Synthesis and improved photoactivity of magnetic quaternary nanocomposites consisting of Fe3O4@ZnO core@shell nanoparticles decorated on graphene-oxide grafted poly-citric acid

Dehghani-Dashtabi, Mahdieh; Hekmatara, Hoda; Seyed-Yazdi, Jamileh

doi:10.1016/j.physb.2018.10.020

Cited by 21 publications

(10 citation statements)

References 45 publications

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“…In the ternary nanocomposite, no other phases had been observed, which approves the purity of the synthesized substance. The mean crystalline size of nanocomposites was measured applying the formula of Scherrer, 48 and the obtained values were 8.17 and 6.85 nm for CeO 2 @TiO 2 and TiO 2 @CeO 2 structures, respectively. The crystal size of core–shell nanospheres was calculated and is shown in Table 1 .…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6 a,e depicts the oxidative Ce 3d 5/2 peaks at 889.25 and 882.39 eV as features of the oxidation mode of Ce 4+ ions, Ce 3d 9 4f 1 O 2p 5 , and Ce 3d 9 4f 2 O 2p 4 , respectively. 48 Figure 6 c,f represents the oxidative state and chemical nature of Ti 4+ ions. The oxidation peaks exhibited at 462 and 466.5 eV are related to the oxidation mode of binding energy for Ti 2p 1/2 and Ti 2p 3/2 representing that Ti 4+ ions are present with octahedral oxygen coordination.…”

Section: Resultsmentioning

confidence: 99%

“… 47 Previous studies have illustrated that combining mineral materials with graphene improved their photocatalytic activities. 48 Thus, the integration of core–shell structures with graphene would enhance the performance of organic pollutant degradation and result in the increment of the photocatalytic properties. There are several reports on different biological applications of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

et al. 2022

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Development of light-harvesting properties and inhibition of photogenerated charge carrier recombination are of paramount significance in the photocatalytic process. In the present work, we described the synthesis of core–shell heterostructures, which are composed of titanium oxide (TiO 2 ) and cerium oxide (CeO 2 ) deposited on a reduced graphene oxide (rGO) surface as a conductive substrate. Following the synthesis of ternary rGO-CeO 2 @TiO 2 and rGO-TiO 2 @CeO 2 nanostructures, their photocatalytic activity was investigated toward the degradation of rhodamine B dye as an organic pollutant under UV light irradiation. The obtained structures were characterized with high-resolution transmission electron microscopy, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy surface analysis, and UV–Vis spectroscopy. Various parameters including pH, catalyst dosage, temperature, and contact time were studied for photocatalysis optimization. Heterostructures showed considerable advantages because of their high surface area and superior photocatalytic performance. In contrast, rGO-CeO 2 @TiO 2 showed the highest photocatalytic activity, which is attributed to the more effective electron–hole separation and quick suppression of charge recombination at core–shell phases. A biological assay of the prepared heterostructure was performed to determine the cytotoxicity against breast cancer cells (MCF-7) and demonstrated a very low survival rate at 7.65% of cells at the 17.5 mg mL –1 concentration of applied photocatalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

et al. 2022

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“…In conclusion, the quaternary nanocomposite provides the highest photocatalytic activity. Therefore, it can be used in nanomedical applications because of its biocompatibility [42]. As we know, the CA is a biodegradable, cheap, plus biocompatible compound.…”

Section: Ca-based Branched Polymer Nanoconjugatesmentioning

confidence: 99%

Pharmaceutical applications of citric acid

et al. 2021

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Background Citric acid (CA) is a universal plant and animal-metabolism intermediate. It is a commodity chemical processed and widely used around the world as an excellent pharmaceutical excipient. Notably, CA is offering assorted significant properties viz. biodegradability, biocompatibility, hydrophilicity, safety, etc. Therefore, CA is broadly employed in many sectors including foodstuffs, beverages, pharmaceuticals, nutraceuticals, and cosmetics as a flavoring agent, sequestering agent, buffering agent, etc. From the beginning, CA is a regular ingredient for cosmetic pH-adjustment and as a metallic ion chelator in antioxidant systems. In addition, it is used to improve the taste of pharmaceuticals such as syrups, solutions, elixirs, etc. Furthermore, free CA is also employed as an acidulant in mild astringent preparations. Main text In essence, it is estimated that the functionality present in CA provides excellent assets in pharmaceutical applications such as cross-linking, release-modifying capacity, interaction with molecules, capping and coating agent, branched polymer nanoconjugates, gas generating agent, etc. Mainly, the center of attention of the review is to deliver an impression of the CA-based pharmaceutical applications. Conclusion In conclusion, CA is reconnoitered for multiple novels pharmaceutical and biomedical/applications including as a green crosslinker, release modifier, monomer/branched polymer, capping and coating agent, novel disintegrant, absorption enhancer, etc. In the future, CA can be utilized as an excellent substitute for pharmaceutical and biomedical applications. Graphical abstract

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“…Among several efficient efforts applied to reduce the mentioned drawbacks, developing ZnO-based heterojunc-tion with different bandgap materials was obtained to be one of the preferences [6]. Depending on the magnetic property, stability, and high surface area to volume ratio property, iron and manganese oxides are reported to be promising materials [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of PVA-Assisted Metal Oxide Nanomaterials: Surface Area, Porosity, and Electrochemical Property Improvement

Abebe

Murthy

Zereffa

et al. 2020

Journal of Nanomaterials

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The poly(vinyl alcohol)-assisted sol-gel-self-propagation route has been used for the synthesis of porous binary metal oxide nanocomposites (BMONCs) and ternary metal oxide nanocomposites (TMONCs). The effects of synthesis techniques, precursor’s type, amount of PVA loading, and precursor’s percentage were studied. The optical, chemical bonding, crystallinity, morphological, textural, and electrochemical properties of the synthesized materials were characterized by UV-vis-DRS/UV-vis, FT-IR, XRD, SEM/EDX and TEM/HRTEM/SAED, BET, and CV/EIS techniques, respectively. The porous nature of the materials was confirmed by SEM, BET, and SAED analytical techniques. Using XRD and TEM analysis, the approximate particle size of the materials was confirmed to be in the nanometer range (~7-70 nm). The EDX and HRTEM analysis was confirming the presence of predictable composition and actuality of the composites, respectively. Moving from bare ZnO to ternary nanocomposites, the great morphological, surface area, and electrochemical property enhancement was confirmed. The charge transfer capability order was obtained to be ZnO/Fe2O3/Mn2O3 > ZnO/Fe2O3 > ZnO/Mn2O3 > ZnO. The respective approximate electron transfer resistance value is 7, 25, 61, and 65 Ω. Therefore, this work can improve the toxicity towards solvent used, surface area to volume ratio, and aggregation/agglomeration problem and also enhance the charge transfer capability due to the heterojunction.

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Synthesis and improved photoactivity of magnetic quaternary nanocomposites consisting of Fe3O4@ZnO core@shell nanoparticles decorated on graphene-oxide grafted poly-citric acid

Cited by 21 publications

References 45 publications

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Pharmaceutical applications of citric acid

Synthesis and Characterization of PVA-Assisted Metal Oxide Nanomaterials: Surface Area, Porosity, and Electrochemical Property Improvement

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Synthesis and improved photoactivity of magnetic quaternary nanocomposites consisting of Fe3O4@ZnO core@shell nanoparticles decorated on graphene-oxide grafted poly-citric acid

Cited by 21 publications

References 45 publications

Fabrication of Graphene-Based TiO2@CeO2 and CeO2@TiO2 Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO2@CeO2 and CeO2@TiO2 Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Pharmaceutical applications of citric acid

Synthesis and Characterization of PVA-Assisted Metal Oxide Nanomaterials: Surface Area, Porosity, and Electrochemical Property Improvement

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Product

Resources

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity