Recent Advances in Applications of Ceramic Nanofibers

Mapping Intimacies ◽

10.5772/intechopen.97118 ◽

2021 ◽

Author(s):

Nuray Kizildag

Keyword(s):

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Ceramic Materials ◽

Water Remediation ◽

Mechanical And Thermal Properties ◽

Chemical Erosion ◽

Recent Advances ◽

Wide Range ◽

Ceramic Nanofibers

Ceramic materials are well known for their hardness, inertness, superior mechanical and thermal properties, resistance against chemical erosion and corrosion. Ceramic nanofibers were first manufactured through a combination of electrospinning with sol–gel method in 2002. The electrospun ceramic nanofibers display unprecedented properties such as high surface area, length, thermo-mechanical properties, and hierarchically porous structure which make them candidates for a wide range of applications such as tissue engineering, sensors, water remediation, energy storage, electromagnetic shielding, thermal insulation materials, etc. This chapter focuses on the most recent advances in the applications of ceramic nanofibers.

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The Ceramist as Chemist - Opportunities for New Materials

MRS Proceedings ◽

10.1557/proc-32-59 ◽

1984 ◽

Vol 32 ◽

Cited By ~ 12

Author(s):

D. R. Uhlmann ◽

B.J.J. Zelinski ◽

G.E. Wnek

Keyword(s):

Wide Spectrum ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Glass Ceramics ◽

Chemical Properties ◽

Ceramic Materials ◽

Process Technology ◽

Chemical Homogeneity ◽

And Chemical Properties

ABSTRACTThe use of sol-gel techniques to prepare glasses and crystalline ceramics offers outstanding opportunity for breakthroughs in technology. The areas of particular promise include novel glasses; crystallineceramics with exceptional microstructures; coatings for modification of electrical, optical, mechanical and chemical properties; porous media with high surface area and tailored chemistry; ceramic powders with high chemical homogeneity and narrow distributions of particle size; matrix materials in ceramicceramic composites; and a wide spectrum of specialty ceramic materials, ranging from abrasives and fibers to glass ceramics and films. Opportunities in each of these areas will be discussed and related to the advances in understanding and process technology required for their achievement. The theses will be advanced that creative chemistry provides the key to many of these advances, that ceramists simply MUST learn more chemistry, but that we dare not rest from our labors when the chemistry is done.

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Low-Cost Preparation of SBA-15 Silica Molecular Sieve and High Humidity Sensing Property in a Wide Range of Relative Humidity

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.1455 ◽

2016 ◽

Vol 852 ◽

pp. 1455-1462

Author(s):

Jie Zhang ◽

Yong Heng Zhu ◽

Shi Zao Kang ◽

Xiang Qing Li ◽

Jia Qiang Xu

Keyword(s):

Relative Humidity ◽

Molecular Sieves ◽

Low Cost ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Nitrogen Adsorption ◽

Fast Response ◽

Humidity Sensing ◽

Wide Range

In this paper, different SBA-15 molecular sieves were prepared in a facile sol-gel method by using a low-cost sodium silicate as silicon source at different ripening temperature. The materials were characterized by small-angle XRD, TEM, nitrogen adsorption–desorption test. The results showed that ripening temperature can affect the pore size and mesostructure of SBA-15. High surface area SBA-15 can be obtained at low ripening temperature, and plugged mesostructure can be prepared at high temperature. The gravimetric humidity sensing property of the materials were tested based on a transducer of quartz crystal microbalance. The test results revealed that all the samples showed high response in the wide range of relative humidity. The sensors based on that prepared at 35°C show a good stability and linearity in the range of 11.3%RH to 98%RRH along with fast response (12s) and recovery time (8s), ultrahigh sensitivity and low hysteresis, implying that has a great potential for humidity detection.

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High-Surface-Area Alumina-Silica Nanocatalysts Prepared by a Hybrid Sol-Gel Route Using a Boehmite Precursor

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2010.03997.x ◽

2010 ◽

Vol 93 (12) ◽

pp. 4047-4052 ◽

Cited By ~ 6

Author(s):

Padmaja Parameswaran Nampi ◽

Padmanabhan Moothetty ◽

Wilfried Wunderlich ◽

Frank John Berry ◽

Michael Mortimer ◽

...

Keyword(s):

Surface Area ◽

High Surface ◽

Sol Gel ◽

High Surface Area

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Synthesis and structural characteristics of high surface area TiO2 aerogels by ultrasonic-assisted sol–gel method

Nanotechnology ◽

10.1088/1361-6528/aaa1d1 ◽

2018 ◽

Vol 29 (7) ◽

pp. 075702 ◽

Cited By ~ 6

Author(s):

Feng Qingge ◽

Cai Huidong ◽

Lin Haiying ◽

Qin Siying ◽

Liu Zheng ◽

...

