Synthesis and thermal stability of new inorganic-organic perovskite-like hybrids based on layered titanates HLnTiO4 (Ln = La, Nd)

Kurnosenko, Sergei A.; Silyukov, Oleg I.; Mazur, Anton S.; Zvereva, Irina A.

doi:10.1016/j.ceramint.2019.10.249

Cited by 21 publications

(16 citation statements)

References 65 publications

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“…The observed increase in the interlayer distance is generally consistent with the molecule sizes of methylamine (~3 Å), n -butylamine (~6.7 Å), and a methyl group (~2 Å) of methanol (assuming grafting) if we take into account the additional expansion caused by intercalated water molecules and possible bilayer arrangement. At the same time, the interlayer distance of the monoethanolamine hybrid is consistent with the single monoethanolamine molecule size (5.3 Å), similar to what was observed in the case of the HLnTiO 4 (Ln = La and Nd) hybrids studied earlier [ 54 ].…”

Section: Resultssupporting

confidence: 88%

NMR Study of Intercalates and Grafted Organic Derivatives of H2La2Ti3O10

et al. 2020

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The protonated perovskite-like titanate H2La2Ti3O10 has been used to produce organic-inorganic hybrids with simple organic molecules: methylamine, methanol, monoethanolamine, and n-butylamine. The optimal pathways for the preparation of such hybrids are summarized. Solid-state NMR, combined with thermal analysis, Raman, and IR spectroscopy, has been applied to determine the bonding type in the obtained organic-inorganic hybrids. It has been found that, in the methanolic hybrid, the organic residues are covalently bound to the inorganic matrix. In contrast, in the methylamine and n-butylamine hybrids, the organic molecules are intercalated into the inorganic matrix in cationic forms. The structure of the monoethanolamine hybrid is composite and includes both the covalently bound and intercalated organic species.

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Section: Resultssupporting

confidence: 88%

NMR Study of Intercalates and Grafted Organic Derivatives of H2La2Ti3O10

et al. 2020

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“…At the same time, stretching modes of equatorial (490, 580 cm −1 ) and located in central octahedra (765 cm −1 ) Nb-O fragments are seen not to be influenced by the amines introduction into the inorganic matrix. IR spectra (Supporting Information S2) also confirm the formation of the derivatives and point at the presence of water molecules in the interlayer space (1,625 cm −1 ) that is typical of other amine-modified compounds Kurnosenko et al, 2019;Rodionov et al, 2019) due to formation of strong hydrogen bonds. Processing of the TG curve (Rodionov et al, 2017(Rodionov et al, , 2019 corresponding to the initial protonated niobate (Figure 3) confirmed that HCN 3 ·yH 2 O does not contain residual potassium cations from the alkali precursor KCN 3 and exists in the hydrated form HCN 3 ·1.5H 2 O.…”

Section: Characterization Of the Samplesmentioning

confidence: 78%

“…Reactions of HCN 3 ·yH 2 O with n-alkylamines lead to a series of single-phase amine derivatives with greater c parameters because of intercalation of amines into the interlayer space. In general, the c lattice parameter, which is known to correspond to the interlayer distance of the sample Kurnosenko et al, 2019), was found to be proportional to the length of the n-alkylamine chain that consists with earlier reports Jacobson et al, 1986;Tahara and Sugahara, 2003;Kurnosenko et al, 2019;Rodionov et al, 2019). Since all the samples were successfully indexed in the P4/mmm group without doubling of the c lattice parameter, we suppose that intercalation of amines did not cause a relative shift of adjacent perovskite slabs which is absent in the case of the initial protonated niobate HCN 3 ·yH 2 O.…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

Study of n-alkylamine Intercalated Layered Perovskite-Like Niobates HCa2Nb3O10 as Photocatalysts for Hydrogen Production From an Aqueous Solution of Methanol

et al. 2020

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A series of hybrid niobates HCa 2 Nb 3 O 10 ×RNH 2 , containing n-alkylamines (R = Me, Et, Pr, Bu, Hx, Oc) intercalated into the interlayer space, has been thoroughly studied concerning the photocatalytic hydrogen production from a model aqueous solution of methanol for the first time. All the hybrid photocatalysts were synthesized by the conventional ceramic technique followed by protonation and intercalation of nalkylamines. The products were characterized using XRD, Raman, IR and diffuse reflectance spectroscopy, TGA, CHN-analysis and SEM. Photocatalytic measurements were conducted according to an advanced scheme taking into account possible changes in the photocatalyst concentration because of sedimentation, pH shifts and exfoliation of the samples into nanoplatelets. Special attention was also paid to the feasible improvement of the photocatalytic activity of the samples via their modification with Pt nanoparticles as a cocatalyst. In the series of amine derivatives, the highest rate of hydrogen generation was demonstrated by the Pt-loaded HCa 2 Nb 3 O 10 ×BuNH 2 reaching apparent quantum efficiency of 13% in the 220-340 nm range. The initial HCa 2 Nb 3 O 10 showed comparable efficiency of 8.3% that is greater than for other amine derivatives. It was demonstrated that for the investigated samples the photocatalytic activity correlates with their ability of water intercalation.

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“…[106] Recently, Silyukov et al has demonstrated the work on HLnTiO 4 (Ln = La, Nd) belonging to n = 1 membered RP phase by using MA method to yield IOH's by utilizing methylamine, methanol, monoethanolamine, and n-butylamine. [107] Additionally, Silyukov et. al has also synthesized new IOH's by n-alkylamines (methylamine, ethylamine, n-propylamine, nbutylamine, n-hexylamine, and n-octylamine) intercalation in protonated anhydrous and hydrated H 2 K 0.5 Bi 2.5 Ti 4 O 13 .H 2 O (HKBT 4 ⋅ H 2 O) perovskite-based layered titenates for the first time.…”

Section: Grafting and Intercalation Reactions Of Dj/rp Perovskitementioning

confidence: 99%

A Review on the Synthesis and Modification of Functional Inorganic‐Organic‐Hybrid Materials via Microwave‐Assisted Method

Atri

Tomar

2021

ChemistrySelect

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The microwave-assisted method is an appropriate route; to overcome the energy barrier for stabilizing perovskite structured based inorganic-organic-hybrid materials. The motivation for using the microwave-assisted method in material science as an effective heating technique results from improvement in the topochemical modification of layered perovskite oxides. The microwave-assisted method causes a fall in time duration from days to hours/minutes and produces good quality products with high crystallinity. Inorganic-organic-hybrids can be derived easily by the stepwise modification of layered perovskites. These modification techniques involve proton exchange, grafting, intercalation, and exfoliation steps. The microwave synthesized inorganic-organic-hybrid materials are in high demand due to their various interesting properties, potential catalytic, optical, composite, magnetic, and electronic, making them useful for technological applications.

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Synthesis and thermal stability of new inorganic-organic perovskite-like hybrids based on layered titanates HLnTiO4 (Ln = La, Nd)

Cited by 21 publications

References 65 publications

NMR Study of Intercalates and Grafted Organic Derivatives of H2La2Ti3O10

NMR Study of Intercalates and Grafted Organic Derivatives of H2La2Ti3O10

Study of n-alkylamine Intercalated Layered Perovskite-Like Niobates HCa2Nb3O10 as Photocatalysts for Hydrogen Production From an Aqueous Solution of Methanol

A Review on the Synthesis and Modification of Functional Inorganic‐Organic‐Hybrid Materials via Microwave‐Assisted Method

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