Defective Bi.333(Bi6S9)Br/Bi2S3 heterostructure nanorods: Boosting the activity for efficient visible-light photocatalytic Cr(VI) reduction

Ai, Lili; Wang, Luxiang; Xu, Mengjiao; Zhang, Su; Guo, Nannan; Jia, Dianzeng; Jia, Lixia

doi:10.1016/j.apcatb.2020.119730

Cited by 58 publications

(9 citation statements)

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“…Bi 19 Br 3 S 27 is an important Bi III –VII A –VI A narrow-bandgap semiconductor material, with a cationic framework in which the halide anions are partially occupied in the channel. , Similar to other classes of well-studied photoactive bismuth-based oxyhalides, their defective structure and electronic structure are expected to be easily tuned via the engineering of the halide anions. Herein, with an alkali-etching strategy, a metallic defective Bi 19 Br 3 S 27 nanowire photocatalyst denoted as V–Bi 19 Br 3 S 27 has been synthesized and tailored to achieve a reconstructed interface with rich surface defects and oxygen doping.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation

et al. 2021

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Developing highly efficient photocatalysts to utilize solar radiation for converting CO2 into solar fuels is of great importance for energy sustainability and carbon neutralization. Herein, through an alkali-etching-introduced interface reconstruction strategy, a nanowire photocatalyst denoted as V–Bi19Br3S27, with rich Br and S dual-vacancies and surface Bi–O bonding introduced significant near-infrared (NIR) light response, has been developed. The as-obtained V–Bi19Br3S27 nanowires exhibit a highly efficient metallic photocatalytic reduction property for converting CO2 into CH3OH when excited solely under NIR light irradiation. Free of any cocatalyst and sacrificial agent, metallic defective V–Bi19Br3S27 shows 2.3-fold higher CH3OH generation than Bi19Br3S27 nanowires. The detailed interfacial structure evolution and reaction mechanism have been carefully illustrated down to the atomic scale. This work provides a unique interfacial engineering strategy for developing high-performance sulfur-based NIR photocatalysts for photon reducing CO2 into alcohol for achieving high-value solar fuel chemicals, which paves the way for efficiently using the solar radiation energy extending to the NIR range to achieve the carbon neutralization goal.

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Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation

et al. 2021

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“…This gives rise to an intervalence charge transfer absorption band in the NIR spectral region that accounts for its narrow band gap, uncommon for binary and ternary compounds with Bi-chalcogen–halogen composition. This represents a fundamental contribution to uncover the structure–property relationships of a material that is facing a rising interest and is being employed for diverse applications, ranging from photovoltaics , and photocatalysis , to thermoelectrics. , This work thus expands our knowledge on the chemistry, structure, and properties of metal chalcohalide nanomaterials and contributes to establish this class of mixed anion semiconductors as an effective complement to metal chalcogenides and metal halides.…”

Section: Discussionmentioning

confidence: 93%

Mixed Valence of Bismuth in Hexagonal Chalcohalide Nanocrystals

et al. 2023

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We report the colloidal synthesis of bismuth chalcohalide nanocrystals, which adopt a hexagonal phase that we describe with the Bi13S18X2 (in which X = Br and I) structure. Such a model structure displays columns of Bi atoms that form dimers of subvalent Bi (formally Bi2 4+), which we here ascribe to Peierls-type distortions. We suggest that the Bi2 4+ dimers are at the origin of the anomalously low band gap of this material, with the lowest energy electronic transition showing analogies with an intervalence charge transfer. Our synthetic approach and insights into the structural and electronic features of the hexagonal bismuth chalcohalides are fundamental to sustain the rapidly increasing use of this class of (nano)materials for diverse applications, such as photocatalysis and thermoelectrics.

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“…The photocatalytic activity of analogous materials like BiOBr and Bi 2 S 3 was also tested for comparison, and the degradation rates obtained were 33.92% and 13.14%, respectively, as presented in Figure b. Furthermore, the design of direct Z-scheme Bi 0.333 (Bi 6 S 9 )Br/Bi 2 S 3 heterostructure nanorods also boosted the photocatalytic Cr(VI) activity (Figure c) . During the heterojunction formation, sulfur defects were introduced into the hybrid system during phase evolution which can effectively adsorb and activate Cr(VI).…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

“…Chalcohalide − materials are just in the conception stage of this new discipline of multi-anion materials as photocatalysts compared to other multi-element compound semiconductors (Figure ). Chalcohalides are usually denoted as MCH, where M stands for one or more metal ions, C stands for chalcogenide, and H stand for halide ions.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

Shyamal,

Pradhan

2023

ACS Energy Lett.

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Nanocrystals of all-inorganic metal chalcohalides having a combination of chalcogen and halogen anions with appropriate crystal structure and bandgap can be ideal semiconductors in comparison to the well-established multicomponent family of nanostructures. These materials are one of the overlooked semiconductors which could play a paramount role in photocatalysis due to their stability, low-dimensional (1D) structure, and suitable bandgaps with efficient light-responsive nature. Emphasizing these materials, in this Review, recent developments in the design and application of different chalcohalide nanostructures are reported. The initial part is focused on the syntheses and crystal structures of reported chalcohalide materials, followed by an overview of their photocatalytic applications in different aspects. Finally, the successes and challenges associated with the future progress using these materials are discussed. This Review will provide an extended understanding and offer a preferred direction for the innovative design of these materials for environmental and especially energy-based applications.

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Defective Bi.333(Bi6S9)Br/Bi2S3 heterostructure nanorods: Boosting the activity for efficient visible-light photocatalytic Cr(VI) reduction

Cited by 58 publications

References 58 publications

Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation

Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation

Mixed Valence of Bismuth in Hexagonal Chalcohalide Nanocrystals

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

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Defective Bi.333(Bi6S9)Br/Bi2S3 heterostructure nanorods: Boosting the activity for efficient visible-light photocatalytic Cr(VI) reduction

Cited by 58 publications

References 58 publications

Interfacial Engineering of Bi19Br3S27 Nanowires Promotes Metallic Photocatalytic CO2 Reduction Activity under Near-Infrared Light Irradiation

Interfacial Engineering of Bi19Br3S27 Nanowires Promotes Metallic Photocatalytic CO2 Reduction Activity under Near-Infrared Light Irradiation

Mixed Valence of Bismuth in Hexagonal Chalcohalide Nanocrystals

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

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Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation

Interfacial Engineering of Bi₁₉Br₃S₂₇ Nanowires Promotes Metallic Photocatalytic CO₂ Reduction Activity under Near-Infrared Light Irradiation