Chinese Journal of Catalysis ›› 2023, Vol. 52: 32-49.DOI: 10.1016/S1872-2067(23)64502-4
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Zicong Jianga, Bei Chenga, Liuyang Zhangb, Zhenyi Zhangc, Chuanbiao Bieb,*()
Received:
2023-07-11
Accepted:
2023-08-09
Online:
2023-09-18
Published:
2023-09-25
Contact:
*E-mail: About author:
Chuanbiao Bie (Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences) received his Ph.D. from Wuhan University of Technology in 2021. He is now a postdoctoral researcher at China University of Geosciences (Wuhan). His research interests focus on semiconductor photocatalysis, including photocatalytic H2 evolution, H2O2 production, CO2 reduction, and organic synthesis.
Supported by:
Zicong Jiang, Bei Cheng, Liuyang Zhang, Zhenyi Zhang, Chuanbiao Bie. A review on ZnO-based S-scheme heterojunction photocatalysts[J]. Chinese Journal of Catalysis, 2023, 52: 32-49.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64502-4
Fig. 3. Assumed (a) and thermodynamically favorable (b) PE transfer pathway in TZS. Challenges arising from the Brownian motion and thermal motion (c) and redox couple ions transfer from P1 to P2 in TZS (d).
Fig. 4. Assumed (a) and thermodynamically favorable (b) PE transfer path in ASSZH. Band diagrams of CdS, TiO2, and Au before contact (c) and after contact (d).
Fig. 5. Schematic illustrations of an S-scheme heterojunction. (a) The staggered band configurations of OS and RS before their contact. (b) The formation of IIEF after their contact. (c) The migration route of PE under light irradiation.
Fig. 7. Different types of ZnO-based S-scheme heterojunctions. (a) n-n junction with ZnO as the OS. (b) n-n junction with ZnO as the RS. (c) p-n junction with ZnO as the RS. (d) n-p junction with ZnO as the OS.
Method | Advantage | Disadvantage | Interfacial property |
---|---|---|---|
Hydrothermal/solvothermal | controllable size, high crystallinity, easy operation, mass production | required high temperature and pressure, high cost in solvent for solvothermal method | strong interaction and intimate interface |
Deposition-precipitation | narrow size distributions of particles, relatively rapid reaction rate | poor reproducibility, required post-calcination treatment | strong interaction and intimate interface |
Self-assembly | easy operation | low yield, poor stability | moderate interaction |
Thermal annealing | high synthetic efficiency, simple process | high energy consumption, particles aggregation | strong interaction and intimate interface |
Mechanical agitation | easy operation, low cost | poor reproducibility, uncontrollable size | weak interaction |
Table 1 The summarization of the preparation methods of ZnO-based S-scheme heterojunctions.
Method | Advantage | Disadvantage | Interfacial property |
---|---|---|---|
Hydrothermal/solvothermal | controllable size, high crystallinity, easy operation, mass production | required high temperature and pressure, high cost in solvent for solvothermal method | strong interaction and intimate interface |
Deposition-precipitation | narrow size distributions of particles, relatively rapid reaction rate | poor reproducibility, required post-calcination treatment | strong interaction and intimate interface |
Self-assembly | easy operation | low yield, poor stability | moderate interaction |
Thermal annealing | high synthetic efficiency, simple process | high energy consumption, particles aggregation | strong interaction and intimate interface |
Mechanical agitation | easy operation, low cost | poor reproducibility, uncontrollable size | weak interaction |
Fig. 8. ISIXPS spectra of C 1s (a), N 1s (b), Zn 2p (c), and O 1s (d) in ZnO/g-C3N4 S-scheme heterojunction. Reproduced with permission from Ref. [96] Copyright 2021, American Chemical Society.
Fig. 9. (a) Band configurations of N-ZnO/C and Bi2MoO6 before contact. (b) The transfer route of PC in N-ZnO/C@Bi2MoO6 S-scheme heterojunction under light irradiation. (c) DMPO-?OH and (d) DMPO-?O2? signals of samples. Reproduced with permission from Ref. [92]. Copyright 2021, Elsevier B.V.
