Novel magnetic graphene oxide decorated with persimmon tannins for efficient adsorption of malachite green from aqueous solutions

Gao, Mingmin; Wang, Zhongmin; Yang, Chengxian; Ning, Jinliang; Zhou, Zhide; Li, Guiyin

doi:10.1016/j.colsurfa.2019.01.016

Cited by 102 publications

(41 citation statements)

References 49 publications

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“…Tannin‐resins are good sequestrants of cationic dyes (known as basic dyes). Outstanding levels (close to 500 mg g −1 , Table ) are even reported for the uptake of methylene blue by tannin‐formaldehyde resins and for the adsorption of malachite green by magnetic graphene oxide decorated with persimmon tannins . In general, the uptake of dye is favored by increasing pH, which is explained by the electrostatic attraction between the positive charge of basic dyes and the negative charge of the adsorbent, which, as previously stated, tends to be negative at almost any pH .…”

Section: Adsorption Studiesmentioning

confidence: 60%

“…A silica shell protects the magnetic core and provides ease of functionalization, physical/chemical stability, and biocompatibility. Later, Gao et al . prepared magnetic graphene oxide decorated with persimmon tannin (Fe 3 O 4 /PT/GO) nanocomposites, which presented good magnetic properties under the action of an external magnetic field, before and after being used as an adsorbent.…”

Section: Synthesis Of Tannin‐adsorbentsmentioning

confidence: 99%

“…In general, the uptake of dye is favored by increasing pH, which is explained by the electrostatic attraction between the positive charge of basic dyes and the negative charge of the adsorbent, which, as previously stated, tends to be negative at almost any pH . In addition, π–π interaction between the benzene ring on the dye molecule and the benzene ring and C=O on adsorbent may be also involved in the adsorption mechanism . An enhancement of adsorption has been observed at higher temperatures …”

Section: Adsorption Studiesmentioning

confidence: 99%

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Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Santos

Bacelo

Boaventura

et al. 2019

Biotechnology Journal

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Biosorption is known as an effective way to clean‐up water from organic and inorganic contaminants and has also emerged as a promising technology to recover critical substances. Tannins are renewable materials, coming from multiple vegetable sources. A variety of biosorbents have been developed from tannins, including tannin resins, rigid foams, composites with mesoporous silica, cellulose, collagen, and magnetic adsorbents. These materials have shown an excellent ability to uptake heavy‐metal cations (Cd(II), Cu(II), Pb(II), Ni(II), Cr(III)), owning to the chelating ability provided by the plentiful adjacent hydroxyl groups. In addition, tannin‐adsorbents have shown exceptional ability to remove Cr(VI), and to uptake Au(III) and Pd(II) from strong acidic solutions, which has evident application in the recovery of precious metals from e‐wastes leaching. The fact that tannin‐adsorbents can reduce the oxidation state of these adsorbates to Cr(III) and to elemental species of Au and Pd is interesting. Adsorption of dyes, surfactants, pharmaceuticals and antimony is also feasible, but the removal of certain metalloid species, such as arsenic and phosphate, seems to be limited even after applying chemical modifications. This article presents a systematic review on the preparation of tannin‐adsorbents and their application in water decontamination and in the recovery of critical metals.

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Section: Adsorption Studiesmentioning

confidence: 60%

Section: Synthesis Of Tannin‐adsorbentsmentioning

confidence: 99%

Section: Adsorption Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Santos

Bacelo

Boaventura

et al. 2019

Biotechnology Journal

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“…Persimmon tannin has also been processed into a magnetic adsorbent composed of Fe 3 O 4 /PT/GO (GO, graphene oxide) for degradation of malachite green from aqueous solutions. The results demonstrated that the combination of electrostatic interaction and π-π interaction favors the performance of malachite green adsorption [ 27 ].…”

Section: Hybrid Materialsmentioning

confidence: 99%

“…Besides, condensed tannins are prone to feature a heterocyclic reactivity as they undergo hydrolysis (degradation) and autocondensation reactions (heterocyclic ring opening and subsequent nucleophilic addition to another tannin unit) in catalyzed conditions [ 3 ]. Moreover, non-covalent π-π interactions can occur between the tannins’ aromatic rings and other aromatic systems, such as graphene oxide [ 27 ]. However, the chemical reactivity of condensed tannins is discussed in greater detail elsewhere [ 3 , 6 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Tannin-Based Hybrid Materials and Their Applications: A Review

et al. 2020

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Tannins are eco-friendly, bio-sourced, natural, and highly reactive polyphenols. In the past decades, the understanding of their versatile properties has grown substantially alongside a continuously broadening of the tannins’ application scope. In particular, recently, tannins have been increasingly investigated for their interaction with other species in order to obtain tannin-based hybrid systems that feature advanced and/or novel properties. Furthermore, in virtue of the tannins’ chemistry and their high reactivity, they either physicochemically or physically interact with a wide variety of different compounds, including metals and ceramics, as well as a number of organic species. Such hybrid or hybrid-like systems allow the preparation of various advanced nanomaterials, featuring improved performances compared to the current ones. Consequently, these diverse-shaped materials have potential use in wastewater treatment or catalysis, as well as in some novel fields such as UV-shielding, functional food packaging, and biomedicine. Since these kinds of tannin-based hybrids represent an emerging field, thus far no comprehensive overview concerning their potential as functional chemical building blocks is available. Hence, this review aims to provide a structured summary of the current state of research regarding tannin-based hybrids, detailed findings on the chemical mechanisms as well as their fields of application.

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Magnetic Graphene Oxide and Its Composite Nanomaterials: Application in Environmental Decontamination

Chaudhary

Masram

2021

Environmental Applications of Carbon Nanomaterials‐Based Devices

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Novel magnetic graphene oxide decorated with persimmon tannins for efficient adsorption of malachite green from aqueous solutions

Cited by 102 publications

References 49 publications

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Tannin-Based Hybrid Materials and Their Applications: A Review

Magnetic Graphene Oxide and Its Composite Nanomaterials: Application in Environmental Decontamination

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