Achieving simultaneous Cu particles anchoring in meso-porous TiO<inf>2</inf> nanofabrication for enhancing photo-catalytic CO<inf>2</inf> reduction through rapid charge separation
- Publisher:
- Elsevier
- Publication Type:
- Journal Article
- Citation:
- Chinese Chemical Letters, 2022, 33, (3), pp. 1313-1316
- Issue Date:
- 2022-03-01
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 1-s2.0-S1001841721005520-main.pdf | 1.47 MB |
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A facile solvo-thermal approach was successfully employed to prepare titanium oxide (TiO2) nano-aggregates with simultaneous copper particles anchoring. The as-synthesized composite could convert CO2 into CH4 and CO products under simulated solar irradiation. The impact of copper loading amounts on the photo-reduction capability was evaluated. It was found proper amount of Cu loading could enhance the activity of CO2 photo-reduction. As a result, the optimal composite (TiO2-Cu-5%) consisting of TiO2 supported with 5% (mole ratio) Cu exhibits 2.2 times higher CH4 yield and 3 times higher CO yield compared with pure TiO2. Conduction band calculated from the band gap and valence X-ray photoelectron spectroscopy (XPS) indicated TiO2 nano-aggregates have suitable band edge alignment with respect to the CO2/CH4 and CO2/CO redox potential. Furthermore, with involving of Cu particles, an efficient separation of photo-generated charges was achieved on the basis of photocurrent response and photoluminescence spectra results, which contributed to the improved photo-catalytic performance. The present work suggested that the Cu-decorated TiO2 could serve as an efficient photo-catalyst for solar-driven CO2 photo-reduction.
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