Chinese Journal of Catalysis ›› 2024, Vol. 61: 205-214.DOI: 10.1016/S1872-2067(24)60039-2
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Yunhang Shaoa,b, Yaning Zhanga,b, Chaofeng Chena,b, Shuai Doua,b, Yang Loua,b, Yuming Donga,b, Yongfa Zhuc, Chengsi Pana,b,*()
Received:
2024-01-25
Accepted:
2024-04-10
Online:
2024-06-18
Published:
2024-06-20
Contact:
* E-mail: Supported by:
Yunhang Shao, Yaning Zhang, Chaofeng Chen, Shuai Dou, Yang Lou, Yuming Dong, Yongfa Zhu, Chengsi Pan. Enhancement of H2O2 generation rate in porphyrin photocatalysts via crystal facets regulation to create strong internal electric field[J]. Chinese Journal of Catalysis, 2024, 61: 205-214.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60039-2
Fig. 1. TEM images of THF-TCPP (a), MeOH-TCPP (b), and EG-TCPP (c). HRTEM images of THF-TCPP (d), MeOH-TCPP (e), and EG-TCPP (f). Geometric relationship between observed lattice and exposed facet for THF-TCPP (g), MeOH-TCPP (h), and EG-TCPP (i).
Fig. 2. Crystal models of the (400) (a), (022) (b), and (020) (c) planes, respectively. The upper and lower figures represent the top and side views of the planes, respectively.
Fig. 3. H2O2 production activity of THF-TCPP, MeOH-TCPP, and EG-TCPP under 300 W Xe lamp with a 420 nm cut-off filter irradiation (a) and under 425 nm LED lamp irradiation (b). (c) Stability of H2O2 production for THF-TCPP, MeOH-TCPP, and EG-TCPP. (d) Comparison of the H2O2 generation rate between THF-TCPP and SA-TCPP at various temperatures. Solution: 30?mL H2O, catalyst: 1.5 g L?1, O2 bubbling.
Fig. 4. UV-Vis DRS spectra (a), Tauc plots (b), and Mott-Schottky plots (c) of THF-TCPP, MeOH-TCPP, and EG-TCPP. The flat-band potential (Efb) was obtained from the X intercepts of the linear region in MS plots. (d) Schematics of HOMO-LUMO of THF-TCPP, MeOH-TCPP, and EG-TCPP.
Fig. 5. Transient photocurrent (a), EIS spectra (b), steady-state PL spectra (c), and PL decay spectra (d) of THF-TCPP, MeOH-TCPP, and EG-TCPP. Excitation wavelength: 720 nm; Emission wavelength: 983 nm.
Fig. 7. Charge density difference on (400) (a), (022) (b), and (020) (c) planes of TCPP. Electrostatic potentials within (400) (d), (022) (e), and (020) (f) planes.
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