Facile phytosynthesis of gold nanoparticles-doped graphene oxide using Mangifera indica leaf extract: Characterization, antibacterial activity, and catalytic reduction of organic dyes

Dat, Nguyen Minh; Cong, Che Quang; Phuc, Nguyen Minh; Đạt, Nguyễn Tiến; Hương, Le Minh; Tai, Le Tan; Hải, Nguyễn Duy; Thinh, Doan Ba; Dat, Tran Do; Phong, Mai Thanh; Hieu, Nguyen Huu

doi:10.1016/j.mtsust.2022.100216

Cited by 7 publications

(4 citation statements)

References 66 publications

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“…After that, the existing electrons in the conduction band once again traveled to the surface of rGO and participated in multiple reactions to generate ROS, such as •O 2 − , •OH, playing an exquisite role in the breakdown of CV into various benign degraded products. The proposed mechanism also proves the enhanced photocatalytic traits of the MGTG-200 as compared to that of the bare MFO-GM-600, which can be attributed to the incorporation of TiO 2 and rGO, effectively extending the recombination rate of electron−hole pairs, and thereby improving the photodegradation process of CV molecules [32,47] . The whole photocatalysis scheme of MGTG-200 is described in Fig.…”

Section: Photocatalytic Degradation Of CVmentioning

confidence: 59%

“…8, upon the addition of TiO 2 and rGO, the adsorption and photodegradation efficiencies of all MGTG samples were improved noticeably as compared to those of the pristine MFO-GM-600. This can be ascribed to the incorporation of TiO 2 and rGO, which prolongs the recombination rate of the photogenerated electron-hole pairs, thereby enhancing the photocatalytic potential of the material [32,47] . Additionally, with the introduction of a substrate such as rGO, the MFO and TiO 2 nanoparticles can be uniformly distributed and this reduces their agglomeration, which provides smaller particle sizes that can more efficaciously interact with CV molecules [48] .…”

Section: Photocatalytic Degradation Of CVmentioning

confidence: 99%

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Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

Lin,

Cong,

Nam

et al. 2023

J. Semicond.

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In this study, three-dimensional porous magnesium ferrite/titanium dioxide/reduced graphene oxide (MgFe2O4-GM/TiO2/rGO (MGTG)) was successfully synthesized via green and hydrothermal-supported co-precipitation methods using the extract of Garcinia mangostana (G. mangostana) as a reducing agent. The characterization results indicate the successful formation of the nano/micro MgFe2O4 (MFO) and TiO2 on the structure of the reduced graphene oxide (rGO), which can also act as efficient support, alleviating the agglomeration of the nano/micro MFO and TiO2. The synergic effects of the adsorption and photodegradation activity of the material were investigated according to the removal of crystal violet (CV) under ultraviolet light. The effects of catalyst dosage, CV concentration, and pH on the CV removal efficiency of the MGTG were also investigated. According to the results, the CV photodegradation of the MGTG-200 corresponded to the pseudo-first-order kinetic model. The reusability of the material after 10 cycles also showed a removal efficiency of 92%. This happened because the materials can easily be recollected using external magnets. In addition, according to the effects of different free radicals ·O2 −, h+, and ·OH on the photodegradation process, the photocatalysis mechanism of the MGTG was also thoroughly suggested. The antibacterial efficiency of the MGTG was also evaluated according to the inhibition of the Gram-positive bacteria strain Staphylococcus aureus (S. aureus). Concurrently, the antibacterial mechanism of the fabricated material was also proposed. These results confirm that the prepared material can be potentially employed in a wide range of applications, including wastewater treatment and antibacterial activity.

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Section: Photocatalytic Degradation Of CVmentioning

confidence: 59%

Section: Photocatalytic Degradation Of CVmentioning

confidence: 99%

Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

Lin,

Cong,

Nam

et al. 2023

J. Semicond.

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“…The zeta potential distribution of the aqueous dispersions of SV and SV@rGO-EA MBs are shown in Figure 7c. At pH = 7, the net charge of SV was −30.9 mV, whereas the zeta potential value of SV@rGO-EA was −32.7 mV, confirming the stable combination of rGO-EA and the excellent suspension stability of SV@rGO-EA MBs at pH = 7 [36,37].…”

Section: Morphology and Zeta Potential Values Of Mbsmentioning

confidence: 69%

The Green Synthesis of Reduced Graphene Oxide Using Ellagic Acid: Improving the Contrast-Enhancing Effect of Microbubbles in Ultrasound

Cheng,

Wang,

Zhou

et al. 2023

Molecules

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There is an urgent need to realize precise clinical ultrasound with ultrasound contrast agents that provide high echo intensity and mechanical index tolerance. Graphene derivatives possess exceptional characteristics, exhibiting great potential in fabricating ideal ultrasound contrast agents. Herein, we reported a facile and green approach to synthesizing reduced graphene oxide with ellagic acid (rGO-EA). To investigate the application of a graphene derivative in ultrasound contrast agents, rGO-EA was dispersed in saline solution and mixed with SonoVue (SV) to fabricate SV@rGO-EA microbubbles. To determine the properties of the product, analyses were performed, including ultraviolet–visible spectroscopy (UV–vis), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), X-ray photoelectron spectrum (XPS), X-ray diffraction analysis (XRD) and zeta potential analysis. Additionally, cell viability measurements and a hemolysis assay were conducted for a biosafety evaluation. SV@rGO-EA microbubbles were scanned at various mechanical index values to obtain the B-mode and contrast-enhanced ultrasound (CEUS) mode images in vitro. SV@rGO-EA microbubbles were administered to SD rats, and their livers and kidneys were imaged in CEUS and B-mode. The absorption of rGO-EA resulted in an enhanced echo intensity and mechanical index tolerance of SV@rGO-EA, surpassing the performance of SV microbubbles both in vitro and in vivo. This work exhibited the application potential of graphene derivatives in the field of ultrasound precision medicine.

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“…The result confirms the successful synthesis of GO from graphite (Gi) as the Gi was oxidized to form multiple oxygen-derived functional groups. 31 The FT-IR analysis of SeMPs and Se/GO shows a slight shift in signals when compared to the result of GO. Moreover, the aforementioned functional groups experienced a dramatic reduction in intensity, which confirms the participation of the bio-molecules in the synthesis of Se/GO by electrostatic with the SeMP surface, further confirming the interlinking of SeMPs on the GO structure.…”

Section: Resultsmentioning

confidence: 95%

Selenium microparticles decorated graphene oxideviagreen synthesis usingPsidium guajavaleaves: preparation, characterization, and biological activities

Tuyen,

Thi Thanh Huong,

Duy

et al. 2023

New J. Chem.

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Facile phytosynthesis of gold nanoparticles-doped graphene oxide using Mangifera indica leaf extract: Characterization, antibacterial activity, and catalytic reduction of organic dyes

Cited by 7 publications

References 66 publications

Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

The Green Synthesis of Reduced Graphene Oxide Using Ellagic Acid: Improving the Contrast-Enhancing Effect of Microbubbles in Ultrasound

Selenium microparticles decorated graphene oxideviagreen synthesis usingPsidium guajavaleaves: preparation, characterization, and biological activities

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