Template synthesis of titania on polysaccharides

Postnova, I. V.; Krekoten, A. V.; Kozlova, Ekaterina A.; Tsybulya, S. V.; Rempel, А. А.; Shchipunov, Yu. A.

doi:10.1007/s11172-013-0127-9

Cited by 8 publications

(9 citation statements)

References 26 publications

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“…Banfield et al found an increase in the stability of anatase, which was larger than that of rutile, as soon as the size of the nanocrystallites decreased than 11 nm . This increase explains its preferential formation when titania of this size is synthesized on cellulose fibers . Anatase possesses also a larger surface area and photocatalytic activity than rutile .…”

Section: Metal Oxidesmentioning

confidence: 99%

“…This alternative to sol–gel synthesis was developed to regulate the mineralization processes with metal alkoxides of titania, alumina, zirconia, vanadium oxide, and others . The reason is that the hydrolysis and condensation reactions, although they are the same as for silicon alkoxides (Figure A), are too fast .…”

Section: Coatingmentioning

confidence: 99%

“…Metal oxides are generated instantly as soon as their precursor comes in contact with water. This property was used first to direct their formation on soluble polysaccharide macromolecules . Thereupon the method was extended into cellulose with the high hygroscopicity, to which it is very appropriate to direct the mineralization.…”

Section: Coatingmentioning

confidence: 99%

“…Syntheses were conducted initially in biocompatible ethylene glycol by adding very restricted amount of H 2 O . This water was mainly absorbed by cellulosic fibrils.…”

Section: Coatingmentioning

confidence: 99%

“…In addition, titania coated fibrils (Figure E) transformed from amorphous into crystalline state during this treatment (Figure F). It was mentioned that cellulose promoted an anatase formation at low temperatures . Another benefit includes a significant decrease (up to 50%) of density carbonized cellulose and an increase in the fire retardancy .…”

Section: Applicationsmentioning

confidence: 99%

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Cellulose Mineralization as a Route for Novel Functional Materials

Shchipunov

Postnova

2018

Adv Funct Materials

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Cellulose possesses excellent properties, but its performance characteristics do not satisfy human requirements completely, which has soured a constant effort to improve its features. Currently, cellulose is combined with inorganics in a process called mineralization that results in a novel type of materials referred to as bio-nanocomposites. There are many examples of mineralized tissues with superior properties in living nature. This circumstance gives us a reason to biomimic them by compounding biopolymers with inorganics. Here, the main mineralization techniques, properties, structure, functionality, and application of mineralized cellulose are the focus. Cellulose can be combined with inorganics through the vapor phase or by the methods of wet chemistry. Much attention has been paid to sol-gel chemistry, which is of first importance in cellulose mineralization. Inorganics can protect polysaccharides, regulate hydrophilicity-hydrophobicity, and impart self-cleaning, antimicrobial and conducting properties, which not only improves them but results in bio-nanocomposites with novel functionalities and performance, not known before for cellulosic materials. Further calcination and carbonization of mineralized cellulose under mild conditions give nanosized metals, metal oxides, and their nanocomposites with carbon, which are often unavailable by conventional methods. Therefore, mineralization is used to develop innovative textiles, oil absorbent and oil/water separating membranes, catalysts and photocatalysts, solar cells, conductors, supercapacitors, transistors and batteries for flexible electronics, and energy storage devices. These nontraditional and highly promising areas for applications have caused an intense interest in cellulose that resembles its rediscovery.

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Section: Metal Oxidesmentioning

confidence: 99%

Section: Coatingmentioning

confidence: 99%

Section: Coatingmentioning

confidence: 99%

“…Syntheses were conducted initially in biocompatible ethylene glycol by adding very restricted amount of H 2 O . This water was mainly absorbed by cellulosic fibrils.…”

Section: Coatingmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

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