Sol-gel synthesis of hydrotalcite — like compounds

Paredes, S.P.; Fetter, Geolar; Bosch, P.; Bulbulian, S.

doi:10.1007/s10853-005-5347-4

Cited by 56 publications

(26 citation statements)

References 11 publications

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“…[105] A surface area of 288 m 2 /g was reportedly achieved by means of microwave irradiation. [106] Despite the advantages, an irradiation approach could also contribute to erosion of the hydrotalcite layers and render surface-defective sites with an increase in both basic and acid sites in the resulting LDHs when the solution precursor was aged by microwave irradiation. [25,96,107] …”

Section: Microwave Irradiationmentioning

confidence: 99%

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Othman

Helwani

Martunus

et al. 2009

Applied Organom Chemis

195

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In this paper, widely accepted methods of hydrotalcite preparation such as co-precipitation, urea hydrolysis, hydrothermal, sol-gel, microwave irradiation, steam activation and solvothermal have been selected and reviewed. Our review indicates that the nature of the divalent cations, the synthesis method, the calcination temperature and the nature of the interlayer species are determinant factors in shaping the surface properties of the layered double hydoxides. The basic strength of the surface base site and structural changes produced in the mixed oxides can be adjusted conveniently by varying the Al content during the synthesis. The combination of sol-gel with microwave irradiation during the gelling and crystallization steps has also been found to increase the surface area of the hydrotalcite-like compound.

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Section: Microwave Irradiationmentioning

confidence: 99%

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Othman

Helwani

Martunus

et al. 2009

Applied Organom Chemis

195

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“…The sol-gel method involves the hydrolysis of metal alkoxides and has been used for the preparation of hydrotalcites containing different M(II) and M(III) metals such as Cr/Ni [24], Zn/Al [25], Co/Al [26], Mg/Cr [27] and Al/Mg [28,29].…”

Section: Introductionmentioning

confidence: 99%

Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol–gel hydrotalcite-like compounds

Ramos-Ramírez

Ortega

Soto

et al. 2009

Journal of Hazardous Materials

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“…The relative modulus of these PNCs was, respectively, E R ¼ 1.4 and 1.7; relative elongation at break 0. 33 …”

Section: Ldh With Vinyl or Acrylic Polymersmentioning

confidence: 99%

“…Starting with Al-acetyl-acetonate and either Mg-ethoxide or Mg-acetyl-acetonate, LDHs with different characteristics are obtained. 33 3 Templated synthetic, using organic templates, which after synthesis may be pyrolyzed, or left in as intercalants (non-commercial). 17,18,34 As shown in Table 2, several types of synthetic clays have been synthesized.…”

Section: Introductionmentioning

confidence: 99%

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

382

252

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Synthetic, layered nano-particles for polymeric nanocomposites (PNC's)Utracki, L. A.; Sepehr, M.; Boccaleri, E.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site Web page / page Web http://dx.doi.org/10.1002/pat.852 http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi-synthetic layered materials are considered, namely the phyllosilicates (clays), silicic acid (magadiite), layered double hydroxides (LDHs), zirconium phosphates (ZrPs), and di-chalcogenides. The main advantage of synthetic clays is their chemical purity (e.g. absence of amorphous and gritty contaminants, as well as arsenic, iron, and other heavy metals), white to transparent color that assures reproducibly of brightly colored products, as well as a wide range of aspect ratios, p ¼ 20 to £6000. Several large scale production facilities have been established. The synthetic clay and LDH industries are oriented toward big volume markets: catalysis, foodstuff, cosmetics, pharmaceuticals, toiletry, etc. The use of these materials in PNCs is limited to synthetic clays and LDHs, mainly for reinforcement, permeability control, reduction of flammability, and stabilization, e.g. during dehydrohalogenation of chlorinated macromolecules. The use of lamellar ZrPs and di-chalcogenides is at the laboratory stage of functional polymeric systems development, e.g. for electrically conductive materials, catalysts or support for catalysts, in photochemistry, molecular and chiral recognition, or in fuel cell technologies, etc. Copyright # 2007 John Wiley & Sons, Ltd.KEYWORDS: polymeric nanocomposites; nanoparticles; clay; layered double hydroxides; matrix POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 2007; 18: 1-37 Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/pat.852 AUTHORS' BIOGRAPHIESDr Leszek A. Utracki was born and educated (up to Habilitation) in Poland. After the post-doctoral stage at USC in Los Angeles with Robert Simha he settled in Canada. His passionate research interest has been within the field of thermodynamics, rheology and processing of multicomponent, multiphase polymeric systems. During the 55 years in the profession he has published several hundred articles, book chapters, books, patents, etc., which has placed him on the ISI li...

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Sol-gel synthesis of hydrotalcite — like compounds

Cited by 56 publications

References 11 publications

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Adsorption isotherm studies of chromium (VI) from aqueous solutions using sol–gel hydrotalcite-like compounds

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

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