Issue 18, 2012
From the journal:

Dalton Transactions

Bismuth oxychloride nanoflakes: Interplay between composition-structure and optical properties

L. Armelao,*a   G. Bottaro,*ab   C. Maccatoc  and  E. Tondelloc  

* Corresponding authors

a ISTM – CNR and INSTM, Department of Chemical Sciences University of Padova, Via F. Marzolo 1, Padova, Italy
E-mail: lidia.armelao@unipd.it

b IMIP – CNR Department of Chemistry University of Bari, Via E. Orabona 4, Bari, Italy
E-mail: gregorio.bottaro@cnr.it

c Department of Chemical Sciences and INSTM University of Padova, Via F. Marzolo 1, Padova, Italy

Abstract

Strongly (001) oriented BiOCl nanoflakes have been prepared at room temperature by the controlled hydrolysis of bismuth chloride in the presence of acetylacetone. The nanoflakes thermally treated in air up to 600 °C have been studied by X-Ray Photoelectron Spectroscopy (XPS), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Composition, structure and morphology of the nanoflakes have been correlated to their electronic absorption and luminescence properties. Irrespective of the thermal treatments, the samples are characterized by transmittance higher than 98% in the near-infrared region. In the mildly annealed specimen (≤ 200 °C), the absorption bands in the ultraviolet can be effectively exploited for the selective excitation of the blue (394 nm) and green (520 nm) photoluminescence, the latter being visible only for λexc > 310 nm. Conversely, at higher temperature only the blue emission is observed which, on the basis of the observed trend, can be assigned to emitting centres located in the oxide sheet of the Bi–O–Cl stacks.

Graphical abstract: Bismuth oxychloride nanoflakes: Interplay between composition-structure and optical properties

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Article information

DOI
https://doi.org/10.1039/C2DT12098D
Article type
Paper
Submitted
03 Nov 2011
Accepted
13 Dec 2011
First published
26 Jan 2012

Dalton Trans., 2012,41, 5480-5485

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Bismuth oxychloride nanoflakes: Interplay between composition-structure and optical properties

L. Armelao, G. Bottaro, C. Maccato and E. Tondello, Dalton Trans., 2012, 41, 5480 DOI: 10.1039/C2DT12098D

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