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A magnetically recoverable, efficient and selective copper based nanocatalyst has been synthesised via covalent grafting of 2-acetylthiophene on a silica coated magnetic nanosupport followed by metallation with copper acetate. The obtained organic-inorganic hybrid nanomaterial has been characterized by electron microscopy techniques (SEM and TEM with EDS), XRD, VSM, FT-IR and AAS. The catalytic performance of the novel nano-catalyst is evaluated in the active transformation of various aromatic amines to industrially-important alkylated amines. The nanocomposites afford high turnover frequency and high selectivity for amines under aerobic conditions. Furthermore, the heterogeneous nature of the catalyst allows easy magnetic recovery and regeneration, which makes the present protocol highly beneficial to address the industrial needs and environmental concerns. † Electronic supplementary information (ESI) available. See

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Novel and efficient acetoacetanilide functionalized Fe3O4 nanoparticles were synthesized for the selective and cyclic removal of Pb2+ ions.

A new and efficient manganese-based magnetic nanocatalyst has been developed via covalent grafting of the manganese acetylacetonate complex onto amine-functionalized silica-coated iron-core nanoparticles. The obtained nanomaterials were characterized by XRD, HRTEM, VSM, EDS, ICP-OES, and FT-IR. The resulting nanocatalyst was found to be efficient for selective oxidation of organic halides and alcohols to desirable carbonyl compounds in terms of excellent yields with high turnover number. The effortless magnetic recovery of the catalyst and its reusability renders the present strategy practical to address environmental and industrial issues.

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A new magnetically recoverable silica-based nickel nanocatalyst was synthesized, characterized and applied for the first time as a catalyst in Suzuki–Miyaura cross-coupling reaction.

Nanoscale zerovalent iron (nZVI) particles represent an important material for diverse environmental applications because of their exceptional electron‐donating properties, which can be exploited for applications such as reduction, catalysis, adsorption, and degradation of a broad range of pollutants. The synthesis and assembly of nZVI by using biological and natural sustainable resources is an attractive option for alleviating environmental contamination worldwide. In this Review, various green synthesis pathways for generating nZVI particles are summarized and compared with conventional chemical and physical methods. In addition to describing the latest environmentally benign methods for the synthesis of nZVI, their properties and interactions with diverse biomolecules are discussed, especially in the context of environmental remediation and catalysis. Future prospects in the field are also considered.