Dataset Information

Enhancement of TiO? NPs Activity by Fe?O? Nano-Seeds for Removal of Organic Pollutants in Water.

ABSTRACT: The enhancement of the photocatalytic activity of TiO? nanoparticles (NPs), synthesized in the presence of a very small amount of magnetite (Fe?O?) nanoparticles, is here presented and discussed. From X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses, the crystallinity of TiO? nanoparticles (NPs) seems to be affected by Fe?O?, acting as nano-seeds to improve the tetragonal TiO? anatase structure with respect to the amorphous one. Photocatalytic activity data, i.e., the degradation of methylene blue and the Ofloxacin fluoroquinolone emerging pollutant, give evidence that the increased crystalline structure of the NPs, even if correlated to a reduced surface to mass ratio (with respect to commercial TiO? NPs), enhances the performance of this type of catalyst. The achievement of a relatively well-defined crystal structure at low temperatures (T_max = 150 °C), preventing the sintering of the TiO? NPs and, thus, preserving the high density of active sites, seems to be the keystone to understand the obtained results.

SUBMITTER: Villa S

PROVIDER: S-EPMC5457040 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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Enhancement of TiO₂ NPs Activity by Fe₃O₄ Nano-Seeds for Removal of Organic Pollutants in Water.

Villa Silvia S Caratto Valentina V Locardi Federico F Alberti Stefano S Sturini Michela M Speltini Andrea A Maraschi Federica F Canepa Fabio F Ferretti Maurizio M

Materials (Basel, Switzerland) 20160910 9

The enhancement of the photocatalytic activity of TiO₂ nanoparticles (NPs), synthesized in the presence of a very small amount of magnetite (Fe₃O₄) nanoparticles, is here presented and discussed. From X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses, the crystallinity of TiO₂ nanoparticles (NPs) seems to be affected by Fe₃O₄, acting as nano-seeds to improve the tetragonal TiO₂ anatase structure with respect to the amorphous one. Photocatalytic activity data, i.e., the ...[more]

PMID: 28773892

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Project description:Currently, a serious threat for living organisms and human life in particular, is water contamination with persistent organic and inorganic pollutants. To date, several techniques have been adopted to remove/treat organics and toxic contaminants. Adsorption is one of the most effective and economical methods for this purpose. Generally, porous materials are considered as appropriate adsorbents for water purification. Conventional adsorbents such as activated carbons have a limited possibility of surface modification (texture and functionality), and their adsorption capacity is difficult to control. Therefore, despite the significant progress achieved in the development of the systems for water remediation, there is still a need for novel adsorptive materials with tunable functional characteristics. This review addresses the new trends in the development of new adsorbent materials. Herein, modern carbon-based materials, such as graphene, oxidized carbon, carbon nanotubes, biomass-derived carbonaceous matrices-biochars as well as their composites with metal-organic frameworks (MOFs) and MOF-derived highly-ordered carbons are considered as advanced adsorbents for removal of hazardous organics from drinking water, process water, and leachate. The review is focused on the preparation and modification of these next-generation carbon-based adsorbents and analysis of their adsorption performance including possible adsorption mechanisms. Simultaneously, some weak points of modern carbon-based adsorbents are analyzed as well as the routes to conquer them. For instance, for removal of large quantities of pollutants, the combination of adsorption and other methods, like sedimentation may be recommended. A number of efficient strategies for further enhancing the adsorption performance of the carbon-based adsorbents, in particular, integrating approaches and further rational functionalization, including composing these adsorbents (of two or even three types) can be recommended. The cost reduction and efficient regeneration must also be in the focus of future research endeavors. The targeted optimization of the discussed carbon-based adsorbents associated with detailed studies of the adsorption process, especially, for multicomponent adsorbate solution, will pave a bright avenue for efficient water remediation.

Dataset Information

Enhancement of TiO? NPs Activity by Fe?O? Nano-Seeds for Removal of Organic Pollutants in Water.

Publications

Enhancement of TiO₂ NPs Activity by Fe₃O₄ Nano-Seeds for Removal of Organic Pollutants in Water.

Similar Datasets

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