Formation of monolithic silica gel microhoneycombs (SMHs) using pseudosteady state growth of microstructural ice crystals

Mukai, Shin R.; Nishihara, Hirotomo; Tamon, Hajime

doi:10.1039/b316597c

Cited by 179 publications

(158 citation statements)

References 14 publications

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“…The RGO-I monolith has a local unidirectional structure and the colonies of locally aligned region are observed, which is in the parallel directions of the ice front. This structure is similar to the previously reported materials which prepared by ice freezing method [16][17][18]. However, no ordered structure can be observed in the region within the colonies.…”

Section: Co 2 Activation Methodssupporting

confidence: 75%

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Activation routes for high surface area graphene monoliths from graphene oxide colloids

Wang

Tristan

Minami

et al. 2014

Carbon

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Activation routes for high surface-area graphene monoliths from graphene oxide colloids, Carbon (2014), doi: http://dx.doi.org/10.1016/j.carbon. 2014.04.071 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. . The mechanism of the porosity development by KOH activation method is proposed.This work provides a promising route for the bottom-up design of pore width-tunable nanoporous carbons.

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Section: Co 2 Activation Methodssupporting

confidence: 75%

“…The GO monoliths were produced with unidirectional freeze drying method used for production of other materials [16][17][18][19][20]. The obtained monoliths were heated up to 573 K at a rate of 1.5 K min -1 and then the reduced GO (RGO) monoliths were obtained.…”

Section: Preparation Of Highly Porous Reduced Go Monolithsmentioning

confidence: 99%

Activation routes for high surface area graphene monoliths from graphene oxide colloids

Wang

Tristan

Minami

et al. 2014

Carbon

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“…Silica was selected as the model substance to confirm the applicability of unidirectional freezing to soft hydrogels and hydrosols [19,20]. Silica can be prepared through a wide variety of methods using various sources.…”

Section: Ice Templating Methodsmentioning

confidence: 99%

“…By widening the range of application, gels in forms other than polygonal fibers can be expected. Based on this concept, the " ice templating"method was developed [19][20][21][22][23][24][25]. This paper will first describe the outline of this new method and next, the details about methods to c o n t r o l μ m s c a l e d i me n s i o n s ( f i b e r d i a me t e r a n d mi c r o h o n e y c o mb c h a n n e l s i z e ) a n d n m s c a l e d i me n s i o n s (micropore and mesopore size) of the materials obtained through it.…”

mentioning

confidence: 99%

Porous microfibers and microhoneycombs synthesized by ice templating

Mukai

Nishihara

Tamon³

2006

Catal Surv Asia

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R e c e n t l y we i n t r o d u c e d t h e " i c e t e mp l a t i n g " me t h o d , a new method which allows the synthesis of nanoporous materials with unique morphology, such as microfibers and microhoneycombs. In this method, materials are synthesized by freezing their parent hydrosols or hydrogels unidirectionally. Ice crystals which grow within the precursor during freezing act as the template. Therefore, the template can be easily removed through simple thawing and drying, which is a unique and beneficial feature of this method. This paper will first describe the outline of this new method and next, the details about methods to control the dimensions of the materials obtained through it. Comments about the range of applicability of this method will also be provided.

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“…Many approaches have been developed to obtain ceramic materials with a hierarchical porosity 1 , such as extrusion 2 or ice templating 3 . They typically involve the presence of a macro-or mesopore former that is removed by a heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Crystal Templating with Mutually Miscible Solvents: A Simple Path to Hierarchical Porosity

2014

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Abstract:Ice templating, a route where ice crystals are used to template macroporosity, has been used to process a variety of materials with one level of macropores. We demonstrate here a variant of ice templating based on the solidification of mutually miscible solvents. The solidification of different phases, each defined by their own size and morphology, provides a simple one-step processing route for materials with hierarchical porosity defined by up to three levels of macroporosity. These concepts are demonstrated with both ceramic (yttria-stabilized zirconia) and polymer (polyvinyl alcohol) materials.

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Formation of monolithic silica gel microhoneycombs (SMHs) using pseudosteady state growth of microstructural ice crystals

Cited by 179 publications

References 14 publications

Activation routes for high surface area graphene monoliths from graphene oxide colloids

Activation routes for high surface area graphene monoliths from graphene oxide colloids

Porous microfibers and microhoneycombs synthesized by ice templating

Crystal Templating with Mutually Miscible Solvents: A Simple Path to Hierarchical Porosity

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