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A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
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Controlling In Planta Gold Nanoparticle Synthesis and Size for Catalysis.

Marc Loskarn1, Zakuan A S Harumain2,3, Jessica A Dobson2

  • 1Green Chemistry Centre of Excellence, Department of Chemistry, University of York, York YO10 5DD, U.K.

Environmental Science & Technology
|May 23, 2024
PubMed
Summary

Researchers engineered plants to produce gold nanoparticles (Au-NPs) for catalysis. This sustainable method uses plant tissues for biomass-derived catalysts, offering potential for mine waste remediation and valuable element recovery.

Keywords:
Arabidopsiscatalysisgoldmetalsnanoparticlespeptidesphytomining

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Area of Science:

  • Biotechnology and Nanomaterials Science
  • Environmental Remediation and Sustainable Chemistry

Background:

  • Gold nanoparticles (Au-NPs) are crucial industrial catalysts, typically synthesized chemically.
  • Plants can naturally accumulate gold, offering a route to biomass-derived catalysts.
  • Controlling Au-NP size and shape is key to optimizing catalytic performance.

Purpose of the Study:

  • To investigate the use of plants for synthesizing and controlling gold nanoparticles.
  • To enhance gold uptake in plants for biomass-derived catalyst production.
  • To explore the potential of plant-based gold recovery for environmental remediation.

Main Methods:

  • Introducing specific peptides into *Arabidopsis thaliana* to control nanoparticle synthesis within plant tissues.
  • Overexpressing the copper and gold COPPER TRANSPORTER 2 (COPT2) gene to increase metal uptake.
  • Pyrolyzing the engineered plant biomass to create catalysts and assessing their performance.

Main Results:

  • Peptides successfully regulated gold nanoparticle diameter within *Arabidopsis*.
  • Overexpression of COPT2 significantly increased gold and copper uptake in plants.
  • Plant-derived biomass demonstrated tunable catalytic properties after pyrolysis.

Conclusions:

  • Plants can be engineered to produce size-controlled gold nanoparticles for catalytic applications.
  • Enhanced metal uptake via COPT2 offers a strategy for increasing gold content in biomass.
  • This approach presents a sustainable pathway for valuable element recovery and mine waste valorization.