Well-designed 3D ZnIn2S4 nanosheets/TiO2 nanobelts as direct Z-scheme photocatalysts for CO2 photoreduction into renewable hydrocarbon fuel with high efficiency
- authored by
- G. Yang, D. Chen, H. Ding, J. Feng, J.Z. Zhang, Y. Zhu, S. Hamid, D.W. Bahnemann
- Abstract
A 3-dimensional (3D) ZnIn
2S
4/TiO
2 Z-scheme system has been designed and constructed for photocatalytic reduction of CO
2 into renewable hydrocarbon fuels without the use of a solid-state electron mediator. The unique 3D morphology, achieved by assembling 2D ZnIn
2S
4 nanosheets onto 1D TiO
2 nanobelts, not only provides large surface area but also improves the separation and transfer efficiency of photogenerated electrons and holes. The 3D ZnIn
2S
4/TiO
2 Z-scheme photocatalysts show excellent light-harvesting properties demonstrated in photocatalytic reduction of CO
2, resulting in generation of desired hydrocarbons. The CH
4 production rate of the 3D ZnIn
2S
4/TiO
2 can reach up to 1.135 μmol g
−1 h
−1, which is about 39-times higher than that of bare ZnIn
2S
4 (0.029 μmol g
−1 h
−1). The enhanced photocatalytic activity is attributed to effective separation of the charge carriers between ZnIn
2S
4 and TiO
2 through the direct Z-scheme instead of a type-II heterojunction. The photogenerated electrons in TiO
2 nanobelts recombine with the holes in ZnIn
2S
4 nanosheets, and the unrecombined electrons/holes on different active sites have stronger reduction/oxidation abilities, leading to higher photocatalytic activity for CO
2 reduction.
- Organisation(s)
-
Institute of Technical Chemistry
- Type
- Article
- Journal
- Applied Catalysis B: Environmental
- Volume
- 219
- Pages
- 611-618
- No. of pages
- 8
- ISSN
- 0926-3373
- Publication date
- 15.12.2017
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Catalysis, General Environmental Science, Process Chemistry and Technology
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1016/j.apcatb.2017.08.016 (Access:
Closed)
