Chinese Journal of Catalysis ›› 2023, Vol. 48: 267-278.DOI: 10.1016/S1872-2067(23)64420-1
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Houwei He1, Zhongliao Wang1, Kai Dai*(), Suwen Li*(), Jinfeng Zhang*()
Received:
2023-01-18
Accepted:
2023-02-28
Online:
2023-05-18
Published:
2023-04-20
Contact:
* E-mail: About author:
First author contact:1Contributed equally to this work.
Supported by:
Houwei He, Zhongliao Wang, Kai Dai, Suwen Li, Jinfeng Zhang. LSPR-enhanced carbon-coated In2O3/W18O49 S-scheme heterojunction for efficient CO2 photoreduction[J]. Chinese Journal of Catalysis, 2023, 48: 267-278.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64420-1
Fig. 2. SEM images of C-In2O3 (a), W18O49 (b), and 40%C-In2O3/W18O49 (c). (d) TEM image of C-In2O3. (e) HRTEM image of 40%C-In2O3/W18O49. (f-i) Element mapping images of C-In2O3/W18O49.
Fig. 3. (a) XRD patterns of In2O3, X%C-In2O3/W18O49, and W18O49. Full spectrum (b), C 1s (c), W 4f (d), In 3d (e), and O 1s (f) XPS spectra of samples.
Fig. 4. (a) UV-Vis diffuse reflectance spectra of different photocatalysts. (b) Plots of (αhν)2 versus energy (hν) for W18O49 and C-In2O3. (c,d) Mott-Schottky curve of W18O49 and C-In2O3. (e) Transient photocurrent response patterns of the photocatalysts. (f) EIS curves for C-In2O3, 40%C-In2O3/W18O49, and W18O49.
Sample | A1 (%) | τ1 (ns) | A2 (%) | τ2 (ns) | A3 (%) | τ3 (ns) | τA (ns) |
---|---|---|---|---|---|---|---|
W18O49 | 48.40 | 0.4861 | 34.87 | 2.4622 | 16.73 | 10.8105 | 2.9025 |
C-In2O3 | 59.21 | 0.5868 | 25.58 | 2.6342 | 15.21 | 11.9292 | 2.8358 |
C-In2O3/W18O49 | 49.56 | 0.8126 | 34.41 | 3.5399 | 19.02 | 13.4359 | 4.0707 |
Table 1 Dynamics analysis of the emission decay for different samples.
Sample | A1 (%) | τ1 (ns) | A2 (%) | τ2 (ns) | A3 (%) | τ3 (ns) | τA (ns) |
---|---|---|---|---|---|---|---|
W18O49 | 48.40 | 0.4861 | 34.87 | 2.4622 | 16.73 | 10.8105 | 2.9025 |
C-In2O3 | 59.21 | 0.5868 | 25.58 | 2.6342 | 15.21 | 11.9292 | 2.8358 |
C-In2O3/W18O49 | 49.56 | 0.8126 | 34.41 | 3.5399 | 19.02 | 13.4359 | 4.0707 |
Fig. 7. (a) CO evolution rate of all the samples. (b) Performance cycle experiments. (c) Performance comparison of the catalysts with and without carbon coating. (d) CO evolution rate of the catalysts under different experimental conditions. (e,f) The mass spectroscopy analysis result of CO stemmed from the 13CO2 isotope experiment of 40%C-In2O3/W18O49 and in situ DRIFTS spectra.
Fig. 8. (a) Optimized structural models of W18O49 (100) and (b) In2O3 (100). (c,d) Calculated Fermi levels and work functions for W18O49 (100) and In2O3 (111).
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