Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (12): 2407021.doi: 10.3866/PKU.WHXB202407021
Special Issue: Solar fuel preparation
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Revealing Photoinduced Charge Transfer Mechanism of SnO2/BiOBr S-Scheme Heterostructure for CO2 Photoreduction
Yuejiao An1, Wenxuan Liu2, Yanfeng Zhang1,*(
), Jianjun Zhang3,*(), Zhansheng Lu4,2,*()
- 1 National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
2 School of Physics, Henan Key Laboratory of Advanced Semiconductor & Functional Device Integration, Henan Normal University, Xinxiang 453007, Henan Province, China
3 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, China
4 School of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
-
Received:2024-07-23Revised:2024-08-21Accepted:2024-08-22Published:2024-09-02 -
Contact:Email: zhangyanfeng@hebtu.edu.cn (Yanfeng Zhang)zslu@buct.edu.cn (Zhansheng Lu)zhangjianjun@cug.edu.cn (Jianjun Zhang) -
Supported by:National Natural Science Foundation of China(12274118); National Natural Science Foundation of China(52202375); Natural Science Foundation of Hebei of China(B2020205013); Natural Science Foundation of Hebei of China(B2022205008); Science and Technology Project of Hebei Normal University of China(L2021K01); Innovation Capability Improvement Plan Project of Hebei Province(22567604H); Henan Center for Outstanding Overseas Scientists(GZS2023007); Special Project for Fundamental Research in University of Henan Province(22ZX013)
Cite this article
Yuejiao An, Wenxuan Liu, Yanfeng Zhang, Jianjun Zhang, Zhansheng Lu. Revealing Photoinduced Charge Transfer Mechanism of SnO2/BiOBr S-Scheme Heterostructure for CO2 Photoreduction[J]. Acta Phys. -Chim. Sin. 2024, 40(12), 2407021. doi: 10.3866/PKU.WHXB202407021
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Fig 1
(a) XRD patterns (b) N2 physisorption desorption isotherms of BiOBr, SnO2, and SnO2/BiOBr heterojunctions with different molar ratios; (c) TEM image, (d) HRTEM image, (e–h) elemental mapping images of 40%SnO2/BiOBr."
Fig 2
(a) Yields for CO and CH4 on BiOBr, SnO2, 0.35SnB, 0.40SnB, 0.45SnB (35%SnO2/BiOBr, 40%SnO2/BiOBr, 45%SnO2/BiOBr) exposed to simulated solar irradiation; (b) Yields of CO and CH4 on 40%SnO2/BiOBr at various conditions; (c) Photocatalytic cycling performance; (d) Variation of yield with light duration of 40%SnO2/BiOBr."
Fig 3
High-resolution XPS spectra of pristine BiOBr, SnO2 and 40%SnO2/BiOBr: (a) Bi 4f; (b) O 1s; (c) Br 3d; (d) Sn 3d."
Fig 4
(a) UV-Vis DRS of BiOBr, SnO2 and SnO2/BiOBr with different ratios; (b) band gap energy; (c) Mott-Schottky curves and VBXPS; (d) band structure of BiOBr and SnO2."
Fig 5
(a, b) UPS spectra of BiOBr and SnO2; (c) charge density difference of the SnO2/ BiOBr heterojunction; (d–f) mechanism of electron transfer in SnO2/BiOBr heterojunction."
Fig 6
Pseudocolor fs-TA plots of (a) SnO2 and (b) SnO2/BiOBr using 340 nm pump pulse. fs-TA spectra of (c) SnO2 and (d) SnO2/BiOBr at indicated delay time. fs-TA decay kinetics of (e) SnO2 and (f) SnO2/BiOBr probed at 500 nm. Schematic for the quenching pathways of photogenerated electrons in (g) SnO2 and (h) SnO2/BiOBr."
Fig 7
Partial density of states (PDOS) of (a) BiOBr, (b) SnO2, (c) SnO2/BiOBr. band structure of (d) BiOBr, (e) SnO2, (f) SnO2/BiOBr."
Fig 8
(a) Transient photocurrent response curves, (b) electrochemical impedance curves, (c) photoluminescence emission spectra and (d) time-resolved PL attenuation of pristine SnO2, pristine BiOBr and 40%SnO2/BiOBr."
Fig 9
(a) In situ FTIR of 40%SnO2/BiOBr at light conditions with different reaction times; (b) pathway for photocatalytic conversion of CO2 to CO."
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