Green Nanoarchitectonics Using Cleistocalyx Operculatus Leaf Extract in the Preparation of Multifunctional Graphene Oxide/Fe3O4/Ag Nanomaterials for Water Decontamination and Disinfection

Le, Thi Thu Huong; Ngo, Thi Thuong; Nguyen, Thi Hong Hanh; Pham, Trung Duc; Vu, Thi Xuan Huong; Vinh, Trần Quang

doi:10.1007/s10904-021-02164-1

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…The objective beyond the preparation of the materials was the systematic study of water disinfection as an application of the ability of graphene oxide to generate ROS. They showed that in this system, a reduction of more than 99% of fungi in wastewater was achieved after 60 min of treatment [200].…”

Section: Other Alternative Methods Of Fungi Disinfectionmentioning

confidence: 86%

Alternative and Classical Processes for Disinfection of Water Polluted by Fungi: A Systematic Review

Caicedo-Bejarano,

Morante-Caicedo,

Castro-Narváez

et al. 2024

Water

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The introduction of the first list of priority pathogenic fungi by the World Health Organization stresses the need to research and develop public health actions to mitigate infections caused by fungi. One of those actions involves the water disinfection systems, which comprise classical and alternative methods that have been developed in the last decades. Thereby, this work reviews the disinfection of fungi by classical methods such as chlorination, ozonation, and ultraviolet (UV) treatments and alternative advanced oxidation processes (AOPs) such as photo-Fenton, photocatalysis, or couplings of UV with peroxides. The matrices of aquatic systems (sewage, groundwater, drinking water, among others) were considered. A bibliometric analysis is performed initially, and then some aspects of the resistance to antifungals are presented, and the efficiency of the diverse processes in the reduction in fungal loading is also revised. Herein, it is shown the role of the disinfecting agents (e.g., chlorine, hydroxyl radical, or light) and their effects on fungi structures (e.g., direct DNA damage, or indirect damage due to the action of radicals). Moreover, gaps, such as the treatment of antifungal-resistant fungi and limited information about combinations among AOPs, related to the disinfection of water polluted by fungi, were identified.

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Section: Other Alternative Methods Of Fungi Disinfectionmentioning

confidence: 86%

Alternative and Classical Processes for Disinfection of Water Polluted by Fungi: A Systematic Review

Caicedo-Bejarano,

Morante-Caicedo,

Castro-Narváez

et al. 2024

Water

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“…The leaves of the Cleistocalyx operculatus tree contain phenolic compounds with antiviral 25 and antibacterial properties 26 . The initial extraction of C. operculatus leaves has been extensively studied as a chemical reducing agent for synthesizing various metal nanomaterials such as silver nanoparticles, 27 iron nanoparticles, 28 and selenium nanoparticles 29 . However, using C. operculatus leaf extract (COLE) as a reducing agent for synthesizing other metal nanomaterials such as copper nanoparticles has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and antibacterial activity of metallic copper‐chitosan nanomaterial using environmentally friendly Cleistocalyx operculatus leaf extract as a reducing agent

Pham,

Doan,

Nguyen

et al. 2024

Vietnam Journal of Chemistry

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The copper‐chitosan nanomaterial (CuNPs‐CTS) was effectively produced through a chemical reduction process employing Cleistocalyx operculatus leaf extract (COLE) as a reduction agent and chitosan as a stabilization agent. Both COLE and chitosan were derived from natural sources and are environmentally friendly. Various techniques including XRD, SEM, TEM, and DLS were used to characterize the samples. The findings revealed the exclusive presence of CuNPs metal when COLE was used as the reducing agent, while the presence of both metallic Cu and Cu2O was the result of using NaBH4. The CuNPs‐CTS material synthesized with COLE displayed CuNPs particles with diameters varying from 10 to 30 nm. CuNPs‐CTS materials were tested for their antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria. CuNPs‐CTS materials effectively inhibited the growth of these bacteria, significantly expanding the bacterial inhibition zone compared to the control sample (distilled water). The CuNPs‐CTS material using COLE exhibited a bacterial inhibition zone diameter of around 20 and 18 mm against S. aureus and E. coli, respectively. This surpassed the antibacterial performance of the CuNPs‐CTS material employing NaBH4 against S. aureus (18 mm).

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Post‐Adsorption Properties and Thermodynamic Adsorption Parameters of Various Graphene Oxide‐Based Materials

Le,

Ngo,

Han

et al. 2024

ChemistrySelect

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Graphene oxide (GO) and its composites have been widely studied for environmental applications, including for dye removal. In this study, various GO‐based materials namely GF, GFA, and GFC were successfully synthesized and characterized by FTIR, Raman spectroscopy, FESEM, BET, and TGA methods before and after being used to adsorb methylene blue from aqueous solutions. The BET results reveal that MB molecules most filled in the pores at the size of 100–300 nm of the materials. The adsorption process followed the pseudo‐first‐order equation and Sips isothermal model for all the materials. However, GFA showed the maximum adsorption capacity (Qmax=739 mg/g) and the most negative value of ΔG while the least effective material was GFC. The experiment revealed that GF and GFA could remove up to 95.0 % color on the real textile wastewater sample, and the materials are very promising for dye removal application.

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Green Nanoarchitectonics Using Cleistocalyx Operculatus Leaf Extract in the Preparation of Multifunctional Graphene Oxide/Fe3O4/Ag Nanomaterials for Water Decontamination and Disinfection

Cited by 6 publications

References 61 publications

Alternative and Classical Processes for Disinfection of Water Polluted by Fungi: A Systematic Review

Alternative and Classical Processes for Disinfection of Water Polluted by Fungi: A Systematic Review

Synthesis and antibacterial activity of metallic copper‐chitosan nanomaterial using environmentally friendly Cleistocalyx operculatus leaf extract as a reducing agent

Post‐Adsorption Properties and Thermodynamic Adsorption Parameters of Various Graphene Oxide‐Based Materials

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