Effect of mechanical stirring and temperature on dynamic hydrothermal synthesis of titanate nanotubes

Sallem, Fadoua; Chassagnon, R.; Megriche, Adel; Maaoui, Mohamed El; Millot, Nadine

doi:10.1016/j.jallcom.2017.06.172

Cited by 40 publications

(30 citation statements)

References 77 publications

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“…It is worth mentioning that for several years, the preparation of TiNTs by conventional hydrothermal treatment did not require any stirring during the alkaline treatment procedure. To our knowledge, few studies have been reported in the literature with regard to the effect of agitation on the geometry of the final TiNTs …”

Section: Preparation Of Tintsmentioning

confidence: 99%

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Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Ameur

Bachir

2020

ChemistrySelect

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This paper represents a general study of titanate nanotubes (TiNTs) which are among the most important materials in the field of catalysis. This research work covers more than 100 publications about the formulation, characterisation and most recent applications of TiNTs. TiNTs can be prepared by different methods, namely the anodic deposition, sol-gel template synthesis and alkaline hydrothermal treatment. The present study focuses on the preparation of this tubular structure by alkaline treatment, using the latest and most recent processes that have been introduced in this method (stirring, acid nature, annealing temperature, etc). The surface properties, such as the point of zero charge (P.Z.C), acid-base nature and light absorption, of TiNTs are also evoked. In the end, some recent and important TiNTs applications in the field of renewable energies are reported (H 2 production and methanation). In addition, NO reduction, CO oxidation, photocatalysis and organic synthesis are also mentioned. Therefore, it may be said that this paper is a structured study about TiNTs for the purpose of making the reader aware of their importance, understand their synthesis, and know their scope of applications. To conclude, the most important data, acquired through various characterization techniques, are provided.[a] Dr.

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Section: Preparation Of Tintsmentioning

confidence: 99%

“…reported that agitation leads to self‐assembled TiNTs, and then to their conversion into longer nanowires through recrystallization. For their part, Salem et al . have recently investigated the influence of agitation on the final geometry of TiNTs.…”

Section: Preparation Of Tintsmentioning

confidence: 99%

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Ameur

Bachir

2020

ChemistrySelect

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“…TNTs can be obtained via a simple hydrothermal method first described by Kasuga et al . TNTs are used in several different applications, including uranium and palladium adsorption , CO 2 capture , and as catalysts , due to their uniform tubular morphology and high specific surface area (≈170 m 2 /g), making them suitable for tube surface modification and low toxicity . However, a drawback of TNTs is their hydrophilic nature, caused by the presence of high concentrations of hydroxyl groups at the nanotube surface, making it difficult for TNT to disperse into the polymeric matrices and thereby forming filler clusters .…”

Section: Introductionmentioning

confidence: 99%

Modified titanate nanotubes for the production of novel aliphatic polyurethane nanocomposites

et al. 2018

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Aliphatic polyurethane (PU) nanocomposites were prepared using modified titanate nanotubes (TNTs) as filler in order to improve the mechanical and thermal properties of the initial polymer. With a view to achieving greater interaction between the polymer chains and TNTs, the latter was functionalized with hexamethylene diisocyanate (H) and/or aminopropyl trimethoxysilane groups (A), producing the modified nanotubes TNTH, TNTA, or TNTHA. The thermogravimetric analyses used to quantify the amount of anchored diisocyanate or/and silanol groups in the nanotubes identified the H function as the best functional group in terms of improving the filler-PU compatibility. Transmission electron microscopy, field emission scanning electron microscopy, and atomic force microscopy analyses of the PU nanocomposites containing the three different fillers showed good TNT dispersion. The TNTHA nanotubes functionalized with both groups through the reaction between the H function already anchored on the TNTs and the A group, forming a monourea anchored group, significantly improved the mechanical and thermal properties of PU nanocomposites. POLYM. COMPOS., 40:2292-2300, 2019.

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“…[10] The thermogravimetric curves for , there are two main weight loss stages with different rates, the first stage is from 303 K to 493 K, and the second stage is above 493 K. All weight loss refers to a loss of molecules of water either by raw dehydration or by dehydroxylation. [29,30] At the first stage, the weight loss is fast, which corresponds to the escape of surface physical-absorption or free water molecules. At the second stage, the weight loss is slow, which can be attributed to the dehydroxylation that is the loss of the OH groups of the Ti-OH bond.…”

Section: Physicochemical Characterizationsmentioning

confidence: 99%

Effect of Microstructures on the Acidity and Catalytic Performance for H₂Ti₃O₇ Nanomaterials

Zhang

et al. 2020

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The effects of the microstructure of H2Ti3O7 nanomaterials on the acidity and catalytic performance were examined. Layered metal oxides H2Ti3O7, two‐dimensional H2Ti3O7 nanosheets and one‐dimensional H2Ti3O7 nanotubes were successfully synthesized. The physicochemical properties of the as‐prepared catalysts were characterized by XRD, SEM, TEM, TG, BET, LRS and Py‐FTIR. Esterification of acetic acid with n‐butanol was employed as test reaction to evaluate the catalytic performance of the as‐prepared solid acid catalysts. The results show that the microstructure is important to the catalytic activity, and the catalytic performance of the nanotubes is significantly higher than the values from nanosheets and layered H2Ti3O7. H2Ti3O7 nanotubes with multi‐walled scroll‐type open end structure possess the largest specific surface area among the as‐prepared catalysts, and it has stronger Brønsted acid strength and larger acid amount than that of nanosheets. The high catalytic activity for nanotubes may result from surface acid characteristics and confinement effect.

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Effect of mechanical stirring and temperature on dynamic hydrothermal synthesis of titanate nanotubes

Cited by 40 publications

References 77 publications

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Modified titanate nanotubes for the production of novel aliphatic polyurethane nanocomposites

Effect of Microstructures on the Acidity and Catalytic Performance for H₂Ti₃O₇ Nanomaterials

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Effect of mechanical stirring and temperature on dynamic hydrothermal synthesis of titanate nanotubes

Cited by 40 publications

References 77 publications

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Modified titanate nanotubes for the production of novel aliphatic polyurethane nanocomposites

Effect of Microstructures on the Acidity and Catalytic Performance for H2Ti3O7 Nanomaterials

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Effect of Microstructures on the Acidity and Catalytic Performance for H₂Ti₃O₇ Nanomaterials