Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (7): 1851-1859.DOI: 10.1016/S1872-2067(21)63989-X
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Yu-Lan Wu, Ming-Yu Qi, Chang-Long Tan, Zi-Rong Tang(), Yi-Jun Xu(
)
Received:
2021-10-08
Accepted:
2021-12-06
Online:
2022-07-18
Published:
2022-05-20
Contact:
Zi-Rong Tang, Yi-Jun Xu
Supported by:
Yu-Lan Wu, Ming-Yu Qi, Chang-Long Tan, Zi-Rong Tang, Yi-Jun Xu. Photocatalytic selective oxidation of aromatic alcohols coupled with hydrogen evolution over CdS/WO3 composites[J]. Chinese Journal of Catalysis, 2022, 43(7): 1851-1859.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63989-X
Fig. 1. (a) Schematic diagram of the preparation process of CdS/WO3 composites. FESEM (b) and HRTEM (c) images of CdS/WO3-20 composite. (d) The magnification image of the selected area in the red circle of panel c. EDS spectrum (e) and Element mapping (f) of Cd, S, W, and O of CdS/WO3-20 composite.
Fig. 2. (a) XRD patterns of WO3, CdS and CdS/WO3; XPS spectra of Cd 3d (b), S 2p (c), W 4f (d) and O 1s (e) of the pure CdS (bottom), the pure WO3 (bottom) and CdS/WO3-20 composite(top). (f) DRS spectra of the WO3, CdS and CdS/WO3-x composites.
Fig. 3. (a) The results of photocatalytic performance tests of H2 evolution integrated with selective BA oxidation into BAD over bare WO3, bare CdS and CdS/WO3-x composites. (b) Photocatalytic cyclic tests over CdS/WO3-20 composite. Reaction conditions: 5 mg catalysts, 100 μmol BA, 10 mL H2O, full spectrum, irradiation for 2 h.
Entry | Alcohol substrate | Yield of oxidation product (μmol) | Yield of H2 (μmol) | |
---|---|---|---|---|
1 | 1-phenylethanol | Acetophenone | 79.9 | 103.1 |
2 | p-methoxybenzyl alcohol | Anisaldehyde | 76.3 | 102.3 |
3 | p-methylbenzyl alcohol | p-methyl benzaldehyde | 67.9 | 95.2 |
4 | p-fluorobenzyl alcohol | p-fluorobenzaldehyde | 60.6 | 91.6 |
5 | Furfuryl alcohol | Furfural | 78.0 | 82.3 |
6 | p-chlorobenzyl alcohol | p-chlorobenzaldehyde | 43.5 | 87.2 |
Table 1 Photocatalytic H2 evolution integrated with a series of biomass-derived alcohols oxidation.
Entry | Alcohol substrate | Yield of oxidation product (μmol) | Yield of H2 (μmol) | |
---|---|---|---|---|
1 | 1-phenylethanol | Acetophenone | 79.9 | 103.1 |
2 | p-methoxybenzyl alcohol | Anisaldehyde | 76.3 | 102.3 |
3 | p-methylbenzyl alcohol | p-methyl benzaldehyde | 67.9 | 95.2 |
4 | p-fluorobenzyl alcohol | p-fluorobenzaldehyde | 60.6 | 91.6 |
5 | Furfuryl alcohol | Furfural | 78.0 | 82.3 |
6 | p-chlorobenzyl alcohol | p-chlorobenzaldehyde | 43.5 | 87.2 |
Fig. 4. (a) Polarization curves of bare CdS, bare WO3 and CdS/WO3-20 composite. (b) Photocurrent density under full spectrum. (c) The EIS Nyquist plots of bare CdS, bare WO3 and CdS/WO3-20 composite. EPR spectra of DMPO-•O2- (d), DMPO-•OH (e) and EPR spectra (f) of DMPO-CH(OH)Ph over bare CdS, bare WO3 and CdS/WO3-20 composite with light irradiation.
Fig. 5. The schematic diagram of the charge transfers in CdS/WO3-20 heterojunction (left) and proposed reaction mechanism for photocatalytic BA oxidation integrated with H2 evolution over CdS/WO3 composite (right).
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