Sol–gel synthesis and characterization of titania monolith with bimodal porosity

Zhao, Jing; Jiang, Zi‐Tao; Tan, Jin; Li, Rong

doi:10.1007/s10971-011-2410-2

Cited by 9 publications

(2 citation statements)

References 20 publications

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“…The synthetic approaches described in Table 1 not only result in the different polymorphs, but also in various morphologies, such as (nano)particles, films, nanotubes, nanowires, nanoribbons, 61,62 or even monolithic systems. 63,64 As mentioned above, for many applications the accessible interface plays an important role, and synthetic approaches resulting in high surface area or porous, but crystalline materials become increasingly more relevant. In recent years different protocols have been developed resulting in nanoscale or porous materials exhibiting specific surface areas up to 200 m 2 g -1 for a crystalline anatase material.…”

Section: Synthesis Routes To Titanium Dioxide Nanostructuresmentioning

confidence: 99%

High surface area crystalline titanium dioxide: potential and limits in electrochemical energy storage and catalysis

et al. 2012

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Titanium dioxide is one of the most intensely studied oxides due to its interesting electrochemical and photocatalytic properties and it is widely applied, for example in photocatalysis, electrochemical energy storage, in white pigments, as support in catalysis, etc. Common synthesis methods of titanium dioxide typically require a high temperature step to crystallize the amorphous material into one of the polymorphs of titania, e.g. anatase, brookite and rutile, thus resulting in larger particles and mostly non-porous materials. Only recently, low temperature solution-based protocols gave access to crystalline titania with higher degree of control over the formed polymorph and its intra- or interparticle porosity. The present work critically reviews the formation of crystalline nanoscale titania particles via solution-based approaches without thermal treatment, with special focus on the resulting polymorphs, crystal morphology, surface area, and particle dimensions. Special emphasis is given to sol-gel processes via glycolated precursor molecules as well as the miniemulsion technique. The functional properties of these materials and the differences to chemically identical, non-porous materials are illustrated using heterogeneous catalysis and electrochemical energy storage (battery materials) as example.

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Section: Synthesis Routes To Titanium Dioxide Nanostructuresmentioning

confidence: 99%

High surface area crystalline titanium dioxide: potential and limits in electrochemical energy storage and catalysis

et al. 2012

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“…It was possible because large amount of HCl led to the more complete condensation of Ti-OH on the surface that tended to form a finer network and hence, resulting in a larger surface area. [20,21] In addition, when the amount of H 2 O was in some extension, the more H 2 O was in the initiative solution, and the easier was the chelating ligand (HAc) replaced by hydroxyl. As a result, the trend to form the network polymers was enhanced, and the micrometer scale polymers would become smaller, and, therefore, the specific surface area would increase correspondingly.…”

Section: Porous Structurementioning

confidence: 99%

Sol-Gel Synthesis and Characterization of Macro-Mesoporous Titania Monolith and Its Application in Chromatographic Separation of Carboxylates

Wang

Jiang

et al. 2013

Journal of Liquid Chromatography & Related Technologies

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& Monolithic titania materials with macro-mesoporous skeleton were prepared through a template-free sol-gel synthesis route, based on the reaction of hydrolysis and polycondensation of titanium isopropoxide. Acetic acid (HAc), hydrochloric acid (HCl), and redistilled H 2 O were utilized as the starting reagents, without the addition of otherwise commonly used chemical modifier such as poly(ethylene oxide) and formamide. The synthesis method applied herein was economical and convenient, which allowed synthesizing titania monolith with bimodal macro-mesoporosity directly. The titania monolith with more than 10 cm in length, possessed a specific surface area of 88 m 2 =g (calcined at 350 C), a narrow pore size distribution, an anatase crystallite structure and great mechanical strength, and the porosity texture could be controlled by adjusting the starting composition. Using synthesized titania monolith as HPLC stationary phase, the mixture of carboxylates was successfully separated.

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Hierarchical Organization in Monolithic Sol–Gel Materials

Feinle

Elsaesser

Hüsing

2016

Handbook of Sol-Gel Science and Technology

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Sol–gel synthesis and characterization of titania monolith with bimodal porosity

Cited by 9 publications

References 20 publications

High surface area crystalline titanium dioxide: potential and limits in electrochemical energy storage and catalysis

High surface area crystalline titanium dioxide: potential and limits in electrochemical energy storage and catalysis

Sol-Gel Synthesis and Characterization of Macro-Mesoporous Titania Monolith and Its Application in Chromatographic Separation of Carboxylates

Hierarchical Organization in Monolithic Sol–Gel Materials

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