Details
| Original language | English |
|---|---|
| Pages (from-to) | 611-618 |
| Number of pages | 8 |
| Journal | Applied Catalysis B: Environmental |
| Volume | 219 |
| Early online date | 5 Aug 2017 |
| Publication status | Published - 15 Dec 2017 |
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.
Keywords
- Three-dimensional structure, TiO, Z-Scheme system, ZnIn S
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Environmental Science(all)
- General Environmental Science
- Chemical Engineering(all)
- Process Chemistry and Technology
Sustainable Development Goals
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In: Applied Catalysis B: Environmental, Vol. 219, 15.12.2017, p. 611-618.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Well-designed 3D ZnIn2S4 nanosheets/TiO2 nanobelts as direct Z-scheme photocatalysts for CO2 photoreduction into renewable hydrocarbon fuel with high efficiency
AU - Yang, G.
AU - Chen, D.
AU - Ding, H.
AU - Feng, J.
AU - Zhang, J.Z.
AU - Zhu, Y.
AU - Hamid, S.
AU - Bahnemann, D.W.
N1 - Funding information: This work is supported by the National Natural Science Foundations of China (Grant No. 21577132 ), the Fundamental Research Funds for the Central Universities (Grant No. 2652015225 ). Appendix A
PY - 2017/12/15
Y1 - 2017/12/15
N2 - 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.
AB - 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.
KW - Three-dimensional structure
KW - TiO
KW - Z-Scheme system
KW - ZnIn S
UR - http://www.scopus.com/inward/record.url?scp=85027877433&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2017.08.016
DO - 10.1016/j.apcatb.2017.08.016
M3 - Article
VL - 219
SP - 611
EP - 618
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
ER -