Controlling micro-porous size in TiO2 pellets processed by sol-gel and rapid liquid phase sintering

Valdespino, D.; Rojas-George, G.; Muñoz-Saldaña, J.; Moreno-Murguia, Barbara; Cruz-Jáuregui, M.P.

doi:10.1016/j.ceramint.2019.04.154

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…About 99.8% of this nanomaterial is composed of air, so their structure is solidly porous with a network of porous materials in the form of gas packets, which makes the aerogels almost weightless. Aerogels are known to be the lightest and least dense solids, with about 50-99.5% of their volume being air [77,78,[128][129][130]. ese gels have a surface area of 250-3000 square meters per gram so that the surface of an aerogel with a volume of one cubic inch is about a football field [81].…”

Section: Aerogelsmentioning

confidence: 99%

Nanomaterial by Sol‐Gel Method: Synthesis and Application

Bokov

Jalil

Chupradit

et al. 2021

Advances in Materials Science and Engineering

620

159

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The sol-gel process is a more chemical method (wet chemical method) for the synthesis of various nanostructures, especially metal oxide nanoparticles. In this method, the molecular precursor (usually metal alkoxide) is dissolved in water or alcohol and converted to gel by heating and stirring by hydrolysis/alcoholysis. Since the gel obtained from the hydrolysis/alcoholysis process is wet or damp, it should be dried using appropriate methods depending on the desired properties and application of the gel. For example, if it is an alcoholic solution, the drying process is done by burning alcohol. After the drying stage, the produced gels are powdered and then calcined. The sol-gel method is a cost-effective method and due to the low reaction temperature there is good control over the chemical composition of the products. The sol-gel method can be used in the process of making ceramics as a molding material and can be used as an intermediate between thin films of metal oxides in various applications. The materials obtained from the sol-gel method are used in various optical, electronic, energy, surface engineering, biosensors, and pharmaceutical and separation technologies (such as chromatography). The sol-gel method is a conventional and industrial method for the synthesis of nanoparticles with different chemical composition. The basis of the sol-gel method is the production of a homogeneous sol from the precursors and its conversion into a gel. The solvent in the gel is then removed from the gel structure and the remaining gel is dried. The properties of the dried gel depend significantly on the drying method. In other words, the “removing solvent method” is selected according to the application in which the gel will be used. Dried gels in various ways are used in industries such as surface coating, building insulation, and the production of special clothing. It is worth mentioning that, by grinding the gel by special mills, it is possible to achieve nanoparticles.

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Section: Aerogelsmentioning

confidence: 99%

Nanomaterial by Sol‐Gel Method: Synthesis and Application

Bokov

Jalil

Chupradit

et al. 2021

Advances in Materials Science and Engineering

620

159

View full text Add to dashboard Cite

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The influence of calcination temperature on (photo)electrochemical property of TiO₂ prepared by the sol-gel method

Poo‐arporn

Luengprasert

Tonlublao

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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In this work, titanium dioxide (TiO2) was successfully synthesized via the sol-gel method using Titanium (IV) isopropoxide as a precursor. The mixture was heated to 115°C to obtain the solid powder of TiO2. Ti K-edge XANES measurement was performed to determine its structure. Three pre-edge peaks at energy levels between 5460-5480 eV were clearly observed. These features correlated to 1s→d electronic transition in the distorted-octahedral structure of anatase TiO2. The in situ XANES experiment at 700°C revealed no phase transformation from anatase to rutile. There was no characteristic of the rutile phase on the XRD pattern of TiO2 calcined at 700°C. This result confirmed the stability of anatase. SEM images revealed the circular shape of TiO2 particles with a diameter of around 50 nm. The highest (photo)electrochemical activity of TiO2 was obtained at the calcination temperature of 300°C as investigated by a cyclic voltammetry.

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Advances in Fabrication Techniques for Hybrid Nanomaterials

Kaur,

Bhullar

2024

Innovations and Applications of Hybrid Nanomaterials

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This chapter summarises the pioneering milestone techniques in hybrid nanomaterials fabrication for various purposes and recent trends towards future manufacturing platforms. Fabrication techniques for hybrid nanomaterials involve combining two or more distinct types of nanoscale components, such as nanoparticles, nanowires, nanosheets, and nanotubes, to create materials with enhanced or tailored properties. These techniques aim to take advantage of the unique characteristics of each component to create synergistic effects. Hybrid nanomaterials find applications in various fields, including electronics, catalysis, energy storage, and biomedicine. An overview of hybrid nanomaterial fabrication techniques that have emerged as promising approaches to design and synthesize novel materials with enhanced functionalities is presented in this chapter. The techniques discussed encompass both top-down and bottom-up methods, enabling precise control over the composition, structure, and properties of the resulting hybrid nanomaterials.

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Controlling micro-porous size in TiO2 pellets processed by sol-gel and rapid liquid phase sintering

Cited by 3 publications

References 12 publications

Nanomaterial by Sol‐Gel Method: Synthesis and Application

Nanomaterial by Sol‐Gel Method: Synthesis and Application

The influence of calcination temperature on (photo)electrochemical property of TiO₂ prepared by the sol-gel method

Advances in Fabrication Techniques for Hybrid Nanomaterials

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Controlling micro-porous size in TiO2 pellets processed by sol-gel and rapid liquid phase sintering

Cited by 3 publications

References 12 publications

Nanomaterial by Sol‐Gel Method: Synthesis and Application

Nanomaterial by Sol‐Gel Method: Synthesis and Application

The influence of calcination temperature on (photo)electrochemical property of TiO2 prepared by the sol-gel method

Advances in Fabrication Techniques for Hybrid Nanomaterials

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The influence of calcination temperature on (photo)electrochemical property of TiO₂ prepared by the sol-gel method