p-Phosphonated Calix[n]arene Stabilizes Superparamagnetic Nanoparticles for Nitrate and Phosphate Uptake
MetadataShow full item record
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.Highly faceted superparamagnetic magnetite nanoparticles roughly 11nm in diameter are readily accessible in the presence of p-phosphonated calix[n]arenes of different ring sizes (n=4, 5 and 6), through the use of a simple co-precipitation technique. In contrast, the larger calixarene affords spherical particles of comparable size. The maximum magnetization is 70-60emug-1, which decreases with increasing size of the calixarene macrocycle, and the evidence indicates that the calixarenes bind to the surface of the nanoparticles via the phosphonate head groups rather than the phenolic oxygen centers. The stabilized nanoparticles show dual functionality: they remove up to 62% of nitrate nitrogen and 48% of phosphate from an aqueous effluent after 24hours at concentrations of only 1gL-1 of calixarene-coated nanoparticles.
Showing items related by title, author, creator and subject.
Rajaeian, Babak (2012)Thin film composite (TFC) membranes have long been used by many large-scale applications (i.e., water and wastewater treatment). Recently, conventional polymeric TFC membranes are facing with short longevity due to high ...
Vellore Janarthanan, Mohanraj (2003)Delivery of complex molecules such as peptides, proteins, oligonucleotides and plasmids is an intensively studied subject, which has attracted considerable medical and pharmaceutical interest. Encapsulation of these ...
Murshidi, Julie Andrianny (2012)Concerns about the impact that fossil fuels have on the environment and their increasing price to the consumer have led to research being undertaken to evaluate and refine other energy carriers that will be comparable to ...