Cl-doped Bi2S3 homojunction nanorods with rich-defects for collaboratively boosting photocatalytic reduction performance

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

doi:10.1016/j.apsusc.2020.147002

Cited by 47 publications

(11 citation statements)

References 63 publications

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“…As shown in Figure 5, the absorption curves of bulk CuS and Bi 2 S 3 are very similar to the experimental measurement results in literatures. [ 7 ] However, there are certain differences between DFT calculation results in this work and the experimental measurement results in literatures. The underlying reasons can be ascribed to the following: the optical properties considered are derived from the electron direct transition from the valence band to conduction band in DFT calculation.…”

Section: Resultsmentioning

confidence: 66%

“…To date, to enhance photocatalytic performance, some strategies have been proposed, such as loading noble metals, preparing solid solutions, doping, and constructing heterostructures. [ 7 ] Constructing heterostructure photocatalysts, which are formed by two or more semiconductor photocatalysts, is an effective strategy. It can enhance the separation of photogenerated electron–hole pairs by appropriate band alignments between the semiconductors.…”

Section: Introductionmentioning

confidence: 99%

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Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Shan

Deng

Zhao

2021

Physica Status Solidi (b)

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Composite heterostructure photocatalysts can effectively improve photocatalytic performance. For narrow‐bandgap semiconductors, such as Bi2S3, constructing heterostructures with other semiconductors can obviously promote the separation of photogenerated electron−hole pairs and improve their photocatalytic performance. However, some basic and important parts of this technology still require further clarification. Herein, the interface properties of CuS/Bi2S3 heterostructure was studied using density functional theory calculations. The results show that the electronic structure of the interface model shows some different characteristics compared with the bulk and surface models due to the different bonding modes and chemical environments at the interface. At the interface of the CuS/Bi2S3 heterostructure, the band edge of CuS is bent downward relative to Bi2S3 to form a type II heterostructure. In addition, in the equilibrium state, the direction of the built‐in electric field of the heterostructure is from Bi2S3 to CuS. Therefore, the photogenerated electron−hole pairs can be separated by the CuS/Bi2S3 interface, which is extremely advantageous for the improvement of photocatalytic performance. The formation of the CuS/Bi2S3 heterostructure not only broadens the light absorption of CuS but also suppresses the recombination of photogenerated electron−hole pairs of the narrow‐bandgap semiconductor Bi2S3.

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Section: Resultsmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Shan

Deng

Zhao

2021

Physica Status Solidi (b)

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“…Figure d shows the Bi 4f and S 2p XPS spectra of Bi 2 S 3 and Bi 2 S 3 /N-RGO composites, indicating the successful synthesis of the Bi 2 S 3 material. The typical peaks at 158.5 and 163.8 eV and at 161.4 and 162.3 eV in the Bi 4f and S 2p XPS spectrum of Bi 2 S 3 are assigned to Bi 4f 7/2 and 4f 5/2 and S 2p 3/2 and 2p 1/2 orbitals, respectively. ,, These results suggest that the valence state of Bi is +3 and that of S is −2, corresponding to the Bi–S bond. ,, Interestingly, the binding energy of Bi 4f and S 2p in Bi 2 S 3 /N-RGO composites shows an obvious red shift, consistent with the N 1s spectrum. Bi 2 S 3 and N-RGO have an intimate synergetic interaction, which promotes the migration of electrons.…”

Section: Resultsmentioning

confidence: 85%

Electrochemical Co-reduction of N₂ and CO₂ to Urea Using Bi₂S₃ Nanorods Anchored to N-Doped Reduced Graphene Oxide

Xing

Wei

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Producing "green urea" using renewable energy, N 2 , and CO 2 is a long-considered challenge. Herein, an electrocatalyst, Bi 2 S 3 /N-reduced graphene oxide (RGO), was synthesized by loading the Bi 2 S 3 nanorods onto the N-RGO via a hydrothermal method. The Bi 2 S 3 /N-RGO composites exhibit the highest yield of urea (4.4 mmol g −1 h −1 ), which is 12.6 and 3.1 times higher than that of Bi 2 S 3 (0.35 mmol g −1 h −1 ) and that of N-RGO (1.4 mmol g −1 h −1 ), respectively. N-RGO, because of its porous and openlayer structure, improves the mass transfer efficiency and stability, while the basic groups (-OH and -NH 2 ) promote the adsorption and activation of CO 2 . Bi 2 S 3 promotes the absorption and activation of inert N 2 . Finally, the defect sites and the synergistic effect on the Bi 2 S 3 /N-RGO composites work simultaneously to form urea from N 2 and CO 2 . This study provides new insights into urea synthesis under ambient conditions and a strategy for the design and development of a new material for green urea synthesis. KEYWORDS: N-doped reduced graphene oxide, Bi 2 S 3 nanorods, N 2 and CO 2 adsorption and activation, electrocatalytic synthesis of urea, couple C−N bond

