-15/Ag (5 wt.%) sample, which was equal to 42.26 mg/g in 20 min at pH of 7. The Freundlich model was used to explain the adsorption characteristics for the heterogeneous surface, and K f (adsorption capacity) and n (adsorption intensity) were determined for Hg (II) ion adsorption on SBA-15/Ag nanocomposite materials with different amounts of silver (2.5, 5, and 10 %). The value of R 2 was about 0.99, 0.99, 0.98, and 0.98 and K f was about 42, 48, 58, and 58 mg/g for SBA-15/Ag, SBA-15/Ag (2.5 %), SBA-15/Ag (5 %), and SBA-15/Ag (10 %), respectively. Furthermore, the values of n >1 show a favorable adsorption process for Hg (II) ion adsorption on SBA-15/Ag nanocomposite materials. Moreover, the Langmuir isotherm model evaluation showed that the correlation coefficients for all concentrations were R 2 >0.99, indicating that Hg (II) ions were adsorbed on the surface of SBA-15/Ag via chemical and physical interaction. Additionally, the analytic hierarchy process (AHP) and Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) methods that depend on the criteria of the surface area, amount of adsorbent, pore volume, and cost of synthesis were used. The evaluation of results showed that the best sample was SBA-15/Ag (5 wt.%). Furthermore, the research work highlighted the antibacterial nanocomposite with suitable adsorption of Hg (II) ions from water solutions and supported its potential for environme...

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“…The mesoporous carbon was then obtained by the method of Kalbasli et al [17]. The fourth carbon used in this study, designated C b was carbon black (Degussa) with a specific surface area BET ~ 20 m 2 /g.…”

Section: Synthesis Of the Carbonsmentioning

confidence: 99%

Synthesis of nanostructured SiC by magnesiothermal reduction of silica from zeolite ZSM-5 and carbon: The effect of carbons from different sources

Mojarad

Nourbakhsh

Kahrizsangi

et al. 2015

Ceramics International

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A novel catalyst containing palladium nanoparticles supported on poly(2-hydroxyethyl methacrylate)/CMK-1: Synthesis, characterization and comparison with mesoporous silica nanocomposite

Cited by 19 publications

References 44 publications

Preparation and characterization of Ni/mZSM-5 zeolite with a hierarchical pore structure by using KIT-6 as silica template: an efficient bi-functional catalyst for the reduction of nitro aromatic compounds

Preparation and characterization of Ni/mZSM-5 zeolite with a hierarchical pore structure by using KIT-6 as silica template: an efficient bi-functional catalyst for the reduction of nitro aromatic compounds

The removal of mercury (II) from water by Ag supported on nanomesoporous silica

Synthesis of nanostructured SiC by magnesiothermal reduction of silica from zeolite ZSM-5 and carbon: The effect of carbons from different sources

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