Oxygen Vacancy‐Engineered High‐Entropy Oxide Nanozymes for Spatiotemporal Cascading Antifouling in Marine Environments

Why It Matters

The technology provides a non‑toxic, long‑lasting defense against marine biofouling, addressing a major cost and environmental challenge for shipping and offshore infrastructure. Its ability to simultaneously attack microbes and inhibit communication could set a new standard for smart surface coatings.

Key Takeaways

• Vo-HEO nanozymes generate hydroxyl radicals and HOBr simultaneously
• HOBr half-life exceeds 36 days, providing long-term biocidal action
• Combined oxidative attack reduces bacterial adhesion by 90%
• Disrupts quorum sensing and reprograms microbial metabolism
• High-entropy oxide lattice enhances active-site accessibility and stability

Pulse Analysis

Marine biofouling remains a costly and environmentally taxing problem, prompting a shift toward surface treatments that avoid traditional biocides. Conventional coatings often suffer from limited durability, rapid leaching, and ecological concerns, creating a market demand for smart, catalytic solutions. Nanozyme technology—engineered nanomaterials that replicate enzyme functions—has emerged as a promising avenue, offering tunable reactivity and resistance to degradation in harsh seawater conditions.

The breakthrough lies in oxygen‑vacancy‑engineered high‑entropy oxides (Vo‑HEO), where a multicomponent lattice introduces abundant defect sites that reshape electronic structures. These vacancies act as catalytic hot spots, enabling simultaneous generation of highly reactive hydroxyl radicals (·OH) and hypobromous acid (HOBr), a selective biocide with a half‑life exceeding 36 days. The synergy between rapid oxidative attack at the material interface and the long‑range diffusion of HOBr creates a spatiotemporal cascade: surface microbes are instantly destroyed while bulk‑phase quorum‑sensing pathways are silenced, dismantling biofilm formation at its communication core.

For the maritime industry, Vo‑HEO nanozyme coatings could translate into lower maintenance cycles, reduced fuel consumption, and compliance with tightening environmental regulations. Their defect‑driven stability promises longevity without the need for frequent re‑application, and the absence of heavy metals mitigates ecological impact. As scaling methods mature, integrating these nanozymes into hull paints, offshore platform surfaces, and aquaculture nets may redefine antifouling standards, fostering a new generation of adaptive, eco‑friendly marine technologies.