SBA-15-supported iron nanoparticles with improved optical properties, conductance and capacitance

Ouargli, R.; Khelil, M.; Nousir, Saadia; Benslama, R.; Ammar, Salah; Azzouz, Abdelkrim

doi:10.1016/j.cplett.2017.01.073

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…Successful results were obtained in previous works with sodium borohydride [12,13,30,31], affording MNP incorporation inside the channels of mesoporous SBA-15 and SBA-16 materials. The use of harmless and eco-friendly "green" reducing agent such as those provided by plants would be a judicious route to be explored.…”

Section: Introductionmentioning

confidence: 66%

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Effect of copper dispersion on SBA-15 and SBA-16 affinity towards carbon dioxide—an approach through thermal programmed desorption

et al. 2021

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A new approach for the synthesis of zero-valent copper nanoparticles (CuNP) supported on ordered mesoporous silica SBA-15 and SBA-16 by using vegetal antioxidants, coffee Robusta and green tea was developed in the present work. Diverse characterization techniques such as X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, and thermal programmed desorption of CO2 and water allowed stating that the appreciable specific surface area and porosity favored CuNP formation.Copper-loaded SBA-15 and SBA-16 exhibited higher surface basicity and hydrophilic character according to the type of the source of reducing agents and silica framework, respectively. OHcompounds interactions with both CuNP and SBA surface and more particularly with available Si-O-Si groups were found to promote metal dispersion reducing the particle size. The results obtained herein open promising prospects for designing low cost and "green" silica-based materials with judiciously tailored basicity and hydrophilic character for catalysis, adsorption and other surface processes.

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Section: Introductionmentioning

confidence: 66%

“…These interactions range from purely physical sorption to chemical reactivity [2]. Owing to some of these interactions, SBA materials can act as host matrices for metal nanoparticles (MNP) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effect of copper dispersion on SBA-15 and SBA-16 affinity towards carbon dioxide—an approach through thermal programmed desorption

et al. 2021

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“…Both NaMt and Fe(II)Mt, which were selected on the basis of their different behaviors in aqueous media and in ozonation [34,38,46], were further air-dried at 40 • C overnight. SBA-15 was synthesized by dissolving 6 g Pluronic P123 copolymer (EO20-PO70-EO20, supplied by Sigma-Aldrich) in 45 g deionized nanopure water at room temperature, then adding 180 g of 2 M aqueous solution of hydrochloric acid (HCl, 37%, Fluka), stirring for 30 min at 27 • C, and adding 12 g tetraethyl orthosilicate (TEOS, 98%, Sigma-Aldrich) and stirring at 40 • C for 20 h [70,72,74,92]. The resulting white powder was filtered, washed with water, air dried and calcined at 773 K for 6 h at a 1 K•min −1 heating rate.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Role of Silica on Clay-Catalyzed Ozonation for Total Mineralization of Bisphenol-A

et al. 2023

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Catalytic ozonation for the total mineralization of bisphenol-A (BPA) from aqueous solution was investigated in the presence of various silica-based catalysts such as mesoporous silica, acid-activated bentonite (HMt) and montmorillonite-rich materials (Mt) ion-exchanged with Na+ and Fe2+ cations (NaMt and Fe(II)Mt). The effects of the catalyst surface were studied by correlating the hydrophilic character and catalyst dispersion in the aqueous media to the silica content and BPA conversion. To the best of our knowledge, this approach has barely been tackled so far. Acid-activated and iron-free clay catalysts produced complete BPA degradation in short ozonation times. The catalytic activity was found to strongly depend on the hydrophilic character, which, in turn, depends on the Si content. Catalyst interactions with water and BPA appear to promote hydrophobic adsorption in high Si catalysts. These findings are of great importance because they allow tailoring silica-containing catalyst properties for specific features of the waters to be treated.

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“…SBA-15 is one of the mesoporous material from silica source that having uniform pore size with periodic of widths 50 to 300 Å and use of amphiphilic block copolymer as structure directing agent 2 . This material has excellent structure, such as a large specific surface area, large pore volume, array ordered hexagonal mesostructure that makes it widely used in the many practical application as catalyst support 3,4 , an adsorbent [4][5][6][7] , an immobilization substrate for biomolecules 8,9 and chemical sensor 10,11 . For the most industrial application of mesoporous material, the large surface area is important for catalysis.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mesoporous Silica Sba-15 Through Surfactant Set-Up and Hydrothermal Process

Thahir¹,

Wahab²,

Nafie³

et al. 2019

RJC

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The purpose of this study was synthesizing mesoporous silica SBA-15 and investigated the effect of the initial temperature of the preparation surfactant using the hydrothermal process to synthesize silica SBA-15. Pluronic (P123) as surfactant template and TEOS as material precursor acted as a building block of the mesoporous silica material. Therefore, the interaction surfactant template and precursor during the hydrothermal process guided to silica SBA-15 properties. The results suggested that the physicochemical properties of these materials did not change significantly, but different condition temperature of surfactant and hydrothermal process affected the size of the specific surface area, pore volume, and pore size distribution. The largest specific surface area was 560 m 2 g -1 , pore volume was 1.57 m 3 g -1 and ordered pore size distribution around 11.24 nm after the initial temperature of the surfactant at 15 o C and hydrothermal process at 100 o C for 48 h. This resulted properties of SBA-15 are potentially applicable in various chemical and non-chemical based industries.

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SBA-15-supported iron nanoparticles with improved optical properties, conductance and capacitance

Cited by 9 publications

References 38 publications

Effect of copper dispersion on SBA-15 and SBA-16 affinity towards carbon dioxide—an approach through thermal programmed desorption

Effect of copper dispersion on SBA-15 and SBA-16 affinity towards carbon dioxide—an approach through thermal programmed desorption

Role of Silica on Clay-Catalyzed Ozonation for Total Mineralization of Bisphenol-A

Synthesis of Mesoporous Silica Sba-15 Through Surfactant Set-Up and Hydrothermal Process

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