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article · IET Nanobiotechnology

Fungal xylanases‐mediated synthesis of silver nanoparticles for catalytic and biomedical applications

2018117 citationsOpen accessLadoke Akintola University of Technology

In plain language

Fungal xylanases can be utilised to synthesise silver nanoparticles with diverse functional properties. Analysis reveals that protein molecules cap and stabilise these spherical particles, which measure between 15.21 and 77.49 nanometres. Laboratory evaluations show that the resulting nanoparticles actively inhibit bacterial and fungal growth, demonstrating strong antimicrobial performance. They also exhibit significant antioxidant action through the scavenging of DPPH and hydrogen peroxide. Beyond biological inhibition, the particles function as catalysts capable of breaking down industrial dyes, specifically degrading malachite green and methylene blue. Tests using human blood samples further reveal remarkable anticoagulant and clot-dissolving, or thrombolytic, capabilities. Overall, the findings demonstrate an enzymatic biological route to produce multi-functional silver nanoparticles suitable for catalytic and medical uses.

Key takeaways

  • Fungal xylanases facilitate the successful synthesis and protein-mediated stabilisation of spherical silver nanoparticles.
  • The synthesised nanoparticles inhibit the growth of tested bacteria by up to 88.10 percent and fungi by up to 86.10 percent.
  • The particles exhibit notable antioxidant activity alongside the catalytic degradation of malachite green and methylene blue dyes.
  • Tests with human blood confirm that the nanoparticles possess potent anticoagulant and thrombolytic properties.

Why it matters

Using enzymes rather than harsh chemicals offers a biological route for producing functional nanomaterials. These laboratory-developed silver nanoparticles possess multiple properties in a single material, including the ability to eliminate microbes, reduce oxidative stress, dissolve blood clots, and break down toxic synthetic dyes. Such multi-functional capabilities could support improved biomedical interventions and cleaner methods for managing industrial waste.

Commercialisation angle

This work points towards potential applications in biomedical therapeutics, such as clot-busting or antimicrobial agents, and environmental remediation for industrial dye wastewater treatment. Potential users include developers of wound care products, cardiovascular therapies, and industrial water treatment systems. Based strictly on the reported laboratory syntheses, dye degradation, and in vitro blood assays, this technology remains at an early stage of research and requires extensive further testing before real-world adoption.

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Abstract

L2 (TEA) to synthesise silver nanoparticles (AgNPs). Characterisation of AgNPs was carried out using UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy, while their effectiveness as antimicrobial, antioxidant, catalytic, anticoagulant, and thrombolytic agents were determined. The colloidal AgNPs was brownish with surface plasmon resonance at 402.5 and 410 nm for NEA-AgNPs and TEA-AgNPs, respectively; while FTIR indicated that protein molecules were responsible for the capping and stabilisation of the nanoparticles. The spherical nanoparticles had size of 15.21-77.49 nm. The nanoparticles significantly inhibited the growth of tested bacteria (63.20-88.10%) and fungi (82.20-86.10%), and also scavenged DPPH (37.48-79.42%) and hydrogen peroxide (20.50-96.50%). In addition, the AgNPs degraded malachite green (78.97%) and methylene blue (25.30%). Furthermore, the AgNPs displayed excellent anticoagulant and thrombolytic activities using human blood. This study has demonstrated the potential of xylanases to synthesise AgNPs which is to the best of our knowledge the first record of such. The present study underscores the relevance of xylanases in nanobiotechnology.

Research topics

  • Nanoparticles: synthesis and applications
  • Graphene and Nanomaterials Applications

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DOI: 10.1049/iet-nbt.2017.0299

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