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Article: Edge‐Enriched Ultrathin MoS2 Embedded Yolk‐Shell TiO2 with Boosted Charge Transfer for Superior Photocatalytic H2 Evolution

TitleEdge‐Enriched Ultrathin MoS<font size=-1><sub>2</sup></font> Embedded Yolk‐Shell TiO<font size=-1><sub>2</sup></font> with Boosted Charge Transfer for Superior Photocatalytic H<font size=-1><sub>2</sup></font> Evolution
Authors
Keywordsembedded
hydrogen evolution
molybdenum disulfide
time‐resolved fluorescence kinetics
titanium dioxide
Issue Date2019
PublisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm
Citation
Advanced Functional Materials, 2019, v. 29 n. 36, p. article no. 1901958 How to Cite?
AbstractExploring TiO2‐photocatalysts for sunlight conversion has high demand in artificial photosynthesis. In this work, edge‐enriched ultrathin molybdenum disulfide (MoS2) flakes are uniformly embedded into the bulk of yolk‐shell TiO2 as a cocatalyst to accelerate photogenerated‐electron transfer from the bulk to the surface of TiO2. The as‐formed MoS2/TiO2 (0.14 wt%) hybrids exhibit a high hydrogen evolution rate (HER) of 2443 µmol g−1 h−1, about 1000% and 470% of that of pristine TiO2 (247 µmol g−1 h−1) and bulk MoS2 decorated TiO2 (513 µmol g−1 h−1). Such a greatly enhanced HER is attributed to the exposed catalytic edges of the ultrathin MoS2 flakes with a robust chemical linkage (TiS bond), providing rapid charge transfer channels between TiO2 and MoS2. The catalytic stability is promoted by the antiaggregation of the highly dispersed MoS2 flakes in the bulk of yolk‐shell TiO2. The exponential fitted decay kinetics of time‐resolved photoluminescence (ns‐PL) spectra illustrates that embedding ultrathin MoS2 flakes in TiO2 effectively decreases the average lifetime of PL in the MoS2/TiO2 hybrids (τave = 4.55 ns), faster than that of pristine TiO2 (≈7.17 ns) and the bulk MoS2/TiO2 (≈6.13 ns), allowing a superior charge separation and charge trapping process for reducing water.
Persistent Identifierhttp://hdl.handle.net/10722/286180
ISSN
2019 Impact Factor: 16.836
2015 SCImago Journal Rankings: 5.210

 

DC FieldValueLanguage
dc.contributor.authorWANG, W-
dc.contributor.authorZhu, S-
dc.contributor.authorCao, YN-
dc.contributor.authorTao, Y-
dc.contributor.authorLi, X-
dc.contributor.authorPan, DL-
dc.contributor.authorPhillips, DL-
dc.contributor.authorZhang, DQ-
dc.contributor.authorChen, M-
dc.contributor.authorLi, G-
dc.contributor.authorLi, H-
dc.date.accessioned2020-08-31T07:00:16Z-
dc.date.available2020-08-31T07:00:16Z-
dc.date.issued2019-
dc.identifier.citationAdvanced Functional Materials, 2019, v. 29 n. 36, p. article no. 1901958-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10722/286180-
dc.description.abstractExploring TiO2‐photocatalysts for sunlight conversion has high demand in artificial photosynthesis. In this work, edge‐enriched ultrathin molybdenum disulfide (MoS2) flakes are uniformly embedded into the bulk of yolk‐shell TiO2 as a cocatalyst to accelerate photogenerated‐electron transfer from the bulk to the surface of TiO2. The as‐formed MoS2/TiO2 (0.14 wt%) hybrids exhibit a high hydrogen evolution rate (HER) of 2443 µmol g−1 h−1, about 1000% and 470% of that of pristine TiO2 (247 µmol g−1 h−1) and bulk MoS2 decorated TiO2 (513 µmol g−1 h−1). Such a greatly enhanced HER is attributed to the exposed catalytic edges of the ultrathin MoS2 flakes with a robust chemical linkage (TiS bond), providing rapid charge transfer channels between TiO2 and MoS2. The catalytic stability is promoted by the antiaggregation of the highly dispersed MoS2 flakes in the bulk of yolk‐shell TiO2. The exponential fitted decay kinetics of time‐resolved photoluminescence (ns‐PL) spectra illustrates that embedding ultrathin MoS2 flakes in TiO2 effectively decreases the average lifetime of PL in the MoS2/TiO2 hybrids (τave = 4.55 ns), faster than that of pristine TiO2 (≈7.17 ns) and the bulk MoS2/TiO2 (≈6.13 ns), allowing a superior charge separation and charge trapping process for reducing water.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm-
dc.relation.ispartofAdvanced Functional Materials-
dc.rightsThis is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectembedded-
dc.subjecthydrogen evolution-
dc.subjectmolybdenum disulfide-
dc.subjecttime‐resolved fluorescence kinetics-
dc.subjecttitanium dioxide-
dc.titleEdge‐Enriched Ultrathin MoS<font size=-1><sub>2</sup></font> Embedded Yolk‐Shell TiO<font size=-1><sub>2</sup></font> with Boosted Charge Transfer for Superior Photocatalytic H<font size=-1><sub>2</sup></font> Evolution-
dc.typeArticle-
dc.identifier.emailPhillips, DL: phillips@hku.hk-
dc.identifier.authorityPhillips, DL=rp00770-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adfm.201901958-
dc.identifier.scopuseid_2-s2.0-85068496904-
dc.identifier.hkuros313842-
dc.identifier.volume29-
dc.identifier.issue36-
dc.identifier.spagearticle no. 1901958-
dc.identifier.epagearticle no. 1901958-
dc.publisher.placeGermany-

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