Tannic acid/Fe3+ functionalized magnetic graphene oxide nanocomposite with high loading of silver nanoparticles as ultra-efficient catalyst and disinfectant for wastewater treatment

Yang, Wenshuai; Hu, Wenjihao; Zhang, Jiawen; Wang, Wenda; Cai, Ruiqi; Pan, Mingfei; Huang, Chia-Chi Flora; Chen, Xingzhen; Yan, Bin; Zeng, Hongbo

doi:10.1016/j.cej.2020.126629

Cited by 90 publications

(41 citation statements)

References 56 publications

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“…Nowadays, plant polyphenols have gained considerable attention to substitute synthetic polymers for the synthesis of bionanomaterial [ 24 , 25 , 26 ]. Different studies have been reported for the synthesis of core-shell nanoparticles by using plant polyphenols such as tea polyphenol and tannic acid.…”

Section: Introductionmentioning

confidence: 99%

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

et al. 2021

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The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of silver nanoparticles (Ag NPs) was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized Ag NPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) Ag NPs, capped with poly-tannic acid (Ag NPs-PTA). The average particle size of Ag NPs-PTA was found to be 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed to be stable for more than 15 months in the ambient environment (25 °C, 65% relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus (ZOI 3.0 mM) and Escherichia coli (ZOI 3.5 mM). Ag NPs-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s−1·mg−1. For comparison, bare Ag NPs show catalytic activity with a normalized rate constant of 139.78 mL·s−1·mg−1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The ultra-high catalytic and good antimicrobial properties can be attributed to the fine size and good aqueous stability of Ag NPs-PTA. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and medical.

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Section: Introductionmentioning

confidence: 99%

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

et al. 2021

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“…Though relatively novel, there are already such intelligent magnetic materials which have been examined for their adsorption performance in water and wastewater remediation (Yu et al 2020 ; Ciğeroğlu et al 2021 ; Leonel et al 2021 ; Yang et al 2021 ). Therefore, we think it is opportune to borrow insights from these repositories of scientific data to design and scale-up intelligent magnetic nanoadsorbents-based adsorption units for application in full-scale water purification and wastewater treatment systems.…”

Section: Developments With Magnetic Nanoadsorbents and Magnetic Separationmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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Pure water will become a golden resource in the context of the rising pollution, climate change and the recycling economy, calling for advanced purification methods such as the use of nanostructured adsorbents. However, coming up with an ideal nanoadsorbent for micropollutant removal is a real challenge because nanoadsorbents, which demonstrate very good performances at laboratory scale, do not necessarily have suitable properties in in full-scale water purification and wastewater treatment systems. Here, magnetic nanoadsorbents appear promising because they can be easily separated from the slurry phase into a denser sludge phase by applying a magnetic field. Yet, there are only few examples of large-scale use of magnetic adsorbents for water purification and wastewater treatment. Here, we review magnetic nanoadsorbents for the removal of micropollutants, and we explain the integration of magnetic separation in the existing treatment plants. We found that the use of magnetic nanoadsorbents is an effective option in water treatment, but lacks maturity in full-scale water treatment facilities. The concentrations of magnetic nanoadsorbents in final effluents can be controlled by using magnetic separation, thus minimizing the ecotoxicicological impact. Academia and the water industry should better collaborate to integrate magnetic separation in full-scale water purification and wastewater treatment plants.

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“…Silver nanoparticles (Ag NPs) in various kinds of catalytic reactions are highly stable and efficient, [12][13][14] and Ag NPs are favored by industrial production due to lower production costs compared to other noble metal nanometals (e.g. gold, platinum, palladium).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of silver nanocatalyst decorated Fe₃O₄@PDA core–shell nanoparticles with enhanced catalytic properties and selectivity

et al. 2022

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Tannic acid/Fe3+ functionalized magnetic graphene oxide nanocomposite with high loading of silver nanoparticles as ultra-efficient catalyst and disinfectant for wastewater treatment

Cited by 90 publications

References 56 publications

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Facile synthesis of silver nanocatalyst decorated Fe₃O₄@PDA core–shell nanoparticles with enhanced catalytic properties and selectivity

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Tannic acid/Fe3+ functionalized magnetic graphene oxide nanocomposite with high loading of silver nanoparticles as ultra-efficient catalyst and disinfectant for wastewater treatment

Cited by 90 publications

References 56 publications

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Facile synthesis of silver nanocatalyst decorated Fe3O4@PDA core–shell nanoparticles with enhanced catalytic properties and selectivity

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Facile synthesis of silver nanocatalyst decorated Fe₃O₄@PDA core–shell nanoparticles with enhanced catalytic properties and selectivity