Phase transformations during HLnTiO4 (Ln=La, Nd) thermolysis and photocatalytic activity of obtained compounds

Silyukov, Oleg I.; Abdulaeva, Liliia D.; Burovikhina, Alena A.; Rodionov, Ivan A.; Зверева, И. А.

doi:10.1016/j.jssc.2015.02.008

Cited by 27 publications

(9 citation statements)

References 38 publications

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“…Their structure may be presented as an alteration of perovskite blocks and interlayer cations with the general formulae A'[A n−1 B n O 3n+1 ] (for DJ) and A' 2 [A n−1 B n O 3n+1 ] (for RP) (Machida et al, 2005;Compton et al, 2007;Huang et al, 2011;Chen et al, 2012;Rodionov et al, 2012Rodionov et al, , 2017Sabio et al, 2012;Zvereva and Rodionov, 2013). These compounds are amenable to reactions involving their interlayer space, such as intercalation and ion exchange, which provide their unique photocatalytic properties (Zvereva et al, 2011;Silyukov et al, 2015;Rodionov et al, 2018;Shelyapina et al, 2019).…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…In particular, compounds related to the Dion-Jacobson (DJ), Aurivillius (AV), and Ruddlesden-Popper (RP) phases consisting of negatively charged perovskite layers and interlayer cations with general formula A ′ [A n−1 B n O 3n+1 ] and A ′ 2 [A n−1 B n O 3n+1 ] were most actively investigated as photocatalysts (Machida et al, 2005;Compton et al, 2007;Huang et al, 2011;Chen et al, 2012;Rodionov et al, 2012Rodionov et al, , 2017aSabio et al, 2012;Zvereva and Rodionov, 2013). These materials exhibit unique photocatalytic properties derived from their layered structure, including ionexchange and intercalation (Zvereva et al, 2011;Silyukov et al, 2015;Rodionov et al, 2017c;Shelyapina et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Layered Titanate H2Nd2Ti3O10 Intercalated With n-Butylamine: A New Highly Efficient Hybrid Photocatalyst for Hydrogen Production From Aqueous Solutions of Alcohols

et al. 2019

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A layered perovskite-type oxide intercalated with n-butylamine is reported as an efficient photocatalyst for hydrogen production from aqueous solutions of alcohols for the first time. The hybrid photocatalyst H 2 Nd 2 Ti 3 O 10 ×BuNH 2 was synthesized by solid-state ceramic method followed by protonation, intercalation of methylamine and subsequent substitution by n-butylamine. The product was characterized by powder XRD, TGA, STA-MS, DRS, IR, and Raman spectroscopy, CHN analysis, SEM. Intercalation of n-butylamine caused a dramatic increase in photocatalytic activity of H 2 Nd 2 Ti 3 O 10 in the reaction of hydrogen evolution from aqueous solutions of methanol, ethanol, and n-butanol under UV radiation. While the non-intercalated Pt-loaded H 2 Nd 2 Ti 3 O 10 showed a maximum quantum efficiency of only 2% in the 220-340 nm range, the efficiency for hybrid samples reached 23% under the same conditions and after variation of experimental parameters even 52% efficiency was achieved. This effect may be associated with the significant expansion of the interlayer space, which is considered as a separate reaction zone.

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“…Layered perovskite-like titanates ALnTiO 4 (A = alkali cation or proton, Ln = La or lanthanoid cation) are Ruddlesden-Popper phases whose unique structure is characterized by the complete ordering of the aforementioned cations between two nonequivalent interlayer spaces interbedded by perovskite slabs with a thickness of n = 1 titanium-oxygen octahedron experiencing pronounced vertical distortion [45,46]. These compounds attract the attention of researchers as promising proton conductors [47][48][49][50][51], catalysts [52], photocatalysts [53][54][55][56] as well as luminescent [57] and magnetically susceptible materials [58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis

Silyukov

Kurnosenko

Minich

et al. 2021

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Structures of partially and completely protonated Ruddlesden–Popper phases, H0.7Na0.3NdTiO4·0.3H2O and HNdTiO4, have been established by means of neutron and X-ray diffraction analysis and compared among themselves as well as with that of the initial titanate NaNdTiO4. It was shown that while interlayer sodium cations in the partially protonated form are coordinated by nine oxygen atoms, including one related to intercalated water, in the fully protonated compound the ninth oxygen proves to be an axial anion belonging to the opposite slab of titanium-oxygen octahedra. Moreover, the partially protonated titanate was found to significantly differ from the other two in the octahedron distortion pattern. It is characterized by a weakly pronounced elongation of the octahedra towards the Nd-containing interlayer space making Ti4+ cations practically equidistant from both axial oxygen atoms, which is accompanied by a low-frequency shift of the bands relating to the asymmetric stretching mode of axial Ti–O bonds observed in the Raman spectra.

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Phase transformations during HLnTiO4 (Ln=La, Nd) thermolysis and photocatalytic activity of obtained compounds

Cited by 27 publications

References 38 publications

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

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

Layered Titanate H2Nd2Ti3O10 Intercalated With n-Butylamine: A New Highly Efficient Hybrid Photocatalyst for Hydrogen Production From Aqueous Solutions of Alcohols

Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis

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