Layered doublehydroxides efficient photocatalysts for degrading two industrial dyes.pdfVIP

L e G a I b a A R R A A K L P D A 1 s i r e b t f l b a m a a l r t o c c 0 dApplied Catalysis B: Environmental 107 (2011) 253– 259 Contents lists available at ScienceDirect Applied Catalysis B: Environmental jo ur n al homepage: www.elsev ier .com/ locate /apcatb ayered double hydroxides reconstructed in NiSO4 aqueous solution as highly fficient photocatalysts for degrading two industrial dyes abriela Carjaa,?, Elena Husanua, Carmen Gherasima, Horia Iovub Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, Technical University “Gh. Asachi” of Iasi, Bd. Mangeron no.71, asi 700554, Romania Polytechnic University of Bucharest, Faculty of Applied Chemistry and Materials Science, 149 Calea Victoriei, Bucharest 010072, Romania r t i c l e i n f o rticle history: eceived 15 April 2011 eceived in revised form 7 July 2011 ccepted 19 July 2011 vailable online 27 July 2011 eywords: a b s t r a c t Nanostructured photocatalysts, that can effectively photodegrade the industrial dyes drimaren red and drimaren navy (Clariant Produkte), were obtained by the structural reconstruction of MgAlLDH and MgFeAlLDH anionic clays in NiSO4 aqueous solution. X-ray diffraction (XRD), energy dispersive X-ray (EDX) mapping, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), N2 adsorption at 77 K and UV–vis analysis were adopted to investigate the structure, surface, micromorphology and photoresponsive properties of the recon-ayered double hydroxides hotodegradation yes nionic clay structed clays, as oposed to the as-synthesized clays. Results show that MgAlLDH and MgFeAlLDH reconstruction in NiSO4 aqueous solution gives rise to nanostructured enssembles defined by high den- sity nanoparticles of oxidized nickel deposited on the larger LD