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Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
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Blue TiO2-Based Photocatalysis under Ambient Indoor Light for Prolonged Food Storage.

Kim My Tran1, Joosung Kim2, Hyun Ko3

  • 1Department of Chemistry, Sungkyunkwan University, 440746 Suwon, Republic of Korea.

ACS Applied Bio Materials
|February 20, 2025
PubMed
Summary

A novel blue titanium dioxide-tungsten trioxide-carboxymethyl cellulose (BTO-WO3-CMC) coating extends strawberry shelf life for 14 days. This device-free method uses photocatalysis to preserve food and combat waste.

Keywords:
BTOROS generationambient lightantibacterialfood preservationphotocatalyst

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Area of Science:

  • Materials Science
  • Food Science
  • Photocatalysis

Background:

  • Conventional food preservation methods are costly and compromise food quality.
  • Developing effective, device-free preservation techniques is crucial for reducing food waste.

Purpose of the Study:

  • To develop and evaluate a novel blue titanium dioxide-tungsten trioxide-carboxymethyl cellulose (BTO-WO3-CMC) photocatalyst coating for food preservation.
  • To assess the coating's efficacy in extending the shelf life of strawberries and its antibacterial properties.

Main Methods:

  • Fabrication of BTO-WO3-CMC coatings on inert substrates, enhanced with sodium silicate for adhesion.
  • Characterization using UV-Vis, XRD, SEM, AFM, and EDS.
  • Shelf-life testing of strawberries under ambient light and assessment of antibacterial activity against E. coli and S. aureus.

Main Results:

  • The BTO-WO3-CMC coating demonstrated enhanced visible light absorption and uniform surface properties.
  • Strawberry shelf life was extended to 14 days with an optimal 0.01 g, 4 μm thick coating.
  • The coating exhibited significant antibacterial activity against E. coli and S. aureus via ROS generation and was found to be nontoxic.

Conclusions:

  • The developed BTO-WO3-CMC photocatalyst coating offers a promising, device-free solution for extending food shelf life.
  • This technology presents a sustainable approach to reducing food waste.
  • The coating's efficacy and safety profile support its potential application in food preservation.