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- Publisher Website: 10.1021/acs.nanolett.8b00197
- Scopus: eid_2-s2.0-85046532964
- PMID: 29701060
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Article: Modulation of the Reduction Potential of TiO2- x by Fluorination for Efficient and Selective CH4 Generation from CO2 Photoreduction
Title | Modulation of the Reduction Potential of TiO<inf>2- x</inf> by Fluorination for Efficient and Selective CH<inf>4</inf> Generation from CO<inf>2</inf> Photoreduction |
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Authors | |
Keywords | CO photoreduction 2 fluorination mesoporous single crystal Photocatalysis semiconductors |
Issue Date | 2018 |
Citation | Nano Letters, 2018, v. 18, n. 6, p. 3384-3390 How to Cite? |
Abstract | Photocatalytic reduction of CO2 holds great promises for addressing both the environmental and energy issues that are facing the modern society. The major challenge of CO2 photoreduction into fuels such as methane or methanol is the low yield and poor selectivity. Here, we report an effective strategy to enhance the reduction potential of photoexcited electrons by fluorination of mesoporous single crystals of reduced TiO2-x. Density functional theory calculations and photoelectricity tests indicate that the Ti3+ impurity level is upswept by fluorination, owing to the built-in electric field constructed by the substitutional F that replaces surface oxygen vacancies, which leads to the enhanced reduction potential of photoexcited electrons. As a result, the fluorination of the reduced TiO2-x dramatically increases the CH4 production yield by 13 times from 0.125 to 1.63 μmol/g·h under solar light illumination with the CH4 selectivity being improved from 25.7% to 85.8%. Our finding provides a metal-free strategy for the selective CH4 generation from CO2 photoreduction. |
Persistent Identifier | http://hdl.handle.net/10722/341017 |
ISSN | 2021 Impact Factor: 12.262 2020 SCImago Journal Rankings: 4.853 |
DC Field | Value | Language |
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dc.contributor.author | Xing, Mingyang | - |
dc.contributor.author | Zhou, Yi | - |
dc.contributor.author | Dong, Chunyang | - |
dc.contributor.author | Cai, Lejuan | - |
dc.contributor.author | Zeng, Lixi | - |
dc.contributor.author | Shen, Bin | - |
dc.contributor.author | Pan, Lihan | - |
dc.contributor.author | Dong, Chencheng | - |
dc.contributor.author | Chai, Yang | - |
dc.contributor.author | Zhang, Jinlong | - |
dc.contributor.author | Yin, Yadong | - |
dc.date.accessioned | 2024-03-13T08:39:30Z | - |
dc.date.available | 2024-03-13T08:39:30Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Nano Letters, 2018, v. 18, n. 6, p. 3384-3390 | - |
dc.identifier.issn | 1530-6984 | - |
dc.identifier.uri | http://hdl.handle.net/10722/341017 | - |
dc.description.abstract | Photocatalytic reduction of CO2 holds great promises for addressing both the environmental and energy issues that are facing the modern society. The major challenge of CO2 photoreduction into fuels such as methane or methanol is the low yield and poor selectivity. Here, we report an effective strategy to enhance the reduction potential of photoexcited electrons by fluorination of mesoporous single crystals of reduced TiO2-x. Density functional theory calculations and photoelectricity tests indicate that the Ti3+ impurity level is upswept by fluorination, owing to the built-in electric field constructed by the substitutional F that replaces surface oxygen vacancies, which leads to the enhanced reduction potential of photoexcited electrons. As a result, the fluorination of the reduced TiO2-x dramatically increases the CH4 production yield by 13 times from 0.125 to 1.63 μmol/g·h under solar light illumination with the CH4 selectivity being improved from 25.7% to 85.8%. Our finding provides a metal-free strategy for the selective CH4 generation from CO2 photoreduction. | - |
dc.language | eng | - |
dc.relation.ispartof | Nano Letters | - |
dc.subject | CO photoreduction 2 | - |
dc.subject | fluorination | - |
dc.subject | mesoporous single crystal | - |
dc.subject | Photocatalysis | - |
dc.subject | semiconductors | - |
dc.title | Modulation of the Reduction Potential of TiO<inf>2- x</inf> by Fluorination for Efficient and Selective CH<inf>4</inf> Generation from CO<inf>2</inf> Photoreduction | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acs.nanolett.8b00197 | - |
dc.identifier.pmid | 29701060 | - |
dc.identifier.scopus | eid_2-s2.0-85046532964 | - |
dc.identifier.volume | 18 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 3384 | - |
dc.identifier.epage | 3390 | - |
dc.identifier.eissn | 1530-6992 | - |