Band gap narrowing of SnS2 superstructures with improved hydrogen production
| Autor: | Guowei Li, Jiancun Rao, Graeme R. Blake, Petra Rudolf, Ren Su, Thomas Palstra, Jiquan Wu, Robert A. de Groot, Flemming Besenbacher |
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| Přispěvatelé: | Solid State Materials for Electronics, Surfaces and Thin Films |
| Rok vydání: | 2016 |
| Předmět: |
Nanostructure
Materials science LIGHT PHOTOCATALYTIC ACTIVITY Band gap HIERARCHICAL STRUCTURES chemistry.chemical_element Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry NANOSTRUCTURES 01 natural sciences Ion SENSING PROPERTIES Transition metal X-ray photoelectron spectroscopy NANOPARTICLES WATER General Materials Science FACETS Theoretical Chemistry Electronic Structure of Materials Renewable Energy Sustainability and the Environment business.industry General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences NANOCRYSTALS chemistry HIGH-PERFORMANCE LITHIUM ION BATTERIES Optoelectronics Lithium 0210 nano-technology business Visible spectrum |
| Zdroj: | Journal of Materials Chemistry A, 4, 209-216 Journal of Materials Chemistry A, 4(1), 209-216. Royal Society of Chemistry Journal of Materials Chemistry A, 4, 1, pp. 209-216 Li, G, Su, R, Rao, J, Wu, J, Rudolf, P, Blake, G R, de Groot, R A, Besenbacher, F & Palstra, T T M 2016, ' Band gap narrowing of Sns2 superstructures with improved hydrogen production ', Journal of Materials Chemistry A, vol. 4, no. 1, pp. 209-216 . https://doi.org/10.1039/c5ta07283b Journal of Materials Chemistry A, 4(1), 209-216. ROYAL SOC CHEMISTRY |
| ISSN: | 2050-7488 |
| DOI: | 10.1039/c5ta07283b |
| Popis: | Transition metal sulfides exhibit chemical and physical properties that are of much scientific and technological interest and can largely be attributed to their covalent bonding of 3d electrons. Hierarchical structures of these materials are suited for a broad range of applications in energy storage, as biological scaffold, and as sensors. In this work, hierarchical SnS2 structures have been synthesized and show excellent photocatalytic performance for the production of H-2 under blue light (450 nm) irradiation. A combination of high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy indicates the formation of layered SnS2/SnS superstructures with a lattice mismatch between the two alternating layers. This indicates the presence of S vacancies and results in a drastic decrease of the band gap by 0.3 eV compared to bulk SnS2. This strategy of self-narrowing of the bandgap demonstrates its great potential for the design of new materials with visible light reactivity. Finally, we have extended this strategy to the synthesis of other transition metal sulfides (Ni3S4, CuS, CuS@C, and FeS2) with similar hierarchical structures, which have potential applications such as supercapacitors and electrode materials for sodium/lithium ion batteries. |
| Databáze: | OpenAIRE |
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