Semiconducting properties of layered cadmium sulphide-based hybrid nanocomposites
López Cabaña, Zoraya (Centro para el Desarrollo de la Nanociencia y la Nanotecnología (Chile))
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
González, Guillermo (Centro para el Desarrollo de la Nanociencia y la Nanotecnología (Chile))

Date:	2011
Abstract:	A series of hybrid cadmium salt/cationic surfactant layered nanocomposites containing different concentrations of cadmium sulphide was prepared by exchanging chloride by sulphide ions in the layered precursor CdX (OH) (CnTA) in a solid phase/gas reaction, resulting in a series of layered species exhibiting stoichiometries corresponding to CdS X (OH) (CnTA) , constituted by two-dimensional CdCl /CdS ultra-thin sheets sandwiched between two self-assembled surfactant layers. The electronic structure of CdS in the nanocomposite is similar to that of bulk, but showing the expected features of two-dimensional confinement of the semiconductor. The nanocomposite band gap is found to depend in a non-linear manner on both the length of the hydrocarbon chain of the surfactant and the concentration of the sulphide in the inorganic sheet. The products show photocatalytic activity at least similar and usually better than that of "bulk" CdS in a factor of two.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Cadmium salts ; CdS ; Hybrid nanocomposites ; Hydrocarbon chains ; Layered precursors ; Photocatalytic activities ; Self-assembled ; Semi-conducting property ; Solid-phase ; Sulphide ions ; Surfactant layers ; Two-dimensional confinement ; Ultra-thin
Published in:	Nanoscale research letters, Vol. 6 (September 2011) , art. 523, ISSN 1556-276X

DOI: 10.1186/1556-276X-6-523
PMID: 21896162

8 p, 2.0 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles