Experimental and DFT studies of Au deposition over WO3/g‑C3N4 Z‑scheme heterojunction
dc.contributor.author | Humayun, M | |
dc.contributor.author | Ullah, H | |
dc.contributor.author | Cao, J | |
dc.contributor.author | Pi, W | |
dc.contributor.author | Yuan, Y | |
dc.contributor.author | Ali, S | |
dc.contributor.author | Tahir, AA | |
dc.contributor.author | Yue, P | |
dc.contributor.author | Khan, A | |
dc.contributor.author | Zheng, Z | |
dc.contributor.author | Fu, Q | |
dc.contributor.author | Luo, W | |
dc.date.accessioned | 2020-02-14T16:13:26Z | |
dc.date.issued | 2019-12-19 | |
dc.description.abstract | A typical Z-scheme system is composed of two photocatalysts which generate two sets of charge carriers and split water into H2 and O2 at different locations. Scientists are struggling to enhance the efficiencies of these systems by maximizing their light absorption, engineering more stable redox couples, and discovering new O2 and H2 evolutions co-catalysts. In this work, Au decorated WO3/g-C3N4 Z-scheme nanocomposites are fabricated via wet-chemical and photo-deposition methods. The nanocomposites are utilized in photocatalysis for H2 production and 2,4-dichlorophenol (2,4-DCP) degradation. It is investigated that the optimized 4Au/6% WO3/CN nanocomposite is highly efficient for production of 69.9 and 307.3 µmol h−1 g−1 H2 gas, respectively, under visible-light (λ > 420 nm) and UV–visible illumination. Further, the fabricated 4Au/6% WO3/CN nanocomposite is significant (i.e., 100% degradation in 2 h) for 2,4-DCP degradation under visible light and highly stable in photocatalysis. A significant 4.17% quantum efficiency is recorded for H2 production at wavelength 420 nm. This enhanced performance is attributed to the improved charge separation and the surface plasmon resonance effect of Au nanoparticles. Solid-state density functional theory simulations are performed to countercheck and validate our experimental data. Positive surface formation energy, high charge transfer, and strong non-bonding interaction via electrostatic forces confirm the stability of 4Au/6% WO3/CN interface. | en_GB |
dc.description.sponsorship | EPSRC | en_GB |
dc.identifier.citation | Vol. 12, No.7, article s40820 | en_GB |
dc.identifier.doi | 10.1007/s40820-019-0345-2 | |
dc.identifier.grantnumber | EP/P510956/1 | en_GB |
dc.identifier.grantnumber | EP/R512801/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/40871 | |
dc.language.iso | en | en_GB |
dc.publisher | SpringerOpen | en_GB |
dc.rights | © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | en_GB |
dc.subject | Polymeric g‑C3N4 | en_GB |
dc.subject | Plasmonic Au | en_GB |
dc.subject | Charge separation | en_GB |
dc.subject | Solar H2 production | en_GB |
dc.subject | DFT calculations | en_GB |
dc.title | Experimental and DFT studies of Au deposition over WO3/g‑C3N4 Z‑scheme heterojunction | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2020-02-14T16:13:26Z | |
dc.identifier.issn | 2311-6706 | |
dc.description | This is the final version. Available from SpringerOpen via the DOI in this record. | en_GB |
dc.identifier.eissn | 2150-5551 | |
dc.identifier.journal | Nano-Micro Letters | en_GB |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2019-11-25 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2020-01-01 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2020-02-14T16:08:22Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2020-02-14T16:13:33Z | |
refterms.panel | B | en_GB |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's licence is described as © The Author(s) 2019
Open Access
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.