Fig. 10. The optimized composite models, charge density difference, and IIEF strength of S-scheme g-C3N4/SnS2 (a,c,e) and O-C3N4/SnS2 (b,d,f) heterojunctions. Reproduced with permission from Ref. [105]. Copyright 2021, Elsevier B.V.
Fig. 11. UV-vis diffuse reflectance spectra (a), transient photocurrent responses (b), electrochemical impedance spectra (c), PL spectra (d), TRPL spectra (e), and the photocatalytic degradation curves (f) of SMX over different samples. (g) The stability test of N-ZnO/C@BiM for SMX degradation; (h) XPS spectra and (i) XRD patterns and SEM image (inset) of N-ZnO/C@BiM before and after four tests. Reproduced with permission from Ref. [48]. Copyright 2021, Elsevier B.V.
Fig. 12. SEM images of Ga2O3/ZnO/WO3 composite nanofibers before (a?c) and after (d?f) calcination. (g) Transfer pathways of PC in Ga2O3/ZnO/WO3 dual S-scheme heterojunction. Reproduced with permission from Ref. [132]. Copyright 2021, Springer Science+Business Media, LLC part of Springer Nature.
S-scheme heterojunction | Pollutant (Concentration) | pH | Dosage (mg mL‒1) | Light source (wavelength) | Photodegradation efficiency (%) | Active | Degradation | Ref. | |
---|---|---|---|---|---|---|---|---|---|
ZnO | Optimal sample | species | product | ||||||
ZnO-CoTe | methylene blue (20 mg L‒1) | 7 | 0.1 | Sunlight | 56.1 | 99.8 | •O2− | — | [ |
g-C3N4/ZnO | azophloxine (10 mg L‒1) | 7 | 1 | 500 W Xe lamp | — | 95 | •O2−, h+ | — | [ |
SrTiO3/porous ZnO | methyl orange (5 mg L‒1) | 7 | 0.1 | 300 W Xe lamp | 32.4 | 48.8 | •O2− | CO2, H2O | [ |
N-ZnO/g-C3N4 | norfloxacin (10 mg L‒1) | 7 | 0.2 | 300 W Xe lamp (λ > 420 nm) | 57.7 | 96.4 | h+ | CO2, H2O, F−, NO3− | [ |
CuO/ZnO | mercury ions (368.3 µmol L‒1) | 4 | 1 | 300 W Xe lamp (λ > 420 nm) | 6 | 100 | e− | Mercury | [ |
ZnO-V2O5-WO3 | methylene blue (10 μmol L‒1) | 7 | 0.6 | Sunlight | 78.8 | 99.8 | •O2− | — | [ |
C-ZnO/Ag3PO4 | ciprofloxacin (10 mg L‒1) | 7 | 2 | 300 W Xe lamp (λ > 420 nm) | — | 96.7 | h+, •O2− | — | [ |
ZnO/ZnMn2O4/ ZnS-PVA | Co-trimoxazole (5 mg L‒1) | 7 | 0.05 | 500 W Visible lamp | — | 90 | — | — | [ |
N-ZnO/C@Bi2MoO6 | sulfamethoxazole (5 mg L‒1) | 9 | 1 | 300 W Xe lamp (λ > 420 nm) | — | 92.9 | h+ | — | [ |
ZnO/Zn3(PO4)2 | tetracycline (20 mg L‒1) | 7 | 1 | 400 W Osram lamps (400 nm< λ <700 nm) | 17 | 82 | •O2− | — | [ |
ZnO/gC3N4 | methyl orange (10 mg L‒1) | 7 | 0.5 | Mercury lamp (Visible light) | 49 | 99 | — | — | [ |
ZnO-g-C3N4@PET | methylene blue (15 mg L‒1) | 7 | — | 350 W Xe lamp (λ > 420 nm) | 16.2 | 92.5 | •OH, h+ | — | [ |
