As a semiconductor material with a 2D-laminate structure, g-C₃N₄ (bandwidth 2.7 eV) has a similar structure and excellent performance to graphene. However, high surface energy and photogenerated e–h recombination of g-C₃N₄ seriously hinder its application in the field of marine anticorrosion and antifouling. To solve these problems, we synthesized the g-C₃N₄ nanosheets decorated with ZnO nanoring via chemical etching technology. Whether the NR ZnO-CNNs have surface protection performance among the pure EP on the corrosion protection for metal substrate were investigated. The antifouling properties NR ZnO-CNNs hybrid were also estimated through photocatalytic bacterial and algae resistance tests. Combined with the electrochemical results, it was found that the impedance modulus of NR ZnO-CNNs/EP within 45 days showed two orders of magnitude higher than that of pure EP in the 3.5 wt% NaCl solution. Besides, Local electrochemical impedance spectroscopy (LEIS) further explored the anticorrosion behavior of NR ZnO-CNNs/EP coating, which indicated that the NR ZnO-CNNs/EP coating with a scratch maintained an excellent corrosion resistance between 0–24 h. Under the visible light conditions, the lifetime of photogenerated e–h was prolonged due to the formation of NR ZnO-CNNs heterojunction structure, it was observed that the antibacterial rate against Bacillus subtilis reached 100% within 8 h. An Antialgae test was performed on chlorella seawater solution, which indicated that 5 mg/mL of NR ZnO-CNNs hybrid could make chlorella sharply reduce within 4 days. Simultaneously, the corrosion protection and photocatalytic antifouling mechanisms of NR ZnO-CNNs were proposed, thus it provided a broader platform for the design of versatile marine protection materials.

gC ₃ N ₄ (带宽2.7 eV)作为一种二维叠层结构的半导体材料，具有与石墨烯相似的结构和优异的性能。然而，gC ₃ N _{4 的}高表面能和光生e-h复合严重阻碍了其在海洋防腐和防污领域的应用。为了解决这些问题，我们合成了 gC ₃ N ₄通过化学蚀刻技术装饰有 ZnO 纳米环的纳米片。研究了NR ZnO-CNNs对金属基材的腐蚀保护在纯EP中是否具有表面保护性能。还通过光催化细菌和藻类抗性测试评估了 NR ZnO-CNNs 混合物的防污性能。结合电化学结果发现，在 3.5 wt% NaCl 溶液中，NR ZnO-CNNs/EP 在 45 天内的阻抗模量比纯 EP 的阻抗模量高两个数量级。此外，局部电化学阻抗谱（LEIS）进一步探索了 NR ZnO-CNNs/EP 涂层的防腐行为，这表明带有划痕的 NR ZnO-CNNs/EP 涂层在 0-24 小时之间保持了优异的耐腐蚀性。在可见光条件下，由于NR ZnO-CNNs异质结结构的形成，光生e-h的寿命延长，观察到对枯草芽孢杆菌的抗菌率在8小时内达到100%。对小球藻海水溶液进行了抗藻试验，结果表明 5 mg/mL 的 NR ZnO-CNNs 混合物可以使小球藻在 4 天内急剧减少。同时提出了NR ZnO-CNNs的腐蚀保护和光催化防污机理，为多功能海洋防护材料的设计提供了更广阔的平台。这表明 5 mg/mL 的 NR ZnO-CNNs 混合物可以使小球藻在 4 天内急剧减少。同时提出了NR ZnO-CNNs的腐蚀保护和光催化防污机理，为多功能海洋防护材料的设计提供了更广阔的平台。这表明 5 mg/mL 的 NR ZnO-CNNs 混合物可以使小球藻在 4 天内急剧减少。同时提出了NR ZnO-CNNs的腐蚀保护和光催化防污机理，为多功能海洋防护材料的设计提供了更广阔的平台。