Synthesis of Ag/SiO2 nanosize particles by reverse micelle and sol-gel processing

Bae, Dong‐Sik; Park, Sang Whan; Han, Kwan-Young; Adair, James H.

doi:10.1007/bf03186086

Cited by 16 publications

(12 citation statements)

References 10 publications

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“…The UV source requires large quantities of electrical energy which would result in high costs in practical applications [52]. Moreover, titania is characterised by low quantum yields (i.e., low electron transfer rate) resulting in high electron-hole pair recombination which results in the termination of the photocatalytic reactions [41,104,168,[178][179][180]. As a result, a 8 Journal of Nanomaterials number of reformative initiatives have been investigated as a means of overcoming these drawbacks.…”

Section: Properties Ofmentioning

confidence: 99%

Recent Developments in Environmental Photocatalytic Degradation of Organic Pollutants: The Case of Titanium Dioxide Nanoparticles—A Review

Mahlambi

Ngila

Mamba

2015

Journal of Nanomaterials

217

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The presence of both organic and inorganic pollutants in water due to industrial, agricultural, and domestic activities has led to the global need for the development of new, improved, and advanced but effective technologies to effectively address the challenges of water quality. It is therefore necessary to develop a technology which would completely remove contaminants from contaminated waters. TiO2(titania) nanocatalysts have a proven potential to treat “difficult-to-remove” contaminants and thus are expected to play an important role in the remediation of environmental and pollution challenges. Titania nanoparticles are intended to be both supplementary and complementary to the present water-treatment technologies through the destruction or transformation of hazardous chemical wastes to innocuous end-products, that is, CO2and H2O. This paper therefore explores and summarizes recent efforts in the area of titania nanoparticle synthesis, modifications, and application of titania nanoparticles for water treatment purposes.

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Section: Properties Ofmentioning

confidence: 99%

Recent Developments in Environmental Photocatalytic Degradation of Organic Pollutants: The Case of Titanium Dioxide Nanoparticles—A Review

Mahlambi

Ngila

Mamba

2015

Journal of Nanomaterials

217

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“…Typically, Ag@SiO 2 composites are synthesized by Ag-seeded growth of silica through a Stöber method or a reverse microemulsion method [ 1 , 11 , 12 , 13 , 14 , 26 ]. The cores (Ag NPs) are stabilized with organic surfactants [ 1 , 10 ] or polymers [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ethanol on Ag@Mesoporous Silica Formation by In Situ Modified Stöber Method

Chen

Granbohm

et al. 2018

Nanomaterials

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Tunable core-shell Ag@Mesoporous SiO2 spheres were synthesized via an in situ modified Stöber approach by varying the amount of ethanol (EtOH) expanding their potentials in many applications. Mesoporous silica was generated by adding tetraethyl orthosilicate (TEOS) to the mixture of colloidal Ag particles prepared by reducing silver nitrate (AgNO3) with L-ascorbic acid and using hexadecyltrimethylammonium bromide (CTAB) as a template at the presence of ethanol and sodium hydroxide (NaOH) at pH 10 as a catalyst. The average sizes of the Ag cores at the three increasing volumes of ethanol were ~47 ± 6, 36 ± 4, and 11 ± 5 nm, while the silica particle size and the thickness of the silica shells increased, resulting in a blueshift of localized surface plasmon resonances (LSPR) of the Ag NPs. The corresponding specific surface areas of silica particles were 356 ± 10, 419 ± 20 and 490 ± 25 m2 g−1, and average pore diameters varied from 5.7, 5.0 to 3.3 nm according to BET and BJH analyses. TEM studies confirmed the core-shell structure, pore sizes and shapes of mesoporous shells. The dissolution tests demonstrated that the release of Ag from the powder samples is pH-sensitive and time-dependent.

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“…As such the reaction rate can be easily controlled, and it is possible to obtain a narrow nanoparticle size distribution 26 . Reverse micelle microemulsions are transparent, isotropic, and thermodynamically stable 27,28 .…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Characterization of ZnO Nanoparticles Synthesized by Microemulsion Route

Kumar

Rani

2013

ILCPA

244

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ZnO nanoparticles were synthesized by microemulsion route in W/S ratio of 5 at room temperature. X-ray diffraction (XRD) pattern reveals wurtzite structure of ZnO nanoparticles. Rod shape of ZnO nanoparticles of average particle size 10.0 to 12.0 nm were observed by transmission electron microscopy. FT-IR spectra confirmed the adsorption of surfactant molecules at the surface of ZnO nanoparticles and presence of Zn-O bonding. Thermal studies were carried out by the differential scanning calorimeter (DSC) techniques. In addition, UV-Visible spectra were employed to estimate the band gap energy of ZnO nanoparticles.

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Synthesis of Ag/SiO2 nanosize particles by reverse micelle and sol-gel processing

Cited by 16 publications

References 10 publications

Recent Developments in Environmental Photocatalytic Degradation of Organic Pollutants: The Case of Titanium Dioxide Nanoparticles—A Review

Recent Developments in Environmental Photocatalytic Degradation of Organic Pollutants: The Case of Titanium Dioxide Nanoparticles—A Review

Effect of Ethanol on Ag@Mesoporous Silica Formation by In Situ Modified Stöber Method

Structural and Optical Characterization of ZnO Nanoparticles Synthesized by Microemulsion Route

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