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“…The optical property was measured by a fluorescence spectrophotometer (PL, Hitachi F‐4500, Japan) and UV‐Vis spectrophotometer (Hitachi U‐3010, Japan). The photoreduction of Cr(VI) and photocatalytic degradation RhB over the obtained samples was carried out according to the procedures described in our previous studies 24 . Briefly, 10 mg of the photocatalyst was added to 50 mL of Cr(VI) solution or RhB solution in a quartz tube, the photocatalytic performance was tested after adsorption and desorption equilibrium.…”

Section: Methodsmentioning

confidence: 99%

“…The photoreduction of Cr(VI) and photocatalytic degradation RhB over the obtained samples was carried out according to the procedures described in our previous studies. 24 Briefly, 10 mg of the photocatalyst was added to 50 mL of Cr(VI) solution or RhB solution in a quartz tube, the photocatalytic performance was tested after adsorption and desorption equilibrium. The density functional theory (DFT) calculation method was described in the Supplementary Material.…”

Section: Characterizationmentioning

confidence: 99%

( Bi ₁₉ S ₂₇ I ₃ ) _0.6667 nanorods with more negative potentials of conduction band as highly active photocatalysts under visible light

Wang

Guo

et al. 2022

Intl J of Energy Research

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Summary The rational design of photocatalysts with more negative potentials of the conduction band is of vital importance in improving the performance of photocatalysts for reduction reactions. In this work, highly crystalline and uniform (Bi19S27I3)0.6667 nanorods were firstly synthesized by a one‐step hydrothermal process. The formation of the (Bi19S27I3)0.6667 nanorods consists of nucleation and crystal growth in agglomerates of spherical particles. The obtained (Bi19S27I3)0.6667 nanorods with a narrow band gap of about 1.80 eV, a wide visible light absorption spectrum, and a more negative conduction band potential are capable of producing high‐reducibility electrons, and an efficiently photogenerated carriers separation capability. The results demonstrate that the (Bi19S27I3)0.6667 nanorods can be as efficient and stable photocatalysts for Cr(VI) photoreduction and RhB degradation reactions. The photocatalytic reduction efficiency of Cr(VI) over the (Bi19S27I3)0.6667 nanorods was determined to be more than 3 times those of the corresponding BiOI and Bi2S3 photocatalysts under visible light. The detailed formation mechanism of (Bi19S27I3)0.6667 nanorods and the reaction mechanism of Cr(VI) photoreduction were proposed based on various characterizations.

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Cl-doped Bi2S3 homojunction nanorods with rich-defects for collaboratively boosting photocatalytic reduction performance

Cited by 47 publications

References 63 publications

Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Electrochemical Co-reduction of N₂ and CO₂ to Urea Using Bi₂S₃ Nanorods Anchored to N-Doped Reduced Graphene Oxide

( Bi ₁₉ S ₂₇ I ₃ ) _0.6667 nanorods with more negative potentials of conduction band as highly active photocatalysts under visible light

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Cl-doped Bi2S3 homojunction nanorods with rich-defects for collaboratively boosting photocatalytic reduction performance

Cited by 47 publications

References 63 publications

Density Functional Theory Study on the Interfacial Properties of CuS/Bi2S3 Heterostructure

Density Functional Theory Study on the Interfacial Properties of CuS/Bi2S3 Heterostructure

Electrochemical Co-reduction of N2 and CO2 to Urea Using Bi2S3 Nanorods Anchored to N-Doped Reduced Graphene Oxide

( Bi 19 S 27 I 3 ) 0.6667 nanorods with more negative potentials of conduction band as highly active photocatalysts under visible light

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Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Density Functional Theory Study on the Interfacial Properties of CuS/Bi₂S₃ Heterostructure

Electrochemical Co-reduction of N₂ and CO₂ to Urea Using Bi₂S₃ Nanorods Anchored to N-Doped Reduced Graphene Oxide

( Bi ₁₉ S ₂₇ I ₃ ) _0.6667 nanorods with more negative potentials of conduction band as highly active photocatalysts under visible light