Keyword(s):

Surface Area ◽

Structural Characteristics ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Gel Method ◽

Sol Gel Method ◽

Ultrasonic Assisted

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Texture Evaluation of Sol-Gel Derived Mesoporous Bioactive Glass

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.230 ◽

2013 ◽

Vol 284-287 ◽

pp. 230-234

Author(s):

Yu Jen Chou ◽

Chi Jen Shih ◽

Shao Ju Shih

Keyword(s):

Surface Area ◽

Calcination Temperature ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Nitrogen Adsorption ◽

Bioactive Glasses ◽

Transmission Electron ◽

Sol Gel Process ◽

Adsorption Desorption

Recent years mesoporous bioactive glasses (MBGs) have become important biomaterials because of their high surface area and the superior bioactivity. Various studies have reported that when MBGs implanted in a human body, hydroxyl apatite layers, constituting the main inorganic components of human bones, will form on the MBG surfaces to increase the bioactivity. Therefore, MBGs have been widely applied in the fields of tissue regeneration and drug delivery. The sol-gel process has replaced the conventional glasses process for MBG synthesis because of the advantages of low contamination, chemical flexibility and lower calcination temperature. In the sol-gel process, several types of surfactants were mixed with MBG precursor solutions to generate micelle structures. Afterwards, these micelles decompose to form porous structures after calcination. Although calcination is significant for contamination, crystalline and surface area in MBG, to the best of the authors’ knowledge, only few systematic studies related to calcination were reported. This study correlated the calcination parameters and the microstructure of MBGs. Microstructure evaluation was characterized by transmission electron microscopy and nitrogen adsorption/desorption. The experimental results show that the surface area and the pore size of MBGs decreased with the increasing of the calcination temperature, and decreased dramatically at 800°C due to the formation of crystalline phases.

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Understanding Micro-Droplet Interface Bilayers for Developing Bioinspired Sensors

Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting ◽

10.1115/smasis2013-3134 ◽

2013 ◽

Author(s):

Guru Venkatesan ◽

Andy Sarles

Keyword(s):

Water Droplet ◽

Morphological Changes ◽

High Surface ◽

High Surface Area ◽

Material System ◽

Modes Of Operation ◽

New Class ◽

Wide Range ◽

Droplet Sizes ◽

The Stability

Droplet-based biomolecular arrays form the basis for a new class of bioinspired material system, whereby decreasing the sizes of the droplets and increasing the number of droplets can lead to higher functional density for the array. In this paper, we report on a non-microfluidic approach to form and connect nanoliter-to-femtoliter, lipid-coated aqueous droplets in oil to form micro-droplet interface bilayers (μDIBs). Two different modes of operation are reported for dispensing a wide range of droplet sizes (2–200μm radius). Due to the high surface-area-to-volume ratios of microdroplets at these length scales, droplet shrinking is prominent, which affects the stability and lifetime of the bilayer. To better quantify these effects, we measure the shrinkage rates for 8 different water droplet/oil compositions and study the effect of lipid placement and lipid type on morphological changes to μDIBs.

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Aqueous colloidal sol–gel route to synthesize nanosized ceria-doped titania having high surface area and increased anatase phase stability

Journal of Sol-Gel Science and Technology ◽

10.1007/s10971-007-1583-1 ◽

2007 ◽

Vol 43 (3) ◽

pp. 299-304 ◽

Cited By ~ 38

Author(s):

Pradeepan Periyat ◽

K. V. Baiju ◽

P. Mukundan ◽

P. Krishna Pillai ◽

K. G. K. Warrier

Keyword(s):

Surface Area ◽

Phase Stability ◽

Anatase Phase ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Doped Titania

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Enhancement of Photocatalytic Oxidation of Glucose to Value-Added Chemicals on TiO2 Photocatalysts by A Zeolite (Type Y) Support and Metal Loading

Catalysts ◽

10.3390/catal10040423 ◽

2020 ◽

Vol 10 (4) ◽

pp. 423 ◽

Cited By ~ 2

Author(s):

Kamonchanok Roongraung ◽

Surawut Chuangchote ◽

Navadol Laosiripojana

Keyword(s):

Formic Acid ◽

Surface Area ◽

Gluconic Acid ◽

Photocatalytic Oxidation ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Value Added ◽

Incipient Wetness Impregnation ◽

Microwave Assisted

TiO2-based photocatalysts synthesized by the microwave-assisted sol-gel method was tested in the photocatalytic glucose conversion. Modifications of TiO2 with type-Y zeolite (ZeY) and metals (Ag, Cu, and Ag-Cu) were developed for increasing the dispersion of TiO2 nanoparticles and increasing the photocatalytic activity. Effects of the TiO2 dosage to zeolite ratio (i.e., TiO2/ZeY of 10, 20, 40, and 50 mol %) and the silica to alumina ratio in ZeY (i.e., SiO2:Al2O3 of 10, 100, and 500) were firstly studied. It was found that the specific surface area of TiO2/ZeY was 400–590 m2g−1, which was higher than that of pristine TiO2 (34.38 m2g−1). The good properties of 20%TiO2/ZeY photocatalyst, including smaller particles (13.27 nm) and high surface area, could achieve the highest photocatalytic glucose conversion (75%). Yields of gluconic acid, arabinose, xylitol, and formic acid obtained from 20%TiO2/ZeY were 9%, 26%, 4%, and 35%, respectively. For the effect of the silica to alumina ratio, the highest glucose conversion was obtained from SiO2:Al2O3 ratio of 100. Interestingly, it was found that the SiO2:Al2O3 ratio affected the selectivity of carboxylic products (gluconic acid and formic acid). At a low ratio of silica to alumina (SiO2:Al2O3 = 10), higher selectivity of the carboxylic products (gluconic acid = 29% and formic acid = 32%) was obtained (compared with other higher ratios). TiO2/ZeY was further loaded by metals using the microwave-assisted incipient wetness impregnation technique. The highest glucose conversion of 96.9 % was obtained from 1 wt. % Ag-TiO2 (40%)/ZeY. Furthermore, the bimetallic Ag-Cu-loaded TiO2/ZeY presented the highest xylitol yield of 12.93%.

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