Solvothermal synthesis of magnetically separable reduced graphene oxide/Fe3O4 hybrid nanocomposites with enhanced photocatalytic properties

Vinodhkumar, G.; Wilson, J.; Inbanathan, S.S.R.; Potheher, I. Vetha; Ashokkumar, Muthupandian; Péter, Á.

doi:10.1016/j.physb.2019.411752

Cited by 48 publications

(14 citation statements)

References 63 publications

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“…Particularly, hybrid heterostructure of α-Fe 2 O 3 with highly hydrophilic carbon dots has been recently reported as a photocatalyst to convert longer-wavelength radiation, e.g., NIR light, into shorter wavelengths, such as visible light, making them of great potential for water splitting [201] and pollutants degradation [202,203]. Similarly, hybrids formed by three-dimensional (3D)-reduced graphene oxide nanosheets containing Fe 3 O 4 nanoparticles have demonstrated superior electrochemical performance as supercapacitors electrode [204], as well as graphene/Fe 3 O 4 nanocomposites, showed improved photocatalytic activity [205,206]. Also, Cu x O-based heterostructures received great attention.…”

Section: Other Carbon-based/metal Oxide Hybridsmentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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Section: Other Carbon-based/metal Oxide Hybridsmentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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“…It has excellent photoelectric properties, thermal stability, mechanical properties, superparamagnetism, and a large specific surface area [ 23 , 24 ]. At the same time, magnetic particles can improve the dispersibility of graphene oxide in water, and the large surface area of graphene oxide can support a large number of magnetic nanoparticles to prevent their agglomeration [ 25 ]. In this study, MGO combined with SELEX technology (MGO-SELEX) was used to screen high-affinity aptamers of AFM1, while MGO combined with molecular docking was used to predict and analyze the binding site and recognition mechanism.…”

Section: Introductionmentioning

confidence: 99%

Selection and Characterization of DNA Aptamers for Constructing Aptamer-AuNPs Colorimetric Method for Detection of AFM1

Liu

Zhang

Sang

et al. 2022

Foods

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Aflatoxin M1 (AFM1), one of the most toxic mycotoxins, is a feed and food contaminant of global concern. To isolate the ssDNA aptamer of AFM1, synthesized magnetic graphene oxide nanomaterials, 12 rounds of subtractive systematic evolution of ligands by exponential enrichment (SELEX) selection were carried out. As a result, 24 candidate aptamers were selected, and their sequence similarity exceeded 97%. Their binding affinity and specificity were further examined by fluorescence and biofilm interferometry (BLI) methods. One aptamer (Apt-5) against AFM1 with a high affinity and specificity was isolated and demonstrated to be the optimal aptamer, whose dissociation constant reached the nanomolar level, Kd = 8.12 ± 1.51 nM. Additionally, molecular docking studies were used to predict the possible binding sites and mechanisms of the two. Based on Apt-5, an unlabeled aptamer-AuNPs colorimetric method was established to detect AFM1 in milk with a linear range of 0.078–10 ng/mL, and the actual detection limit was 0.078 ng/mL. These results demonstrated that this detection technique could be useful for the quantitative determination of AFM1 in milk and dairy products.

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“…In recent years, concerted efforts have been made to develop magnetite (Fe 3 O 4 ) nanocomposite materials with improved surface properties suitable for specific applications in diverse fields. As nontoxic, biocompatible, and superparamagnetic materials of relatively high chemical stability, Fe 3 O 4 nanocomposites find applications in biotherapy and biomedicine [ 1 , 2 ], drug targeting and delivery [ 3 , 4 ], catalysis [ 5 , 6 , 7 ], energy storage and release [ 8 , 9 ], environmental remediation [ 10 ], ultrafiltration membrane separation [ 11 ] and microwave absorption [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

Sani

Adnan

et al. 2021

Nanomaterials

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The influence of variable reaction time (tr) on surface/textural properties (surface area, total pore volume, and pore diameter) of carbon-encapsulated magnetite (Fe3O4@C) nanocomposites fabricated by a hydrothermal process at 190 °C for 3, 4, and 5 h was studied. The properties were calculated using the Brunauer–Emmett–Teller (BET) isotherms data. The nanocomposites were characterised using Fourier transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetry, and scanning and transmission electron microscopies. Analysis of variance shows tr has the largest effect on pore volume (F value = 1117.6, p value < 0.0001), followed by the surface area (F value = 54.8, p value < 0.0001) and pore diameter (F value = 10.4, p value < 0.001) with R2-adjusted values of 99.5%, 88.5% and 63.1%, respectively. Tukey and Fisher tests confirmed tr rise to have caused increased variations in mean particle sizes (11–91 nm), crystallite sizes (5–21 nm), pore diameters (9–16 nm), pore volume (0.017–0.089 cm3 g−1) and surface area (7.6–22.4 m2 g−1) of the nanocomposites with individual and simultaneous confidence limits of 97.9 and 84.4 (p-adj < 0.05). The nanocomposites’ retained Fe–O vibrations at octahedral (436 cm−1) and tetrahedral (570 cm−1) cubic ferrite sites, modest thermal stability (37–60% weight loss), and large volume-specific surface area with potential for catalytic application in advanced oxidation processes.

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Solvothermal synthesis of magnetically separable reduced graphene oxide/Fe3O4 hybrid nanocomposites with enhanced photocatalytic properties

Cited by 48 publications

References 63 publications

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Selection and Characterization of DNA Aptamers for Constructing Aptamer-AuNPs Colorimetric Method for Detection of AFM1

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

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