Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (5): 781-794.DOI: 10.1016/S1872-2067(20)63690-7
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Naixu Lia,c, Meiyou Huanga, Jiancheng Zhoua,c,*(), Maochang Liub,d,#(), Dengwei Jingb,$()
Received:
2020-05-09
Accepted:
2020-05-09
Online:
2021-05-18
Published:
2021-01-29
Contact:
Jiancheng Zhou,Maochang Liu,Dengwei Jing
About author:
$ Tel: +86-29-82668721; E-mail: dwjing@mail.xjtu.edu.cnSupported by:
Naixu Li, Meiyou Huang, Jiancheng Zhou, Maochang Liu, Dengwei Jing. MgO and Au nanoparticle Co-modified g-C3N4 photocatalysts for enhanced photoreduction of CO2 with H2O[J]. Chinese Journal of Catalysis, 2021, 42(5): 781-794.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(20)63690-7
Fig. 2. SEM images of CN (a) and Au/3% MgO-CN (b); TEM (c) and HRTEM (d) image of Au/3% MgO-CN; STEM image (e) and corresponding EDX mappings (f-j) of Au/3% MgO-CN, indicating the particular distributions of Au (f), C (g), Mg (h), N (i), and O (j); (k) EDX pattern of the Au/3% MgO-CN catalyst.
Catalyst | SBET (m2/g) | Dpore (nm) | Vpore (cm3/g) |
---|---|---|---|
CN | 66.790 | 3.837 | 0.7645 |
MgO-CN | 67.618 | 3.455 | 0.8787 |
Au/MgO-CN | 61.963 | 3.821 | 0.9051 |
Table 1 Specific surface area, pore size, and pore volume of the different photocatalysts.
Catalyst | SBET (m2/g) | Dpore (nm) | Vpore (cm3/g) |
---|---|---|---|
CN | 66.790 | 3.837 | 0.7645 |
MgO-CN | 67.618 | 3.455 | 0.8787 |
Au/MgO-CN | 61.963 | 3.821 | 0.9051 |
Fig. 6. (a) UV-vis absorption spectra of CN, MgO-CN, and Au/MgO-CN; The transformed diffuse reflectance (b) and XPS valence band spectra (c) of CN and MgO; (d) PL spectra of CN, MgO-CN, and Au/MgO-CN.
Fig. 8. Photocatalytic performance of CO2 photoreduction with H2O vapor at 3 h under simulated solar irradiation. (a) Comparison of photocatalytic activities on 1% Au/3% MgO-CN, 1% Au/CN, 3% MgO-CN, and CN; The effect of amounts of MgO (b) and Au (c) nanoparticles, and metal cocatalysts (d).
Fig. 9. In situ DRIFTS spectra of the OH groups on the catalysts (3000-3800 cm-1) (a), CO2 adsorption (2200-2500 cm-1) (b), CO2 interaction (1300-1800 cm-1) with Au/3% MgO-CN under irradiation (c), and CO2-TPD profiles of CN, 3% MgO-CN, and Au/3% MgO-CN (d).
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