Mesoporous hydroxyapatite

The development of novel materials for applications such as catalysis has been a very important area of work, with several classes of materials being developed and applied (for example, zeolites and their mesoporous analogues, hydrotalcites, hydroxyapatites, clays). 

A. Diaz, T. Lopez, J. Manjarrez, E. Basaldella, J. M. Martinez-Blanes, J. A. Odriozola Growth of hydroxyapatite in a biocompatible mesoporous ordered silica. Acta Biomaterialia, 2,173 (2006). 

The Heck and Suzuki reactions have been catalyzed by other NPs such as RuNPs, including alumina-supported RuNPs [43c]. Hydroxyapatite-supported RuNPs were recently found to be efficient and recyclable catalysts for cis-dihydroxlahon and oxidative cleavage of alkenes [43dj. Supported RuNPs in the pores of mesoporous Al-MCM-41 materials were prepared by Hj reduchon of adsorbed [Ru(NH3),s], and the activity in benzene hydrogenabon was studied in the absence and presence of 330ppm H2S in H2. By comparison, zeolite-supported catalysts were found to be more efficient when H2S was present [43dj. 

A.P.J. (2013) Magnetic mesoporous silica nanoparticles end-capped with hydroxyapatite for pH-responsive drug release./. Mater. Chem, B, 1 (37), 4828-4833. 

Because of the attractive physicochemical properties and potential applications in catalysis, biotechnology, adsorption, and separation, fabrication of hierarchically porous (macro/mesoporous) materials, especially for the three-dimensional ordered macro/ mesoporous (3DOM) materials, has been a focus in the research on materials science and engineering in recent years [99,199,200], By using close-packed arrays of monodisperse spheres, such as polystyrene (PS), poly(methyl methacrylate) (PMMA), and silica as template, metals [201,202], metal oxides [203-208], metal chalcogenides [209], silica [204,210,211], carbon [212,213], polymers [214,215], and hydroxyapatite [216] with 3DOM structures have been generated. 

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