Improving safety and efficiency in graphene oxide production technology

Le, Hon Nhien; Thai, Duong; Nguyen, Thuong T.; Dao, Bang Tam Thi; Nguyen, Trung Do; Tieu, Doanh Tu; Thuc, Chi Nhan Ha

doi:10.1016/j.jmrt.2023.04.050

Cited by 12 publications

(7 citation statements)

References 67 publications

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“…Graphite oxidation reaction was conducted using the synthetic procedure described in previous research literature [39]. In the synthesis, chemical ratios were optimized, including graphite : KMnO 4 = 1 : 2 (w/w), graphite : H 2 SO 4 = 1 : 30 (w/v) and water : H 2 SO 4 = 2.4 : 1 (v/v).…”

Section: Synthesis Of Graphene Oxide Nanosheetsmentioning

confidence: 99%

“…Materials weight and moisture were measured using an analytical balance (One Lab, FA2204, 220 g/0.1 mg) and a moisture analyzer (A&D Weighing, MX-50, 0.01% moisture content) respectively. Specific concentrations of nanomaterials in aqueous dispersions were prepared by the calculations of moisture contents and solid weights [39].…”

Section: Analytical Characterizationsmentioning

confidence: 99%

“…An instrument of Jasco V-670 spectrophotometer was used for ultraviolet-visible absorption spectroscopy (UV-vis) and also light transmittance spectroscopy. Optical band gap energy of nanomaterials was calculated by means of Tauc equation plots as reported in a previous research paper [39]. Scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) were analyzed with the system of JSM-IT200 instruments (JEOL).…”

Section: Analytical Characterizationsmentioning

confidence: 99%

“…The peak at 1381.8 cm −1 is assigned to N-O stretching that was derived from remaining nitrate precursor. FTIR spectrum of GO material includes the band of hydroxyl group (O-H stretching at 3385.4 cm −1 ) and the bands of carboxylic group (C=O stretching at 1714.4 cm −1 and C-O-H bending at 1383.7 cm −1 ) [39]. The…”

Section: Formation Of Zno Nanocrystals and Functional Groups In Go-zn...mentioning

confidence: 99%

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Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Le,

Nguyen,

Nguyen

et al. 2024

Nanotechnology

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Graphene oxide nanosheet (GO) is a multifunctional platform for binding with nanoparticles and stacking with two dimensional substrates. In this study, GO nanosheets were sonochemically decorated with zinc oxide nanoparticles (ZnO) and self-assembled into a hydrogel of GO-ZnO nanocomposite. The GO-ZnO hydrogel structure is a bioinspired approach for preserving graphene-based nanosheets from van der Waals stacking. X-ray diffraction analysis (XRD) showed that the sonochemical synthesis led to the formation of ZnO crystals on GO platforms. High water content (97.2 %) of GO-ZnO hydrogel provided good property of ultrasonic dispersibility in water. Ultraviolet-visible spectroscopic analysis (UV-Vis) revealed that optical band gap energy of ZnO nanoparticles (~ 3.2 eV) GO-ZnO nanosheets (~ 2.83 eV). Agar well diffusion tests presented effective antibacterial activities of GO-ZnO hydrogel against gram-negative bacteria (E. coli) and gram-positive bacteria (S. aureus). Especially, GO-ZnO hydrogel was directly used for brush painting on biodegradable polylactide (PLA) thin films. Graphene-based nanosheets with large surface area are key to van der Waals stacking and adhesion of GO-ZnO coating to the PLA substrate. The GO-ZnO/PLA films were characterized using photography, light transmittance spectroscopy, coating stability, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopic mapping (EDS), antibacterial test and mechanical tensile measurement. Specifically, GO-ZnO coating on PLA substrate exhibited stability in aqueous food simulants for packaging application. GO-ZnO coating inhibited the infectious growth of E. coli biofilm. GO-ZnO/PLA films had strong tensile strength and elastic modulus. As a result, the investigation of antibacterial GO-ZnO hydrogel and GO-ZnO coating on PLA film is fundamental for sustainable development of packaging and biomedical applications.

