dc.contributor.author | Duesberg, Georg | en |
dc.contributor.author | Coleman, Jonathan | en |
dc.contributor.author | Donegan, John | en |
dc.contributor.author | Nicolosi, Valeria | en |
dc.contributor.author | Mc Evoy, Niall | en |
dc.contributor.author | Mc Closkey, David | en |
dc.date.accessioned | 2015-09-17T11:45:40Z | |
dc.date.available | 2015-09-17T11:45:40Z | |
dc.date.issued | 2015 | en |
dc.date.submitted | 2015 | en |
dc.identifier.citation | Harvey A, Backes C, Gholamvand Z, Hanlon D, Mcateer D, Nerl H.C, Mcguire E, Seral-Ascaso A, Ramasse Q.M, Mcevoy N, Winters S, Berner N.C, Mccloskey D, Donegan J.F, Duesberg G.S, Nicolosi V, Coleman J.N, Preparation of gallium sulfide nanosheets by liquid exfoliation and their application as hydrogen evolution catalysts, Chemistry of Materials, 27, 9, 2015, 3483 - 3493 | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description | Export Date: 5 August 2015 | en |
dc.description.abstract | Here we demonstrate the production of large quantities of gallium sulfide (GaS) nanosheets by liquid exfoliation of layered GaS powder. The exfoliation was achieved by sonication of the powder in suitable solvents. The variation of dispersed concentration with solvent was consistent with classical solution thermodynamics and showed successful solvents to be those with Hildebrand solubility parameters close to 21.5 MPa1/2. In this way, nanosheets could be produced at concentrations of up to ~0.2 mg/ml with lateral sizes and thicknesses of 50-1000 nm and 3-80 layers, respectively. The nanosheets appeared to be relatively defect free although oxygen was observed in the vicinity of the edges. Using controlled centrifugation techniques, it was possible to prepare dispersions containing size-selected nanosheets. Spectroscopic measurements showed the optical properties of the dispersions to vary strongly with nanosheet size, allowing the elucidation of spectroscopic metrics for in-situ estimation of nanosheet size and thickness. These techniques allow the production of nanosheets with controlled sizes which will be important for certain applications. To demonstrate this, we prepared films of GaS nanosheets of three different sizes for use as hydrogen evolution electrocatalysts. We found a clear correlation between performance and size showing small nanosheets to be more effective. This is consistent with the catalytically active sites residing on the nanosheet edges. | en |
dc.description.sponsorship | The research leading to these results has received funding from the European Union Seventh Framework Programme under grant agreement n°604391 Graphene Flagship. We have also received support from the Science Foundation Ireland (SFI) funded centre AMBER (SFI/12/RC/2278). In addition, JNC acknowledges the European Research Council (SEMANTICS) and SFI (11/PI/1087) for financial support. CB acknowledges the German research foundation DFG (BA 4856/1-1). HCN, EMcG, AS-A and VN acknowledge ERC 2DNanoCaps, SFI PIYRA and FP7 MoWSeS. GSD, NCB and SW acknowledge SFI for PI_10/IN.1/I3030. NMcE acknowledges SFI (14/TIDA/2329). STEM experiments were performed at SuperSTEM, the EPSRC UK national facility for aberration-corrected STEM. | en |
dc.format.extent | 3483 | en |
dc.format.extent | 3493 | en |
dc.relation.ispartofseries | Chemistry of Materials | en |
dc.relation.ispartofseries | 27 | en |
dc.relation.ispartofseries | 9 | en |
dc.rights | Y | en |
dc.subject | gallium sulfide (GaS) nanosheets | en |
dc.subject.lcsh | gallium sulfide (GaS) nanosheets | en |
dc.title | Preparation of gallium sulfide nanosheets by liquid exfoliation and their application as hydrogen evolution catalysts | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/duesberg | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/dmcclosk | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/nicolov | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/colemaj | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/jdonegan | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/mcevoyni | en |
dc.identifier.rssinternalid | 105087 | en |
dc.identifier.doi | http://dx.doi.org/10.1021/acs.chemmater.5b00910 | en |
dc.rights.ecaccessrights | openAccess | |
dc.identifier.rssuri | http://www.scopus.com/inward/record.url?eid=2-s2.0-84929208159&partnerID=40&md5=03f7b59dbb76a9c4fb96d65e8ca544eb | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | SFI/12/RC/2278 | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | PI_10/IN.1/I3030 | en |
dc.identifier.uri | http://hdl.handle.net/2262/74604 | |