Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (2): 316-328.DOI: 10.1016/S1872-2067(21)63846-9
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Weiqi Guoa,b, Haolin Luoa,b, Zhi Jianga,b,*(), Wenfeng Shangguana,b
Received:
2021-03-17
Accepted:
2021-05-06
Online:
2022-02-18
Published:
2021-05-24
Contact:
Zhi Jiang
Supported by:
Weiqi Guo, Haolin Luo, Zhi Jiang, Wenfeng Shangguan. In-situ pressure-induced BiVO4/Bi0.6Y0.4VO4 S-scheme heterojunction for enhanced photocatalytic overall water splitting activity[J]. Chinese Journal of Catalysis, 2022, 43(2): 316-328.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63846-9
Fig. 4. BF (a), DF2 (b), DF4 (c), HAADF (d) images. (e) Local enlargement of BF images; (f) HAADF overlap within mixed elements mapping (Bi,Y,V); (g) Signal fluctuations of HADDF coupling with elements (Bi,Y,V) distribution along the yellow line; (h-k) Elemental mapping (Bi,Y,V,O) results for BYV-H HP.
Fig. 5. XPS results (a), O 1s and V 2p (b), Bi 4f and Y 3d (c) for BYV-H, BYV-H HP, and ms-BiVO4; (d) Valence band spectra for the BYV-H and BYV-H HP samples.
Scheme 2. Schematic of relative band energy positions and the proposed photocatalytic overall water splitting mechanism for BYV-H and BYV-H HP under light irradiation.
Fig. 6. UV-Vis diffuse reflectance spectra (UV-Vis DRS) of BYV-H and BYV-H HP (a), BYV-C and BYV-C HP (c); Taups plots of BYV-H and BYV-H HP (b), BYV-C and BYV-C HP (d).
Fig. 7. (a) Photocatalytic OWS activity for BYV-H, BYV-H HP, BYV-C, and BYV-C HP in pure water without any sacrificial reagent under 300 W Xe lamp irradiation; (b) Cyclic stability test for the BYV-H HP sample; (c) Photocatalytic OWS activity for BYV-H HP (hourly measurements).
Fig. 8. (a) Transient photocurrent (i-t) curves at the bias of 0.6 V (V vs. Ag/AgCl); (b) Electrochemical impedance spectra (EIS) at the open-circuit potential (OCP) under dark and light conditions; (c) Transient open-circuit voltage decay (OCVD) profiles; (d) Lifetimes of photogenerated charge carriers obtained from OCVD, and Mott-Schottky (M-S) plots of (e) BYV-H and (f) BYV-H HP photoanode.
Fig. 9. Photogenerated carrier dynamics. (a) Time-resolved photoluminescence spectra (TRPL); (b) Photoluminescence spectra (PL); (c) Surface photovoltage spectrum (SPS) for BYV-H, BYV-H HP, and ms-BiVO4.
Fig. 10. (a) TEM; (b) HRTEM; (c) Signal fluctuations of HADDF coupling with Au element distribution along the yellow line in the TEM image for BYV-H HP loaded with 0.05% Au.
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