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Zinc oxide nanoparticles:A highly efficient and readily recyclable catalyst for the synthesis of xanthenes

Chinese Chemical Letters 2012年第11期23卷 1225-1229页

作者： Javad Safaei-Ghomi mohammad ali ghasemzadeh Department of Organic Chemistry Faculty of ChemistryUniversity of Kashan

A novel and efficient route for the synthesis of 1,8-dioxooctahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes is described through one-pot multi-component reaction of dimedone and 2-naphthol with various aryl aldehydes using ZnO nanoparticles under solvent-free conditions. This method provides a novel and improved pathway for the synthesis of xanthenes in the terms of excellent yields, short reaction times, reusability and low catalyst loading.

关键词： ZnO nanoparticles Xanthene Solvent-free Multi-component reaction Heterogeneous catalysts

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Applications of nanomaterials in water treatment and environmental remediation

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Frontiers of Environmental Science & Engineering 2014年第4期8卷 471-482页

作者： Gholamreza ghasemzadeh Mahdiye MOMENPOUR Fakhriye OMIDI mohammad R. FIOSSEIN~ Monireh AHANI Abolfazl BARZEGARI Department of Agriculture Payame Noor University Tehran 19569 Iran Department of Environmental Biodiversity Lahijan Branch Islamic Azad University Lahijan *** Iran Department of Fisheries Agricultural Science & Natural Resources University Gorgan ***Iran Department of Environmental Science University of Pune Pune 411007 India Department of Agriculture Takestan Branch Islamic Azad University Takestan 18610307Iran Research Center for Pharmaceutical Nanotechnology Tabriz University of Medical Sciences Tabriz ***Iran

Nanotechnology has revolutionized plethora of scientific and technological fields; environmental safety is no exception. One of the most promising and well- developed environmental applications of nanotechnology has been in water remediation and treatment where different nanomaterials can help purify water through different mechanisms including adsorption of heavy metals and other pollutants, removal and inactivation of patho- gens and transformation of toxic materials into less toxic compounds. For this purpose, nanomaterials have been produced in different shapes, integrated into various composites and functionalized with active components. Nanomaterials have also been incorporated in nanostructured catalytic membranes which can in turn help enhance water treatment. In this article, we have provided a succinct review of the most common and popular nanomaterials （titania, carbon nanotubes （CNTs）, zero-valent iron, dendrimers and silver nanomaterials） which are currently used in environmental remediation and particularly in water purification. The catalytic properties and functionalities of the mentioned materials have also been discussed.

关键词： photocatalysis titania silver carbon nanotube zero-valent iron dendrimer

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