WO3/Ag/ZnO | cephalexin (30 mg L‒1) | 7 | — | Blue LED lamps | 13.9 | 98.8 | •O2−, •OH | — | [ |
ZnO-NiO | azophloxine (20 ppm) | 7 | 0.2 | — | ~27 | 82 | •O2−, •OH | — | [ |
LaFeO3/ZnO | mercury ions (100 ppm) | 4 | 1.25 | 300 W Xe lamp (λ > 420 nm) | 6 | 100 | e− | Mercury | [ |
Bi2O3-ZnO/ bentonite clay | congo red (200 mg L‒1) | 7 | 8 | UV light | — | 100 | — | — | [ |
Curcumin/ZnO | amaranth (0.5 mol L‒1) | 7 | 1 | 300 W Solar simulator | 42 | 93 | •O2− | — | [ |
NiS/ZnO | P-nitrophenol (101 μM) | 7 | 0.12 | 8 W Phillips UV light (λ = 254 nm) | 65 | 96 | •OH | — | [ |
Ga2O3/ZnO/WO3 | Rhodamine B (100 mg L‒1) | 7 | 0.6 | 300 W Xe lamp | — | 98.4 | h+, •O2− | CO2, H2O | [ |
CuO/ZnO | mercury ions (100 mg L‒1) | 4 | 1.8 | Xe lamp | 4.1 | 100 | e− | Mercury | [ |
Table 2 Recent reports of ZnO-based S-scheme heterojunctions in the field of environmental remediation.
S-scheme heterojunction | Pollutant (Concentration) | pH | Dosage (mg mL‒1) | Light source (wavelength) | Photodegradation efficiency (%) | Active | Degradation | Ref. | |
---|---|---|---|---|---|---|---|---|---|
ZnO | Optimal sample | species | product | ||||||
ZnO-CoTe | methylene blue (20 mg L‒1) | 7 | 0.1 | Sunlight | 56.1 | 99.8 | •O2− | — | [ |
g-C3N4/ZnO | azophloxine (10 mg L‒1) | 7 | 1 | 500 W Xe lamp | — | 95 | •O2−, h+ | — | [ |
SrTiO3/porous ZnO | methyl orange (5 mg L‒1) | 7 | 0.1 | 300 W Xe lamp | 32.4 | 48.8 | •O2− | CO2, H2O | [ |
N-ZnO/g-C3N4 | norfloxacin (10 mg L‒1) | 7 | 0.2 | 300 W Xe lamp (λ > 420 nm) | 57.7 | 96.4 | h+ | CO2, H2O, F−, NO3− | [ |
CuO/ZnO | mercury ions (368.3 µmol L‒1) | 4 | 1 | 300 W Xe lamp (λ > 420 nm) | 6 | 100 | e− | Mercury | [ |
ZnO-V2O5-WO3 | methylene blue (10 μmol L‒1) | 7 | 0.6 | Sunlight | 78.8 | 99.8 | •O2− | — | [ |
C-ZnO/Ag3PO4 | ciprofloxacin (10 mg L‒1) | 7 | 2 | 300 W Xe lamp (λ > 420 nm) | — | 96.7 | h+, •O2− | — | [ |
ZnO/ZnMn2O4/ ZnS-PVA | Co-trimoxazole (5 mg L‒1) | 7 | 0.05 | 500 W Visible lamp | — | 90 | — | — | [ |
N-ZnO/C@Bi2MoO6 | sulfamethoxazole (5 mg L‒1) | 9 | 1 | 300 W Xe lamp (λ > 420 nm) | — | 92.9 | h+ | — | [ |
ZnO/Zn3(PO4)2 | tetracycline (20 mg L‒1) | 7 | 1 | 400 W Osram lamps (400 nm< λ <700 nm) | 17 | 82 | •O2− | — | [ |
ZnO/gC3N4 | methyl orange (10 mg L‒1) | 7 | 0.5 | Mercury lamp (Visible light) | 49 | 99 | — | — | [ |
ZnO-g-C3N4@PET | methylene blue (15 mg L‒1) | 7 | — | 350 W Xe lamp (λ > 420 nm) | 16.2 | 92.5 | •OH, h+ | — | [ |
WO3/Ag/ZnO | cephalexin (30 mg L‒1) | 7 | — | Blue LED lamps | 13.9 | 98.8 | •O2−, •OH | — | [ |
ZnO-NiO | azophloxine (20 ppm) | 7 | 0.2 | — | ~27 | 82 | •O2−, •OH | — | [ |
LaFeO3/ZnO | mercury ions (100 ppm) | 4 | 1.25 | 300 W Xe lamp (λ > 420 nm) | 6 | 100 | e− | Mercury | [ |
Bi2O3-ZnO/ bentonite clay | congo red (200 mg L‒1) | 7 | 8 | UV light | — | 100 | — | — | [ |
Curcumin/ZnO | amaranth (0.5 mol L‒1) | 7 | 1 | 300 W Solar simulator | 42 | 93 | •O2− | — | [ |
NiS/ZnO | P-nitrophenol (101 μM) | 7 | 0.12 | 8 W Phillips UV light (λ = 254 nm) | 65 | 96 | •OH | — | [ |
Ga2O3/ZnO/WO3 | Rhodamine B (100 mg L‒1) | 7 | 0.6 | 300 W Xe lamp | — | 98.4 | h+, •O2− | CO2, H2O | [ |
CuO/ZnO | mercury ions (100 mg L‒1) | 4 | 1.8 | Xe lamp | 4.1 | 100 | e− | Mercury | [ |
Fig. 13. (a) Band structures of ZnxCd1-xS-DETA and ZnO. (b) The transfer route of PC in the ZnO/Zn0.5Cd0.5S-DETA S-scheme heterojunction under light irradiation. (c) Charge density difference of ZnO (100)/Zn0.5Cd0.5S (101), the charge accumulation is denoted by yellow, and the charge depletion is denoted by cyan; time courses of photocatalytic H2 production (d) and corresponding H2 evolution rates (e) of the S-scheme photocatalysts. Reproduced with permission. (f) Cycling stability test results for Zn0.5Cd0.5S-DETA and ZOZCS-2. Reproduced with permission from Ref. [31]. Copyright 2022, Wiley-VCH GmbH.
Fig. 14. (a) The transfer route of PC in ZnO/CdS/MoS2 heterojunctions under light irradiation; electrochemical impedance spectroscopy spectra (b), transient photocurrent spectra (c), and photocatalytic H2 evolution activities (d) of samples; stability tests for H2 evolution (e) and XRD patterns before and after 5 cycles (f) over ZCM-3 sample. Reproduced with permission from Ref. [27]. Copyright 2021, Elsevier B.V.
Fig. 15. SEM (a) and transmission electron microscope (TEM) (b) images of ZnO/WO3 composites; Photocatalytic H2O2 production activities (c) and fitted rate constants (d) of H2O2 decomposition (Kd) and formation (Kf) values of different samples. Reproduced with permission from Ref. [13]. Copyright 2021, Elsevier Ltd.
Fig. 16. Schematic illustrations of the ZnMn2O4/ZnO S-scheme heterojunction. (a) Staggered band configurations before contact. (b) Band bending and formation of IIEF after contact. (c) Transfer route of PC under light irradiation. (d) CO2 photoreduction performance of photocatalysts. (e) Recycling performance of ZZM30. Reproduced with permission from Ref. [91]. Copyright 2020, Elsevier B.V.
Fig. 17. Schematic diagram of the U(VI) extraction process from natural seawater using ZnO/Znln2S4 S-scheme heterojunctions. Reproduced with permission from Ref. [73]. Copyright 2022, Elsevier B.V.
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