Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

Ikari, Kenichi; Suzuki, Keisei; Imai, Hiroaki

doi:10.1021/la0525527

Cited by 84 publications

(86 citation statements)

References 21 publications

(34 reference statements)

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“…al. used binary surfactants method, to control the particle size of silica on the nanometer scale, in which by inhibiting the particle's growth with a nonionic amphiphilic agent, silica nanoparticles with hexagonally arrayed mesopores were produced [6]. Mollar and coworker synthesized nanometer-sized mesoporous silica particles by addition of triethanolamine as the base and cationic surfactant as the template [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Silica Nanoparticles and its Beneficial Role in Cementitious Materials

Singh

Agarwal

Bhattacharyya

et al. 2011

Nanomaterials and Nanotechnology

116

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Spherical silica nanoparticles (n-SiO2) with controllable size have been synthesized using tetraethoxysilane as starting material and ethanol as solvent by sol-gel method. Morphology and size of the particles was controlled through surfactants. Sorbitan monolaurate, sorbitain monopalmitate and sorbitain monostearate produced silica nanoparticles of varying sizes (80-150 nm), indicating the effect of chain length of the surfactant. Increase in chain length of non-ionic surfactant resulted in decreasing particle size of silica nanoparticles. Further, the size of silica particles was also controlled using NH3 as base catalyst. These silica nanoparticles were incorporated into cement paste and their role in accelerating the cementitious reactions was investigated. Addition of silica nanoparticles into cement paste improved the microstructure of the paste and calcium leaching is significantly reduced as n-SiO2 reacts with calcium hydroxide and form additional calciumsilicate-hydrate (C-S-H) gel. It was found that calcium hydroxide content in silica nanoparticles incorporated cement paste reduced ~89% at 1 day and up to ~60% at 28 days of hydration process. Synthesized silica particles and cement paste samples were characterized using scanning electron microscopy (SEM), powder X-ray diffraction (XRD), infrared spectroscopy (IR) and thermogravimetric analysis (TGA).

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Section: Introductionmentioning

confidence: 99%

Preparation of Silica Nanoparticles and its Beneficial Role in Cementitious Materials

Singh

Agarwal

Bhattacharyya

et al. 2011

Nanomaterials and Nanotechnology

116

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“…Imai et al prepared mesostructured silica nanoparticles by using binary surfactants composed of a cationic surfactant as a template and a non-ionic triblock copolymer as a particle growth inhibitor (Figure 3). 27,30 Furthermore, Wiesner et al succeeded in preparing the smallest mesostructured silica nanoparticles with only one pore in each particle by using a poly(ethylene glycol) (PEG)-modified silane as a strong growth inhibitor. 46 Such capping agents tend to act not only as inhibitors of particle growth but also as dispersants to increase the colloidal stability of nanoparticles.…”

Section: Majormentioning

confidence: 99%

“…32,34 Imai et al prepared mesostructured silica nanoparticles in a binary surfactant system with a high silicate concentration, though a white gel was formed, which would indicate that the nanoparticles were partially aggregated. 27,30 In order to obtain colloidal mesostructured silica nanoparticles dispersed as primary nanoparticles, using dilute conditions would also be important. In fact, some papers have reported successful preparation of colloidal mesostructured silica nanoparticles that were dispersed as primary nanoparticles by using capping agents under dilute silicate conditions.…”

Section: Major Factors For Preparation Ofmentioning

confidence: 99%

Colloidal Mesoporous Silica Nanoparticles

Yamamoto

Kuroda

2016

Bulletin of the Chemical Society of Japan

197

100

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IMMA. His current research interests include mesostructured materials, and several fields of inorganic materials chemistry. Some examples are intercalation chemistry, silicate chemistry, inorganic polymers, sol-gel chemistry, inorganic-organic hybrids, and self-organized materials. AbstractMesoporous silica nanoparticles (MSNs) with colloidal stability have attracted increasing interest because of their important properties, such as high transparency and cell uptake. Colloidal MSNs are comprehensively reviewed from the viewpoints of their preparation, characterization, and applications which include biomedical, catalytic, and optical materials. The following two points have been emphasized. The first point is that this review covers the widest range of introduction and discussion of the preparation and applications of both colloidal and noncolloidal MSNs. The second point is that this account contains a discussion from the viewpoints of both inorganic and colloid chemistries. After the introduction of the historical background of preparation of MSNs, preparative methods of colloidal MSNs and the major factors for the preparation of nanosized and colloidal MSNs are discussed. The methods to control the size, composition, morphology, and pore size of MSNs are also presented. Appropriate methods to obtain MSNs with high colloidal dispersibility are also discussed. Applications of colloidal MSNs are introduced with an emphasis on the colloidal stability. Issues to be addressed for further developments of colloidal MSNs are finally described.

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“…However, the industrial-scale synthesis of monodispersed and microporous silica particles with diameters in this range remains difficult. Such silica particles are usually prepared with highly diluted solutions, resulting in inefficient processing [6,7,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Recently, we have reported the industrialscale synthesis of monodispersed microporous silica particles of ca.…”

Section: Introductionmentioning

confidence: 99%

Large-scale preparation of morphology-controlled microporous silica particles via gradual injection of reactants with different surfactants

Shimogaki

Tokoro

Tabuchi

et al. 2016

J Sol-Gel Sci Technol

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Microporous silica particles that are monodispersed and have submicrometer diameters are attracting much attention in many applications, including medicine, environmental technology, cosmetics, and electronics. However, the production of microporous silica particles on an industrial scale comes with some difficulties. We have recently reported that the efficient synthesis of monodisperse and microporous silica particles can be achieved by the gradual injection of reactants into the reaction system. In the present study, we examined the effect of template molecules on the particle morphology via the gradual injection of reactants method. The use of the primary amines is mandatory to obtain the microporous silica particles. Furthermore, the solubility of amines in the reaction solution plays a critical role in the synthesis of monodispersed and microporous silica particles of 100 nm in diameter. Monodisperse silica particles 100 nm in diameter and with a specific surface area of 500 m 2 /g could be obtained with decylamine as a surfactant. The results indicate that the present synthetic approach is useful for efficient and large-scale production of monodisperse and microporous silica particles with the designated surface area.Graphical Abstract Microporous silica particles of 100 nm in diameter can be prepared in an industrial scale by the gradual injection of reagent approach. Good dispersibility of particle diameter and effective production can be achieved at the same time.

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Structural Control of Mesoporous Silica Nanoparticles in a Binary Surfactant System

Cited by 84 publications

References 21 publications

Preparation of Silica Nanoparticles and its Beneficial Role in Cementitious Materials

Preparation of Silica Nanoparticles and its Beneficial Role in Cementitious Materials

Colloidal Mesoporous Silica Nanoparticles

Large-scale preparation of morphology-controlled microporous silica particles via gradual injection of reactants with different surfactants

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