Synthesis, Structure, and Photocatalysis in a New Structural Variant of the Aurivillius Phase:  LiBi4M3O14(M = Nb, Ta)

Muktha, B.; Priya, M. H.; Madras, Giridhar; Row, Tayur N. Guru

doi:10.1021/jp051228h

Cited by 33 publications

(23 citation statements)

References 37 publications

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“…where f85 and f25are the TE01 resonant frequencies at 85 o C and 25 o C, respectively. As reported by Muktha et al, 32 undoped Bi2(Li0.5Ta1.5)O7 crystalize in a variant of the Aurivillius structure with a monoclinic, C2/c space group. The diffraction peaksfrom 415141-ICSD (Inorganic Crystal Structure Database) are also plotted in Figure 1.…”

Section: Methodssupporting

confidence: 51%

High permittivity and low loss microwave dielectrics suitable for 5G resonators and low temperature co-fired ceramic architecture

et al. 2017

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Section: Methodssupporting

confidence: 51%

High permittivity and low loss microwave dielectrics suitable for 5G resonators and low temperature co-fired ceramic architecture

et al. 2017

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“…23,24 The replacement of W by Mo or vice versa in the Aurivillius solid solution series, Bi 2 Mo x W 1−x O 6 , enabled band gap alteration among the members with enhanced visible-light-induced photocatalytic activity. 25,26 Although, few reports on visible-light active photocatalysis over higher order members (n = 2, 3, 4) of the Aurivillius series were available, 13,15,16,19,27 more complex systems remained largely unexplored. Recently, the five layer (n = 5) Aurivillius phase, Bi 6 Ti 3 Fe 2 O 18 , has drawn attention for its ferroelectric, magnetic, and optical properteis.…”

Section: ■ Introductionmentioning

confidence: 99%

Efficient COD Removal Coinciding with Dye Decoloration by Five-Layer Aurivillius Perovskites under Sunlight-Irradiation

Gutta

Mandal

2015

ACS Sustainable Chem. Eng.

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An absorption edge in the visible region and a slow recombination of photogenerated electron−hole pairs in semiconductors are desirable for efficient sunlight-driven photocatalysis. One of the strategies to harvest visible-light instead of ultraviolet is to identify or develop new semiconductors with a band gap below 3 eV. The five-layer Aurivillius phase perovskites, Bi 6−x La x Ti 3 Fe 2 O 18 (x = 0, 1), where the band gap ranges from ∼2.02−2.57 eV, have been identified as potential members. The compounds, Bi 6−x La x Ti 3 Fe 2 O 18 (x = 0, 1), are synthesized by solid state reaction and characterized by PXD, FE-SEM, EDS, UV−vis DRS, and PL spectroscopy. La-substitution into Bi 6 Ti 3 Fe 2 O 18 results in a sluggish recombination of photogenerated electron−hole pairs in Bi 5 LaTi 3 Fe 2 O 18 as compared to the parent. The compounds showed remarkable photocatalytic performance toward Rhodamine B (RhB) degradation (more than 96%) within 30 min of sunlight-irradiation under mild acidic medium. Dye degradation is found to be coincident with COD removal. Moreover, the photocatalytic cycle test demonstrated the catalysts to be highly stable and reusable after five catalytic cycles without any noticeable decrease in the activity. Because of the fact that reactive oxygen species (ROS) are generated by sunlight-irradiation over the layered perovskite catalysts and that up to 95% COD removal takes place within 30 min, the catalysts may find practical application in dye/organic contaminant degradation or waste treatment that is sustainable without incurring any additional energy cost.

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“…LiBi 4 M 3 O 14 (M = Nb, Ta) samples were tested for the degradation of various dyes and phenolic compounds under UV irradiation [432]. The measured band-gap values of LiBi 4 Ta 3 O 14 and LiBi 4 Nb 3 O 14 were 3.5 and 3.0 eV, respectively.…”

Section: Quaternary Oxidesmentioning

confidence: 99%

A survey of photocatalytic materials for environmental remediation

Paola¹,

García‐López²,

Marcı̀³

et al. 2012

Journal of Hazardous Materials

831

357

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Heterogeneous photocatalysis is an advanced oxidation process which has been the subject of a huge amount of studies related to air cleaning and water purification. All these processes have been carried out mainly by using TiO(2)-based materials as the photocatalysts and ca. 75% of the articles published in the last 3 years is related to them. This review illustrates the efforts in the search of alternative photocatalysts that are not based on TiO(2), with some exceptions concerning particularly innovative modifications as nanoassembled TiO(2) or TiO(2) composites with active carbon, graphite and fullerene. Papers reporting preparation, characterization and testing of binary, ternary and quaternary compounds, have been reviewed. Despite many of these photocatalysts being effective for the photodecomposition of many pollutants, most of them do not allow a complete mineralization of the starting compounds, differently from TiO(2).

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Synthesis, Structure, and Photocatalysis in a New Structural Variant of the Aurivillius Phase: LiBi₄M₃O₁₄(M = Nb, Ta)

Cited by 33 publications

References 37 publications

High permittivity and low loss microwave dielectrics suitable for 5G resonators and low temperature co-fired ceramic architecture

High permittivity and low loss microwave dielectrics suitable for 5G resonators and low temperature co-fired ceramic architecture

Efficient COD Removal Coinciding with Dye Decoloration by Five-Layer Aurivillius Perovskites under Sunlight-Irradiation

A survey of photocatalytic materials for environmental remediation

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