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Section: Synthesis Of Graphene Oxide Nanosheetsmentioning

confidence: 99%

Section: Analytical Characterizationsmentioning

confidence: 99%

Section: Analytical Characterizationsmentioning

confidence: 99%

Section: Formation Of Zno Nanocrystals and Functional Groups In Go-zn...mentioning

confidence: 99%

See 2 more Smart Citations

Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Le,

Nguyen,

Nguyen

et al. 2024

Nanotechnology

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“…Graphene oxide (GO) is a derivative of graphene. − The surface and edges of GO contain a large number of functional groups such as epoxy, hydroxyl, and carboxyl groups, which endow GO with new properties. , In addition, functional groups make GO have excellent hydrophilicity and high chemical compatibility and it is easy to compound with traditional materials to form new nanocomposites . Jing et al found that the large specific surface area of GO served as a template for the formation of concrete hydration products, and GO filled the microdefects of concrete, thereby improving mechanical properties and durability of concrete …”

Section: Introductionmentioning

confidence: 99%

Interlayer sp³ Bonds and Chirality at Bilayer Graphene Oxide/Calcium Silicate Hydrate Abnormally Enhance Its Interlayer Stress Transfer

Fan,

Song,

et al. 2024

ACS Omega

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Graphene oxide (GO) is an ideal reinforcing material with super design capability, which can achieve the combination of strength and toughness. However, the actual effect of GO is far below the theoretical prediction. This is mainly due to the weak interface between the nanofiller and the matrix. In this paper, a controllable method for improving interlayer stress transfer of double-layer graphene oxide/C−S−H (D-GO−CSH)layered nanostructures is proposed by using interlayer sp 3 bond and chirality. The results show that, compared with the control group, the normalized shear stress and normalized pull-out energy of the OH-sp3 model are increased by 44.93 and 49.25%, respectively, while those of the OO-sp3 model are increased by 32.26 and 31.03%, respectively. The interlayer sp 3 bonds lead to a great enhancement (more than 3 times) in normalized interlayer stress transfer of D-GO−CSH-layered nanostructures while exerting a little opposite effect (about 5%). The improvement effects induced by the interlayer sp 3 bonds are also strongly dependent on their distributions and the chirality of GO. According to the fracture mechanic theory and molecular dynamics results, the strain energy percentage difference (bond length and bond angle) of the zigzag-cen model is 34.8% lower than that of the control group model, which proves that the interlayer sp 3 bonds have a remarkably positive effect on the interlayer stress transfer of D-GO− CSH-layered nanostructures. This provides a new way to further improve the interlayer stress transfer, pull-out energy, and interlayer shear stress of D-GO−CSH-layered nanostructures.

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Production of Graphene and Its Derivatives

2024

Graphene

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Improving safety and efficiency in graphene oxide production technology

Cited by 12 publications

References 67 publications

Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Interlayer sp³ Bonds and Chirality at Bilayer Graphene Oxide/Calcium Silicate Hydrate Abnormally Enhance Its Interlayer Stress Transfer

Production of Graphene and Its Derivatives

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Improving safety and efficiency in graphene oxide production technology

Cited by 12 publications

References 67 publications

Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Sonochemical synthesis of bioinspired graphene oxide–zinc oxide hydrogel for antibacterial painting on biodegradable polylactide film

Interlayer sp3 Bonds and Chirality at Bilayer Graphene Oxide/Calcium Silicate Hydrate Abnormally Enhance Its Interlayer Stress Transfer

Production of Graphene and Its Derivatives

Contact Info

Product

Resources

About

Interlayer sp³ Bonds and Chirality at Bilayer Graphene Oxide/Calcium Silicate Hydrate Abnormally Enhance Its Interlayer Stress Transfer