ZrO2/Fe2O3/RGO nanocomposite: Good photocatalyst for dyes degradation

Anjaneyulu, R. Balaji; Botsa, Sathish Mohan; Naidu, G. Parasuram; Muralikrishna, R.

doi:10.1016/j.physe.2018.12.007

Cited by 41 publications

(10 citation statements)

References 43 publications

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“…2 (b). Typical transmittance bands of GO at 3398, 1735 and 1622 cm −1 were ascribed to —OH stretching, the stretching vibration of —C O and the stretching vibration of aromatic C C, respectively [29] . As to the spectrum of GO-HAP, the stretching mode and librational mode of the structural —OH which appeared at 3569 and 632 cm −1 were not clearly observed, and the intensity of the peak for —C O decreased.…”

Section: Resultsmentioning

confidence: 99%

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

Shuai

Peng

Feng

et al. 2022

Journal of Advanced Research

150

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Section: Resultsmentioning

confidence: 99%

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

Shuai

Peng

Feng

et al. 2022

Journal of Advanced Research

150

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“…The electronic, magnetic, structural, optical, and photocatalytic properties of Fe 2 O 3 can be tuned by adjusting the amount of carbon added, leading us to a promising multifunctional material for electromagnetic wave absorption/shielding and textile industry wastewater degradation. The novelty and photodegradation efficiency of this study compared with other references − can clearly be seen in Table . The effect of AC concentration shows the highest efficiency as 93.76% for 20% AC but takes 120 min, compared with that of 25% AC, which is 89.51% but takes only 90 min.…”

Section: Resultsmentioning

confidence: 79%

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

et al. 2021

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Visible-light absorption is a critical factor for photocatalyst activity and absorption of electromagnetic (EM) interference application. The band gap of Fe 2 O 3 is 2 eV, which can be increased by doping with a high-band-gap material such as carbon from activated carbon (AC) with a band gap of 4.5 eV for increased visible-light absorption. The porosity decreases from 88 to 81.6%, and the band gap increases from 2.14 to 2.64 eV by increasing the AC from 10 to 25%, respectively. The photocatalytic activity takes 120 min to produce a harmless product for 10− 20% AC, but 25% AC shows 89.5% degradation in only 90 min and the potential to attenuate the EM wave up to 99% due to the RL being below −20 dB. The secondand third-cycle degradation achieved by the composite Fe 2 O 3 −AC having 25% AC is 88.2 and 86.5% in 90 min, respectively. The pore of the surface state of AC contains a trapped charge, and interaction occurs between the charge (electron/hole) and O 2 or H 2 O to produce OH and superoxide (O 2 − ) radicals. These radicals move inside the molecule of the pollutant (methylene blue (MB)) to break up the bond, with the final products being H 2 O and CO 2 . The X-ray photoelectron (XPS) spectra show that oxygen plays a key role in the interatomic bonding with Fe, C, and MB atoms. The best absorption of EM interference is −21.43 dB, with degradation reaching 89.51% in only 90 min for 25% AC due to its higher band gap and anisotropy constant. Fe 2 O 3 −carbon is a multifunctional material for the green environment because of its electromagnetic interference absorption and photodegradation of wastewater.

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“…rGO with superb electron transporting bridge works as best supporting material for the metal oxides which suppresses the electron hole pair recombination and renders the resulting nanocomposites with better catalytic efficiency (Sree et al, 2020). Due to the synergistic interaction between the rGO sheet with metal, metal oxide nanoparticles, these ternary nanocomposites exhibit improved properties and remarkable applications (Anjaneyulu et al, 2019). Recently, rGO‐based heterometallic oxides AgO·CuO·WO 3 nanocomposite was synthesized using sonication method and its catalytic efficiency against methylene blue dye was studied (Fatima et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Elucidating the structural, catalytic, and antibacterial traits of Ficus carica and Azadirachta indica leaf extract‐mediated synthesis of the Ag/CuO/rGO nanocomposite

Fayyaz,

Farrukh,

Ul‐Hamid

et al. 2024

Microscopy Res & Technique

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The present exploration demonstrates the efficient, sustainable, cost‐effective, and environment‐friendly green approach for the synthesis of silver (Ag)‐doped copper oxide (CuO) embedded with reduced graphene oxide (rGO) nanocomposite using the green one‐pot method and the green deposition method. Leaf extracts of Ficus carica and Azadirachta indica were used for both methods as reducing and capping agents. The effect of methodology and plant extract was analyzed through different characterization techniques such as UV‐visible spectroscopy, Fourier transform infrared (FT‐IR) spectroscopy, thermogravimetric analysis (TGA), x‐ray diffraction (XRD) analysis, scanning electron microscopy (SEM), high‐resolution transmission electron microscopy (HRTEM). The lowest band gap of 3.0 eV was observed for the Ag/CuO/rGO prepared by the green one‐pot method using F. carica. The reduction of graphene oxide (GO) and the formation of metal oxide was confirmed through functional group detection using FT‐IR. Calculation of thermodynamic parameters showed that all reactions involved were nonspontaneous and endothermic which shows the stability of nanocomposites. XRD studies revealed the crystallinity, phase purity and small average crystallite size of 32.67 nm. SEM images disclosed that the morphology of the nanocomposites was spherical with agglomeration and rough texture. The particle size of the nanocomposites calculated through HRTEM was found in agreement with the XRD results. The numerous properties of the synthesized nanocomposites enhanced their potential against the degradation of methylene blue, rhodamine B, and ciprofloxacin. The highest percentage degradation of Ag/CuO/rGO was found to be 97%, synthesized using the green one‐pot method with F. carica against ciprofloxacin, which might be due to the lowest band gap, delayed electron–hole pair recombination, and large surface area available. The nanocomposites were also tested against the Gram‐positive and Gram‐negative bacteria.Research Highlights Facile synthesis of Ag/CuO/rGO nanocomposite using a green one‐pot method and the green deposition method. The lowest band gap of 3.0 eV was observed for nanocomposite prepared by a green one‐pot method using Ficus carica. Least average crystallite size of 32.67 nm was found for nanocomposite prepared by a green one‐pot method using F. carica. Highest antibacterial and catalytic activity (97%) was obtained against ciprofloxacin with nanocomposite prepared through green one‐pot method using F. carica. A mechanism of green synthesis is proposed.

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ZrO2/Fe2O3/RGO nanocomposite: Good photocatalyst for dyes degradation

Cited by 41 publications

References 43 publications

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Elucidating the structural, catalytic, and antibacterial traits of Ficus carica and Azadirachta indica leaf extract‐mediated synthesis of the Ag/CuO/rGO nanocomposite

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ZrO2/Fe2O3/RGO nanocomposite: Good photocatalyst for dyes degradation

Cited by 41 publications

References 43 publications

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

In situ synthesis of hydroxyapatite nanorods on graphene oxide nanosheets and their reinforcement in biopolymer scaffold

Enhanced Visible-Light Absorption of Fe2O3 Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

Elucidating the structural, catalytic, and antibacterial traits of Ficus carica and Azadirachta indica leaf extract‐mediated synthesis of the Ag/CuO/rGO nanocomposite

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Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties