J. Semicond. > 2023, Volume 44 > Issue 5 > 052701, doi: 10.1088/1674-4926/44/5/052701
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ARTICLES

One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation

Mengchi Liu, Yiwen Cheng, Yuee Xie, Yingcong Wei, Jinhui Xing, Yuanping Chen and Jing Xu

+ Author Affiliations

 Corresponding author: Yuanping Chen, chenyp@ujs.edu.cn; Jing Xu, xjing@ujs.edu.cn

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Abstract: Broad-spectrum absorption and highly effective charge-carrier separation are two essential requirements to improve the photocatalytic performance of semiconductor-based photocatalysts. In this work, a fascinating one-photon system is reported by rationally fabricating 2D in-plane Bi2O3/BiOCl (i-Cl) heterostructures for efficient photocatalytic degradation of RhB and TC. Systematic investigations revealed that the matched band structure generated an internal electric field and a chemical bond connection between the Bi2O3 and BiOCl in the Bi2O3/BiOCl composite that could effectively improve the utilization ratio of visible light and the separation effectivity of photo-generated carriers in space. The formed interactions at the 2D in-plane heterojunction interface induced the one-photon excitation pathway which has been confirmed by the experiment and DFT calculations. As a result, the i-Cl samples showed significantly enhanced photocatalytic efficiency towards the degradation of RhB and TC (RhB: 0.106 min−1; TC: 0.048 min−1) under visible light. The degradation activities of RhB and TC for i-Cl were 265.08 and 4.08 times that of pure BiOCl, as well as 9.27 and 2.14 times that of mechanistically mixed Bi2O3/BiOCl samples, respectively. This work provides a logical strategy to construct other 2D in-plane heterojunctions with a one-photon excitation pathway with enhanced performance.

Key words: photocatalysis, CAU-17, Bismuth oxyhalides, one-photon excitation pathway, 2D in-plane heterojunction



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Fig. 1.  (Color online) The photo-generated carrier transport diagram (a) via one-photon excitation pathway and (b, c) in traditional heterostructure and 2D in-plane heterostructure.

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Fig. 2.  (Color online) (a) Schematic illustration for the synthesis of i-X (X = Cl, Br, I). (b, c) XRD patterns of CAU-17, Bi2O3, i-Cl, BiOCl, i-I, and i-Br.

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Fig. 3.  (Color online) (a) SEM images, (b) TEM, (c) HR-TEM images, (d–f) EDS mapping images and (g) EDX line profile result of i-Cl sample; Atomic structures of (h) BiOCl (110) and (i) Bi2O3 (201).

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Fig. 4.  (Color online) XPS spectra of BiOCl, i-Cl, and Bi2O3 samples: (a) survey spectra, (b) Bi 4f, (c) O 1s, (d) Cl 2p.

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Fig. 5.  (Color online) (a) The photocatalytic RhB degradation curves and (b) first-order kinetic fitting of curves of i-Cl, t-Cl, Bi2O3, and BiOCl samples. (c) The photocatalytic TC degradation curves and (d) first-order kinetic fitting of curves of i-Cl, t-Cl, Bi2O3, and BiOCl samples.

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Fig. 6.  (Color online) (a) The photocatalytic RhB degradation curves and (b) first-order kinetic fitting of curves of i-Cl, t-Cl, Bi2O3, and BiOCl samples in mixed wastewater. (c) The photocatalytic TC degradation curves and (d) first-order kinetic fitting of curves of i-Cl, t-Cl, Bi2O3 and BiOCl samples in mixed wastewater.

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Fig. 7.  (Color online) (a) UV-Vis DRS spectra, (b) PL spectra, (c) SPV, (d) photocurrent responses, and (e) the EIS Nyquist plots of the samples.

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Fig. 8.  (Color online) (a) Kubelka-Munk transformed reflectance spectra, (b) VB spectra of BiOCl and Bi2O3. (c) Band structures of Bi2O3 and BiOCl before and after contact. (d) Charge density difference of BiOCl/Bi2O3 heterojunction. The work function of (e) BiOCl (110) and (f) Bi2O3 (201).

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Fig. 9.  (Color online) (a) The reactive species trapping experiment and (b) ESR spectra of the i-Cl sample under light irradiation. (c) A plausible mechanism for the photocatalytic degradation of RhB and TC under visible light over the i-Cl sample.

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    Received: 13 January 2023 Revised: 07 February 2023 Online: Accepted Manuscript: 05 March 2023Uncorrected proof: 06 March 2023Published: 10 May 2023

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      Article Navigation >  Journal of Semiconductors  > 2023  >  44(5): 052701
      Mengchi Liu, Yiwen Cheng, Yuee Xie, Yingcong Wei, Jinhui Xing, Yuanping Chen, Jing Xu. One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation[J]. Journal of Semiconductors, 2023, 44(5): 052701. doi: 10.1088/1674-4926/44/5/052701 M C Liu, Y W Cheng, Y E Xie, Y C Wei, J H Xing, Y P Chen, J Xu. One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation[J]. J. Semicond, 2023, 44(5): 052701. doi: 10.1088/1674-4926/44/5/052701Export: BibTex EndNote
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      Mengchi Liu, Yiwen Cheng, Yuee Xie, Yingcong Wei, Jinhui Xing, Yuanping Chen, Jing Xu. One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation[J]. Journal of Semiconductors, 2023, 44(5): 052701. doi: 10.1088/1674-4926/44/5/052701

      M C Liu, Y W Cheng, Y E Xie, Y C Wei, J H Xing, Y P Chen, J Xu. One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation[J]. J. Semicond, 2023, 44(5): 052701. doi: 10.1088/1674-4926/44/5/052701
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      One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation

      doi: 10.1088/1674-4926/44/5/052701

      • School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China

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      • Author Bio:

        Mengchi Liu is a postgraduate student in the school of physics and electronic engineering, jiangsu university, majoring in physics. At present, the research direction is photocatalysis, and the specific content of the research is in-situ growth of Bi-based semiconductor heterojunction with Bi-MOF as a precursor, thereby improving the performance of photocatalysis sewage treatment

        Yuanping Chen received the Ph.D degree from Xiangtan University in 2007. He is currently a professor, doctoral supervisor, and a "double-creative talent" in Jiangsu Province, serving as Executive Vice Dean of School of Physics and Electronic Engineering. He is mainly engaged in the research of material properties, principles and applications, especially in the fields of topological materials, quantum transport, optoelectronic properties, etc. He has achieved a series of innovative results and published more than 100 high-level papers in Nat Energy, Nat Commun

      • Corresponding author: chenyp@ujs.edu.cn; xjing@ujs.edu.cn
      • Received Date: 2023-01-13
      • Revised Date: 2023-02-07
        • Available Online: 2023-03-05

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