The adsorption behavior of C.I. Acid Blue 9 onto calcined Mg–Al layered double hydroxides

Auxilio, Anthony R., Andrews, Philip C., Junk, Peter C., and Spiccia, Leone (2009) The adsorption behavior of C.I. Acid Blue 9 onto calcined Mg–Al layered double hydroxides. Dyes and Pigments, 81 (2). pp. 103-112.

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Mesoporous calcined Mg–Al layered double hydroxides with different Mg/Al molar ratios were investigated for their ability to adsorb the commercial dye, C.I. Acid Blue 9, with a view to exploring their suitability as inorganic pigments in Ink Receptive Layer formulation. Uptake capacity was characterized using the Langmuir model and the resulting L-2/H-2 type plots indicated that the acid dye anions were adsorbed onto the surface by strong interactions. Optimum dye adsorption was achieved for a Mg/Al molar ratio ≈5.6. A surface adsorption mechanism is proposed to account for the adsorption of the dye onto the calcined Mg–Al layered double hydroxides. X-ray powder diffraction analysis indicated that given sufficient time it is possible to intercalate the dye within the layered double hydroxides' interlayer via a reconstruction mechanism. Scanning electron microscopy, N2 adsorption–desorption analysis and helium pycnometry were employed to examine the textural properties of the materials, which were correlated with their adsorption properties.

Item ID: 30790
Item Type: Article (Refereed Research - C1)
Keywords: layered double hydroxides; inorganic pigments; calcination; mesoporous materials; Acid Blue 9; adsorption; textural properties
ISSN: 1873-3743
Funders: Smartprint Cooperative Research Centre (CRC), Australia, Monash University
Date Deposited: 12 Jun 2014 06:19
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030299 Inorganic Chemistry not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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