Photocatalytic transformation of the antipsychotic drug risperidone in aqueous media on reduced graphene oxide—TiO 2 composites

Calza, Paola; Hadjicostas, Christos; Sakkas, Vasilios A.; Sarro, Marco; Minero, Claudio; Medana, Claudio; Albanis, Triantafyllos A.

doi:10.1016/j.apcatb.2015.10.010

Cited by 74 publications

(22 citation statements)

References 36 publications

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“…Antipsychotic, risperidone, was successfully removed from different water samples, including distilled, tap, river and lake water. TiO 2 /G nanocomposites enhanced the photodegradation of risperidone, compared to TiO 2 nanoparticles, in all tested samples and the effect was directly proportional to the G amount till 20%, as reported by Calza [190]. Chlortetracycline, a persistent antibiotic in aquatic environments, was successfully removed using TiO 2 /GO nanocomposites prepared by mixing TBT and GO dispersions in ethanol/water mixture.…”

Section: Photocatalytic Degradation Of Chemicals and Pharmaceuticalssupporting

confidence: 74%

Titanium Dioxide/Graphene and Titanium Dioxide/Graphene Oxide Nanocomposites: Synthesis, Characterization and Photocatalytic Applications for Water Decontamination

2018

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The use of titanium dioxide, TiO2 as a photocatalyst in water decontamination has witnessed continuous interest due to its efficiency, stability, low toxicity and cost-effectiveness. TiO2 use is limited by its large band gap energy leading to light absorbance in the UV region of the spectrum, and by the relatively fast rate of recombination of photogenerated electrons and positive holes. Both limitations can be mitigated by using carbon-TiO2 nanocomposites, such as those based on graphene (G) and graphene oxide (GO). Relative to bare TiO2, these nanocomposites have improved photocatalytic activity and stability under the UV–visible light, constituting a promising way forward for improved TiO2 photocatalytic performance. This review focuses on the recent developments in the chemistry of TiO2/G and TiO2/GO nanocomposites. It addresses the mechanistic fundamentals, briefly, of TiO2 and TiO2/G and TiO2/GO photocatalysts, the various synthesis strategies for preparing TiO2/G and TiO2/GO nanocomposites, and the different characterization techniques used to study TiO2/G and TiO2/GO nanocomposites. Some applications of the use of TiO2/G and TiO2/GO nanocomposites in water decontamination are included.

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Section: Photocatalytic Degradation Of Chemicals and Pharmaceuticalssupporting

confidence: 74%

Titanium Dioxide/Graphene and Titanium Dioxide/Graphene Oxide Nanocomposites: Synthesis, Characterization and Photocatalytic Applications for Water Decontamination

2018

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“…For practical applications, in fact, these latter studies are extremely important because with an incomplete photocatalytic treatment one may eventually produce a number of different smaller molecules that can even be potentially more dangerous than the known starting materials (Fig. 71) [448][449][450][451][452][453].…”

Section: Contaminant Degradationmentioning

confidence: 99%

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

104

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Titanates are salts of polytitanic acid that can be synthesized as nanostructures in a great variety concerning crystallinity, morphology, size, metal content and surface chemistry.Titanate nanotubes (open-ended hollow cylinders measuring up to 200 nm in length and 15 nm in outer diameter) and nanowires (solid, elongated rectangular blocks with length up to 1500 nm and 30-60 nm diameter) are the most widespread representatives of the titanate nanomaterial family. This review covers the properties and applications of these two materials from the surface science point of view. Dielectric, vibrational, electron and X-ray spectroscopic results are comprehensively discussed first, then surface modification methods including covalent functionalization, ion exchange and metal loading are covered. The versatile surface chemistry of onedimensional titanates renders them excellent candidates for heterogeneous catalytic, photocatalytic, photovoltaic and energy storage applications, therefore, these fields are also reviewed.

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“…TiO 2 /G and TiO 2 /GO nanocomposites have been produced by solvothermal [11], hydrothermal [12,13] and one-step colloidal blending [14] methods. These nanocomposites have been assessed for the degradation of pollutants, namely: methylene blue (under UV and visible-light irradiation) [12,14], risperidone (using artificial sunlight and visible radiation) [13], naphthenic acids [11] methyl orange and dimethyl phthalate [15] (both under UV irradiation). In these studies, high photocatalytic efficiency was found which was attributed to increasing adsorption of the pollutants onto the nanoparticles surface and to increased separation of charge carriers, which effectively inhibits recombination.…”

Section: Introductionmentioning

confidence: 99%

TiO 2 /graphene and TiO 2 /graphene oxide nanocomposites for photocatalytic applications: A computer modeling and experimental study

Martins

Ferreira

Silva

et al. 2018

Composites Part B: Engineering

115

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This work reports a computational study, focused on graphene (G) and graphene oxide (GO) interfaces with titanium dioxide (TiO 2), and an experimental assay on the photocatalytic activity of TiO 2 /G and TiO 2 /GO nanocomposites in the degradation of two different pollutants: methylene blue and ciprofloxacin. Both carbon nanostructures were compared due to their different chemical structure: GO is a G derivative with oxygen functional groups which should promote a closer chemical interaction with TiO 2 nanoparticles. Computational models of the fundamental properties of the composites indicated potentially improved photocatalytic activity compared to TiO 2 , namely lower band gaps and charge carrier segregation at the interfaces. These fundamental properties match qualitatively experimental results on methylene blue, which was more effectively degraded by TiO 2 /G and TiO 2 /GO nanocomposites than by pure TiO 2 under UV light. In contrast, the same nanocomposites were found to be less efficient to degrade ciprofloxacin than pure TiO 2 under visible and UV light. Therefore, this work showcases the relevance of an efficient matching between the catalyst and the molecular properties and structure of the pollutant.

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Photocatalytic transformation of the antipsychotic drug risperidone in aqueous media on reduced graphene oxide—TiO 2 composites

Cited by 74 publications

References 36 publications

Titanium Dioxide/Graphene and Titanium Dioxide/Graphene Oxide Nanocomposites: Synthesis, Characterization and Photocatalytic Applications for Water Decontamination

Titanium Dioxide/Graphene and Titanium Dioxide/Graphene Oxide Nanocomposites: Synthesis, Characterization and Photocatalytic Applications for Water Decontamination

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

TiO 2 /graphene and TiO 2 /graphene oxide nanocomposites for photocatalytic applications: A computer modeling and experimental study

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