H2Ti3O7 titanate nanotubes for highly effective adsorption of basic fuchsin dye for water purification

Hinojosa-Reyes, Mariana; Camposeco-Solís, Roberto; Ruíz, Facundo

doi:10.1016/j.micromeso.2018.09.035

Cited by 43 publications

(22 citation statements)

References 37 publications

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“…Sodium hydroxide (NaOH) is used in the alkaline treatment process; it is responsible for the dissolution of the raw material and the formation of sheets. Note that its concentration has an impact on the optimal Ti/Na ratio .…”

Section: Preparation Of Tintsmentioning

confidence: 99%

“…However, various investigations have been realized for the purpose of determining the relationship between the properties of TiNTs and the base concentration when this base varied from 6, 8 to 10 N . After the reaction at 100 °C, during 88 hours, when the NaOH concentration was 8 N and 10 N during the alkaline treatment, it was found that the anatase was entirely transformed into layered TiNTs (H 2 Ti 3 O 7 ).…”

Section: Preparation Of Tintsmentioning

confidence: 99%

“…Regarding the surface of the obtained material based on P25 (50 m 2 .g −1 ), researchers obtained the values 363.4, 392.3, and 246.4 m 2 .g −1 for 10 N, 8 N, and 6 N, respectively. It is worth noting that the ratio Ti/Na plays an important role in the transformation of anatase into layered TiNTs . At the temperature of 220 °C, using different concentrations of NaOH, i. e. 0.5, 1 and 2 M, A. Rukini et al.…”

Section: Preparation Of Tintsmentioning

confidence: 99%

“…More recently, it was found that the PZC of the prepared TiNTs was related to the NaOH concentration used in the alkaline treatment. In this case, the authors obtained PZC values equal to 1.1, 2.7 and 1.8 for concentrations 10 N, 8 N and 6 N, respectively.…”

Section: Surface Properties Of Tintsmentioning

confidence: 99%

“…This acid behavior is very important for TiNTs. Therefore, it may be concluded that TiNTs can absorb negative charges or basic molecules on their surface . Since TiNTs suspended in water are weak acids, then the following dissociation can take place:

true normalH_{2} Ti_{3} normalO_{7} \to HTi_{3} normalO_{7}^{-} + normalH^{+}

…”

Section: Surface Properties 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%

Section: Preparation Of Tintsmentioning

confidence: 99%

Section: Preparation Of Tintsmentioning

confidence: 99%

Section: Surface Properties Of Tintsmentioning

confidence: 99%

true normalH_{2} Ti_{3} normalO_{7} \to HTi_{3} normalO_{7}^{-} + normalH^{+}

…”

Section: Surface Properties 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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Effective and sequential removal of acid and basic dye wastewater with metallic hybrid mesoporous silica

Wen

Wei

et al. 2021

Applied Organom Chemis

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In this work, nickel‐modified mesoporous silica prepared via sol–gel method (Ni‐S) and co‐precipitation method (Ni‐C) as effective adsorbents were successfully employed for the removal of acid fuchsin (AF) and basic fuchsin (BF). The effect of the retained templates on the adsorption of AF in synthetic materials was investigated in detail. The results indicated that retained templates contributed to improve the adsorption of AF and the theoretical maximum adsorption capacity of Ni‐S reached 689.66 mg/g according to Langmuir model. The electrostatic attraction between the anions (‐SO3−) in the dye molecules and the cations (‐NH3+) in the template (HAD) helps to enhance the adsorption effect. The adsorption isotherm and kinetics data fitted perfectly to Langmuir isotherm model and followed the pseudo‐second‐order kinetics. The thermodynamic parameters calculated from temperature‐dependent isotherms suggested that AF adsorption on nickel‐modified hexagonal mesoporous silica (Ni‐HMS) was endothermic and spontaneous process. In addition, the above‐mentioned adsorbents depleted after adsorbing AF could be recovered by simple calcination to apply into the adsorption of BF and exhibited excellent removal performance for basic dyes.

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A Multicomponent Mannich Reaction Catalyzed by Hydrolases Immobilized on Titanate Nanotubes

Bessoni Kosctiuk,

Ribeiro Neto,

Alcoforado Pereira

et al. 2024

ChemPlusChem

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This study presents an innovative method for synthesizing β‐amino carbonylated compounds, specifically 2‐[phenyl(phenylamino)methyl] cyclohexanone, achieving high conversions and diastereomeric ratios. Using trypsin or α‐chymotrypsin in both free and immobilized forms on titanate nanotubes (NtsTi), synthesized through alkaline hydrothermal methods, successful immobilization yields were attained. Notably, α‐chymotrypsin, when free, displayed a diastereoselective synthesis of the anti‐isomer with 97% conversion and 16:84 (syn:anti) diastereomeric ratio, which slightly decreased upon immobilization on NtsTi. Trypsin, in its free form, exhibited diastereoselective recognition of the syn‐isomer, while immobilization on NtsTi (trypsin/Ntsti) led to an inversion of diastereomeric ratio. Both trypsin/Ntsti and α‐chymotrypsin/NtsTi demonstrated significant catalytic efficiency over five cycles. In conclusion, NtsTi serves as an effective support for trypsin and α‐chymotrypsin immobilization, presenting promising prospects for diastereoselective synthesis and potential industrial applications. Furthermore, it offers promising prospects for the diastereoselective synthesis of 2‐[phenyl(phenylamino)methyl] cyclohexanone through multicomponent Mannich reaction and future industrial application.

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H2Ti3O7 titanate nanotubes for highly effective adsorption of basic fuchsin dye for water purification

Cited by 43 publications

References 37 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

Effective and sequential removal of acid and basic dye wastewater with metallic hybrid mesoporous silica

A Multicomponent Mannich Reaction Catalyzed by Hydrolases Immobilized on Titanate Nanotubes

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