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Nanotechnology

Breakthrough in Nanotechnology: Superamphiphobic Self-Cleaning Coating for NO Degradation

Strategic Insights

— 1 min read

Scientists at Chang'an University in Shaanxi, People's Republic of China, have successfully developed a superamphiphobic self-cleaning coating with photocatalytic properties, significantly enhancing the degradation of nitric oxide (NO) in a sustainable and efficient manner. This innovative coating, fabricated using a layer-by-layer spray method, exhibits remarkable superhydrophobicity, superior self-cleaning properties, and exceptional chemical stability, ensuring its effectiveness in various environmental applications.

Key Takeaways:

  • The coating is composed of a BiOBr nanomaterial with a hollow microsphere structure, prepared through ethylenediaminetetraacetic acid (EDTA) assisted morphology control.
  • The superamphiphobic coating demonstrates superior superhydrophobicity, with a water contact angle of 164.2 degrees and an olive oil contact angle of 151.5 degrees.
  • The coating exhibits remarkable chemical stability, with a water contact angle remaining above 150 degrees even after soaking in 10% aqueous solutions of NaCl, HCl, and NaOH for 48 hours.
  • The NO degradation rate of the coating reached 61.2%, outperforming conventional photocatalysts.
  • The coating presents a low NO2 conversion rate and demonstrates a sustainable and efficient long-term NO purification and degradation mechanism.
  • The design method and application of this coating are expected to have a positive impact on the purification treatment of automobile exhaust inside tunnels.
  • Additional authors of this research include Ningning Li, Minjie Yan, Wenshuo Zhang, Lifang Song, and Liying Cui.

Statistics:

  • 61.2% NO degradation rate achieved by the superamphiphobic coating.
  • Water contact angle of the coating: 164.2 degrees.
  • Olive oil contact angle of the coating: 151.5 degrees.
  • Time duration: 48 hours (soaking in 10% aqueous solutions of NaCl, HCl, and NaOH).
  • NO2 conversion rate: low.
  • Percentage of chemical stability: >150 degrees (water contact angle after soaking).

Sources:

  • Hierarchical Multilayer Edta-biobr Superamphiphobic Coatings for Enhanced Eco-friendly Photocatalytic Degradation of Nitric Oxide. Surfaces and Interfaces, 2025; 72.
  • NewsRx. Investigators at Chang'an University Report Findings in Photocatalytics (Hierarchical Multilayer Edta-biobr Superamphiphobic Coatings for Enhanced Eco-friendly Photocatalytic Degradation of Nitric Oxide). Nanotechnology Weekly. October 20, 2025; p 1316.

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