Preparation and exfoliation of layered titanium butyl phosphates

Tanaka, Hidekazu; Ishida, Keigo; Okumiya, Takeshi; Murakami, Masahiko

doi:10.1007/s00396-010-2280-0

Cited by 4 publications

(6 citation statements)

References 34 publications

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“…The addition of HDBP resulted in the evolution of a peak at 2θ = 5.9–6.3°, which translates into an interlayer spacing of 1.41–1.51 nm. This observation corresponds with an earlier study and suggests that these materials contain self-assembled butyl group layers stacked via van der Waals interactions . Despite the layered structure, the material lacks long-range periodic order.…”

Section: Results and Discussionsupporting

confidence: 91%

“…This observation corresponds with an earlier study and suggests that these materials contain self-assembled butyl group layers stacked via van der Waals interactions. 29 Despite the layered structure, the material lacks long-range periodic order. This is mainly due to the high reactivity of Ti(IV), leading to the formation of octahedral Ti-oxo-clusters and consequently amorphous coordination polymers.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The ATR–FTIR peaks (Figure b) centered at 2959, 2934, 2906, and 2874 cm –1 are assigned to the stretching vibration of C–H in butyl groups. The 1465 cm –1 band represents the deformation vibration of the same groups . The IR absorptions at 1023 and 733 cm –1 are typical vibrational modes for C–O–(P) in phase vibration and P–O 3 symmetrical stretching, respectively .…”

Section: Results and Discussionmentioning

confidence: 99%

“… 26 Titanium(IV) forms insoluble, layer-structured precipitates with DBP in the form of a coordination polymer. 29 The resultant material is composed of alternating bilayers of butyl chains and titanium(IV) phosphate. Although titanium(IV) and zirconium(IV) phosphonates were intensively studied, 30 , 31 there has been extremely limited information regarding the properties and application of titanium(IV) organophosphate materials in metal separation.…”

Section: Introductionmentioning

confidence: 99%

“…The ratio of the solubility product constants ( K sp ) between Dy(DBP) 3 and Nd(DBP) 3 is reported to be more than 4000 (DBP is the deprotonated form of HDBP) . Titanium(IV) forms insoluble, layer-structured precipitates with DBP in the form of a coordination polymer . The resultant material is composed of alternating bilayers of butyl chains and titanium(IV) phosphate.…”

Section: Introductionmentioning

confidence: 99%

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Intralanthanide Separation on Layered Titanium(IV) Organophosphate Materials via a Selective Transmetalation Process

Zhang

Hietala

Khriachtchev

et al. 2018

ACS Appl. Mater. Interfaces

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The lanthanides (Ln) are an essential part of many advanced technologies. Our societal transformation toward renewable energy drives their ever-growing demand. The similar chemical properties of the Ln pose fundamental difficulties in separating them from each other, yet high purity elements are crucial for specific applications. Here, we propose an intralanthanide separation method utilizing a group of titanium(IV) butyl phosphate coordination polymers as solid-phase extractants. These materials are characterized, and they contain layered structures directed by the hydrophobic interaction of the alkyl chains. The selective Ln uptake results from the transmetalation reaction (framework metal cation exchange), where the titanium(IV) serves as sacrificial coordination centers. The “tetrad effect” is observed from a dilute Ln3+ mixture. However, smaller Ln3+ ions are preferentially extracted in competitive binary separation models between adjacent Ln pairs. The intralanthanide ion-exchange selectivity arises synergistically from the coordination and steric strain preferences, both of which follow the reversed Ln contraction order. A one-step aqueous separation of neodymium (Nd) and dysprosium (Dy) is quantitatively achievable by simply controlling the solution pH in a batch mode, translating into a separation factor of greater than 2000 and 99.1% molar purity of Dy in the solid phase. Coordination polymers provide a versatile platform for further exploring selective Ln separation processes via the transmetalation process.

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Section: Results and Discussionsupporting

confidence: 91%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Intralanthanide Separation on Layered Titanium(IV) Organophosphate Materials via a Selective Transmetalation Process

Zhang

Hietala

Khriachtchev

et al. 2018

ACS Appl. Mater. Interfaces

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Synthesis of Layered Hydroxide Zinc m‐Aminobenzoate Compounds and Their Exfoliation Reactions

Zhao

Wang

et al. 2011

Chin. J. Chem.

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Two types of layered hydroxide zinc m-aminobenzoate compounds with structures of layered basic metal salt (LBMS) were prepared by the reaction of zinc hydroxide with m-aminobenzoic acid solution in the temperature range of 40-120 ℃. The formation reactions, structures, chemical compositions, and exfoliation reactions of the layered compounds in alcohol solvents were investigated by XRD, TG-DTA, SEM, and TEM. One layered phase with a basal spacing of 1.08 nm has a α-Ni(OH) 2 -like structure, and its chemical formula can be written as Zn(OH) 0.67 (m-NH 2 C 6 H 4 COO) 1.33 . This phase has strip-like particle morphology and cannot be exfoliated into its nanosheets in alcohol solvents. The other layered phase with a basal spacing of 2.66 nm has a zinc hydroxide-nitrate-like structure, and can be exfoliated in alcohol solvents.

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Exfoliation and europium(III)-functionalization of α-titanium phosphate via propylamine intercalation: from multilayer assemblies to single nanosheets

et al. 2019

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Layered α-titanium phosphate intercalated with propylamine, Ti(HPO4)2•2C3H7NH2•H2O (α-TiPPr), has been synthesized by solid-vapour reaction and then exfoliated via a single-stage approach based on overnight stirring in aqueous medium. The obtained nanosheets were then functionalized using solid-liquid reaction with europium(III) nitrate aqueous solutions. The obtained materials were characterized by powder X-ray diffraction (PXRD), N2 adsorptiondesorption isotherms at 77K, scanning electron microscopy (SEM), transmission electron microscopy (TEM, SAED, STEM-EDX), atomic force microscopy (AFM) and photoluminescence spectroscopy (PL). The europium(III) sorption takes place via two distinct pathways, the first is the previously reported C3H7NH3 + /[Eu(H2O)6] 3+ ion-exchange process into the titanium-phosphate interlayer space of the multilayered α-TiPPr. The second pathway is the self-assembly of single-sheets which is provoked by electrostatic interactions between the negatively charged titanium-phosphate sheets and the Eu(III)-aqueous cations, leading to the formation of layered ultra-nanoparticles.

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Preparation and exfoliation of layered titanium butyl phosphates

Cited by 4 publications

References 34 publications

Intralanthanide Separation on Layered Titanium(IV) Organophosphate Materials via a Selective Transmetalation Process

Intralanthanide Separation on Layered Titanium(IV) Organophosphate Materials via a Selective Transmetalation Process

Synthesis of Layered Hydroxide Zinc m‐Aminobenzoate Compounds and Their Exfoliation Reactions

Exfoliation and europium(III)-functionalization of α-titanium phosphate via propylamine intercalation: from multilayer assemblies to single nanosheets

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