GO-Fe<sub>3</sub>O<sub>4</sub> Nanocomposite from coconut shell: Synthesis and characterization

Rukman, Nia Kurniaty; Jannatin, Miftakhul; Supriyanto, Ganden; Fahmi, Mochamad Zakki; Ibrahim, Wan Aini Wan

doi:10.1088/1755-1315/217/1/012008

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…Furthermore, the diffraction pattern confirmed the appearance of the GO-Fe3O4 composite. These results appropriate with the research [20], where the characteristic peak of the GO-Fe3O4 composite can be found at the angle of 26°. FTIR instrument Characterization used to confirm the binding or type of molecular functional groups present in GO and GO-Fe3O4 composites.…”

supporting

confidence: 90%

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Alfianti

Munasir

2021

JPSE

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Polysulfones are hydrophobic which can reduce membrane permeability. Permeability can be increased through the application of hydrophilic materials such as GO-Fe3O4 to the polysulfone membrane so that the membrane is hydrophilic. The riset purpose to determine the effect of the percentage weight of different material compositions on the hydrophilicity properties of the polysulfone membrane. Membrane fabrication is carried out using the phase inversion method where the polymer solution is molded in a place and immersed in a coagulation bath containing non-solvent. This solvent exchange causes the polymer to form a solid matrix and become a membrane. The results showed that GO particles were successfully doped with Fe3O4 material shown by XRD analysis at a peak of 35.61˚ with a magnetite phase, while FTIR analysis showed that there was an absorption band characteristic of Fe-O streching vibrations. The results of the contact angle test on the GO-Fe3O4/PSF membrane 0.75 wt per cent were around 73.17˚ which showed the smallest hydrophobic value and the membrane surface morphology had an average pore size of 333.61 nm so that the addition of GO-Fe3O4 composites could increase membrane hydrophilicity.

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supporting

confidence: 90%

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Alfianti

Munasir

2021

JPSE

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“…The sample was ground, and sieved to obtain a powder with a particle size of 75 μm using a 200 mesh siever. Then, the sample was washed with 40% hydrofluoric acid (HF) to remove the impurity compounds [ 33 , 34 ], and stirred with the sample to acid ratio of1:3 while maintained at 45 °C for 3 h. Then, the solution was washed with deionized water and NaOH until reaching pH of 6–7 and was dried in an oven at 110 °C for 12 h. The obtained graphite powder was characterized by XRD to obtain the phase composition of the sample.…”

Section: Methodsmentioning

confidence: 99%

Graphene oxide based coconut shell waste: synthesis by modified Hummers method and characterization

Sujiono

Zurnansyah

Zabrian

et al. 2020

Heliyon

109

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Graphene oxide (GO) based on coconut shell waste was successfully synthesized using a modified Hummers method, and the obtained GO was confirmed using XRD, FTIR, Raman spectroscopy, UV-Vis spectroscopy, and SEM-EDX. The XRD spectroscopy obtained the fractional content of the 2H graphite phase of 71.53%, 14.47% phosphorus, 10.02% calcium, and 3.97% potassium in coconut shell charcoal, where the GO sample tend to forms a phase of reduced graphene oxide (rGO). FTIR spectra shows compound functional groups of hydroxyl (- OH) at peak 1 (3449.92 cm −1 ), carboxyl (-COOH) at peak 2 (1719.42 cm −1 ) and peak 3 (1702.62 cm −1 ), and alcohol (C–OH) at peak 4 (1628.12 cm −1 ) and epoxy (CO) at peak 5 (1158.51 cm −1 ), which is similar to the GO synthesis from pure graphite. Raman spectroscopy analysis shows that the value of the I D /I G intensity ratio of the GO sample was 0.89 with a 2D single layer, and SEM results showed that surface morphology with an abundance of granular particles were found with different size distribution. The UV-visible results showed sufficient optical properties characterized by the spectrum, which formed because of the light absorption of the energy passed on the sample. The bandgap energy value of the sample obtained by the Tauc plot method was 4.38 eV, which indicates semiconductor properties.

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“…Moreover, the average size of Mal-NPs was approximately 10 nm, while Ct-NPs was about 230 nm (Figure S1). Figure c shows the XRD patterns, confirming the stable crystalline structure of Fe 3 O 4 . Notably, the half peak width of the Mal-NPs was significantly broader compared to the Ct-NPs.…”

Section: Resultsmentioning

confidence: 56%

“…Figure 1c shows the XRD patterns, confirming the stable crystalline structure of Fe 3 O 4 . 41 Notably, the half peak width of the Mal-NPs was significantly broader compared to the Ct-NPs. According to the Scherrer formula, a wider half peak width suggests smaller particle size, which is beneficial to interfacial interactions due to the larger specific surface area.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Boosting SARS-CoV-2 Enrichment with Ultrasmall Immunomagnetic Beads Featuring Superior Magnetic Moment

Tao

et al. 2023

Anal. Chem.

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The isolation and enrichment efficiency of SARS-CoV-2 virus in complex biological environments is often relatively low, presenting challenges in direct detection and an increased risk of false negatives, particularly during the early stages of infection. To address this issue, we have developed a novel approach using ultrasmall magnetosome-like nanoparticles (≤10 nm) synthesized via biomimetic mineralization of the Mms6 protein derived from magnetotactic bacteria. These nanoparticles are surface-functionalized with hydrophilic carboxylated polyethylene glycol (mPEG2000-COOH) to enhance water solubility and monodispersity. Subsequently, they are coupled with antibodies targeting the receptor-binding domain (RBD) of the virus. The resulting magnetosome-like immunomagnetic beads (Mal-IMBs) exhibit high magnetic responsiveness comparable to commercial magnetic beads, with a saturation magnetization of 90.6 emu/g. Moreover, their smaller particle size provides a significant advantage by offering a higher specific surface area, allowing for a greater number of RBD single-chain fragment variable (RBD-scFv) antibodies to be coupled, thereby enhancing immune capture ability and efficiency. To validate the practicality of Mal-IMBs, we evaluated their performance in recognizing the RBD antigens, achieving a maximum capture ability of 83 μg/mg per unit mass. Furthermore, we demonstrated the binding capability of Mal-IMBs to SARS-CoV-2 pseudovirus using fluorescence microscopy. The Mal-IMBs effectively enriched the pseudovirus at a low copy concentration of 70 copies/mL. Overall, the small Mal-IMB exhibited excellent magnetic responsiveness and binding efficiency. By employing a multisite virus binding mechanism, it significantly improves the enrichment and separation of SARS-CoV-2 in complex environments, facilitating rapid detection of COVID-19 and contributing to effective measures against its spread.

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GO-Fe₃O₄ Nanocomposite from coconut shell: Synthesis and characterization

Cited by 9 publications

References 25 publications

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Graphene oxide based coconut shell waste: synthesis by modified Hummers method and characterization

Boosting SARS-CoV-2 Enrichment with Ultrasmall Immunomagnetic Beads Featuring Superior Magnetic Moment

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GO-Fe3O4 Nanocomposite from coconut shell: Synthesis and characterization

Cited by 9 publications

References 25 publications

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method

Graphene oxide based coconut shell waste: synthesis by modified Hummers method and characterization

Boosting SARS-CoV-2 Enrichment with Ultrasmall Immunomagnetic Beads Featuring Superior Magnetic Moment

Contact Info

Product

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GO-Fe₃O₄ Nanocomposite from coconut shell: Synthesis and characterization