Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (5): 1306-1315.DOI: 10.1016/S1872-2067(21)63936-0
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Jie Hea, Xuandong Wanga,d(), Shangbin Jinb, Zhao-Qing Liuc, Mingshan Zhua(
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Received:
2021-05-27
Accepted:
2021-06-27
Online:
2022-05-18
Published:
2022-03-23
Contact:
Xuandong Wang, Mingshan Zhu
Supported by:
Jie He, Xuandong Wang, Shangbin Jin, Zhao-Qing Liu, Mingshan Zhu. 2D metal-free heterostructure of covalent triazine framework/g-C3N4 for enhanced photocatalytic CO2 reduction with high selectivity[J]. Chinese Journal of Catalysis, 2022, 43(5): 1306-1315.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63936-0
Fig. 2. TEM patterns of CN (a), CTF (b) and CN/CTF heterostructure (c); (d) Enlarged TEM image of CN/CTF heterostructure; (e) XRD patterns of CN, CTF and CN/CTF.
Fig. 4. (a) Instantaneous photocurrent of CN and CN/CTF under light on/off; (b) EIS signals of CN and CN/CTF with/without light illumination; PL (c) and TR-PL decay curve (d) of CN and CN/CTF at the excitation light of 360 nm.
Sample | τ1 (ns) | A1 (%) | τ2 (ns) | A2 (%) | τav (ns) | kET (/s) |
---|---|---|---|---|---|---|
CN | 2.71 | 88.94 | 16.61 | 11.06 | 4.25 | — |
CN/CTF | 0.77 | 70.31 | 5.85 | 29.69 | 2.28 | 2.04 × 108 |
Table 1 TR-PL decay parameters of CN and CN/CTF at 360 nm stimulation wavelength.
Sample | τ1 (ns) | A1 (%) | τ2 (ns) | A2 (%) | τav (ns) | kET (/s) |
---|---|---|---|---|---|---|
CN | 2.71 | 88.94 | 16.61 | 11.06 | 4.25 | — |
CN/CTF | 0.77 | 70.31 | 5.85 | 29.69 | 2.28 | 2.04 × 108 |
Fig. 5. (a) Yield of reduced products with reaction time via CN/CTF (2.5%) heterostructure; (b) The comparison of CO yield for CO2 reduction under 200 mW/cm2 visible light within 3 h with blank, CTF, CN, CN/CTF (1.0%), CN/CTF (2.5%), CN/CTF (5.0%) in acetonitrile/Co(bpy)3Cl2 TEOA system; (c) Cycle runs of photo-catalytic CO2 reduction by CN/CTF (2.5%) heterostructure.
Fig. 7. Mott-Schottky plots of CN (a) and CTF (b); (c) Tauc’s plots of CN and CTF based on UV-Vis DRS spectrum; (d) Energy band structure of the as-synthesized CN/CTF heterostructure.
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