Effects of the concentrations of precursor and catalyst on the formation of monodisperse silica particles in sol–gel reaction

Oh, Chul; Shim, Seung‐Bo; Lee, Yong-Geun; Oh, Seong‐Geun

doi:10.1016/j.materresbull.2011.06.044

Cited by 29 publications

(22 citation statements)

References 10 publications

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“…1(c), the further decrease in the size of silica from 135 nm to 115 nm could be accomplished with a decrease in the amount of TEOS from 1.0 g to 0.5 g. As the concentration of TEOS as a precursor was decreased, the size of silica particles was also decreased. This tendency is in a good agreement with the other researches [33,34].…”

Section: Effect Of the Added Amount Of Teossupporting

confidence: 93%

Formation of manganese oxide shells on silica spheres with various crystal structures using surfactants for the degradation of methylene blue dye

Park

Jang

Kwon

et al. 2013

Materials Research Bulletin

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Section: Effect Of the Added Amount Of Teossupporting

confidence: 93%

Formation of manganese oxide shells on silica spheres with various crystal structures using surfactants for the degradation of methylene blue dye

Park

Jang

Kwon

et al. 2013

Materials Research Bulletin

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“…The surface areas ranged between 250 m 2 g −1 and 350 m 2 g −1 , and were relatively high when compared to other spherical particles prepared through sol-gel method [21]. When l-GlyGly was used as a template instead of GlyGly no significant differences in the surface area were found.…”

Section: Pore Propertiesmentioning

confidence: 83%

Synthesis of glycylglycine-imprinted silica microspheres through different water-in-oil emulsion techniques

Ornelas

Loureiro

Araújo

et al. 2013

Journal of Chromatography A

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“…The Fourier-transform infrared (FT-IR) spectra ( Figure S6a, Supporting Information) present characteristic peaks ascribed to the F-silica. [ 29,30 ] Two separated peaks (1000 and 1150 cm −1 ) indicate that symmetry of Si O Si bonds, which is observed in pure silica particles, is partially destroyed by the formation of Si C bonds in the F-silica. In addition, a characteristic peak at 2580 cm −1 corresponding to thiol groups was observed at the F-silica.…”

Section: Doi: 101002/aenm201500954mentioning

confidence: 98%

“…Here, thiol ( SH)-functionalized silica (denoted as "F-silica") particles were synthesized by sol-gel process using 3-mercaptopropyl trimethoxysilane (MPTMS) as a precursor. [ 29 ] The synthetic scheme of the F-silica is described in the Experimental Section ( Figure S5, Supporting Information). Thiol groups are known to effectively react with heavy metal ions through their lone pair electronsmediated coordination bonds, eventually yielding metal-thiol complexes.…”

Section: Doi: 101002/aenm201500954mentioning

confidence: 99%

Superlattice Crystals–Mimic, Flexible/Functional Ceramic Membranes: Beyond Polymeric Battery Separators

Kim

et al. 2015

Advanced Energy Materials

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structural integrity upon mechanical deformation. In addition, thickness reduction is another challenging issue in the development of ceramic membranes. For these reasons, no meaningful results have been reported with ceramic membranes for battery separator applications.Among numerous architectural innovations of advanced materials, superlattice crystals, which are characterized with highly ordered/close-packed particle arrays, have been extensively investigated as a compelling building template in a wide variety of application fi elds such as photonic crystals, catalysts, electrodes, and sensors. [16][17][18] From the viewpoint of battery separator requirements, the close-packed particle arrays of superlattice crystals are expected to offer exceptional benefi ts for the thermal stability, dimensional rigidity and, more notably, porous structure (i.e., interstitial voids formed between the particles), although they are mechanically fragile upon external deformation stress.Considering again the key role [7][8][9] of battery separators as ion-conducting channels between electrodes, functional separators bearing chemical traps (that can capture unwanted heavy metal ions dissolved in liquid electrolyte) are expected to provide benefi cial effects on cell performance. For example, spinel lithium manganese oxide (LiMn 2 O 4 , LMO) materials, [ 19,20 ] which are widely used in large-scale batteries for applications in EVs and ESSs, are struggling with dissolution of Mn 2+ ions at elevated temperatures. The Mn 2+ dissolution-triggered disruption/contamination of electrodes are known to provoke capacity fading during charge/discharge cycling. Most of previous studies on this issue have been devoted to synthesis/ engineering of cathode materials, functional binders, and electrolytes. [21][22][23][24] Unfortunately, very few works, [ 25,26 ] which were simply focused on the surface modifi cation of polyethylene (PE) separators, were reported with battery separators.Here, intrigued by the abovementioned structural novelty/ potential benefi ts of ceramic membranes/superlattice crystals and also spurred by the urgent demand for chemical traps of heavy metal ions, we demonstrate a new class of ultimate battery separator based on fl exible/functional porous ceramic membranes (referred to as "2F ceramic separators") for highperformance lithium-ion batteries. The 2F ceramic separators are comprised of densely packed ceramic particles spatially besieged by electrospun nanofi ber skeleton. Both the ceramic particles and nanofi bers are rationally designed and synthesized to possess well-developed porous structure and also chemical functionality (as a new concept of chemical trap for chelating unwanted heavy metal ions dissolved in electrolytes). The compactly packed ceramic particles in the 2F separators, similar to the superlattice crystals, offer exceptional thermal stability/ dimensional rigidity and allow the formation of 3D-reticulated interstitial voids (that will be fi lled with liquid electrolyte). The

show abstract

Effects of the concentrations of precursor and catalyst on the formation of monodisperse silica particles in sol–gel reaction

Cited by 29 publications

References 10 publications

Formation of manganese oxide shells on silica spheres with various crystal structures using surfactants for the degradation of methylene blue dye

Formation of manganese oxide shells on silica spheres with various crystal structures using surfactants for the degradation of methylene blue dye

Synthesis of glycylglycine-imprinted silica microspheres through different water-in-oil emulsion techniques

Superlattice Crystals–Mimic, Flexible/Functional Ceramic Membranes: Beyond Polymeric Battery Separators

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