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Designing a dual-functional material with barrier anti-corrosion and photocatalytic antifouling properties using g-C_(3)N_(4) nanosheet with zno nanoring

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Journal of Materials Science & Technology 2022年第11期106卷 56-69页

作者： Yiqian Lv Yueqing Zheng Honglin Zhu Yinghao Wu Chemistry Institute for Synthesis and Green Application College of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211PR China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo 315201PR China

As a semiconductor material with a 2 D-laminate structure, g-C_(3)N_(4)(bandwidth 2.7 e V) has a similar structure and excellent performance to graphene. However, high surface energy and photogenerated e–h recombination of g-C_(3)N_(4)seriously hinder its application in the field of marine anticorrosion and antifouling.To solve these problems, we synthesized the g-C_(3)N_(4)nanosheets decorated with Zn O nanoring via chemical etching technology. Whether the NR Zn O-CNNs have surface protection performance among the pure EP on the corrosion protection for metal substrate were investigated. The antifouling properties NR Zn OCNNs 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 Zn O-CNNs/EP within 45 days showed two orders of magnitude higher than that of pure EP in the 3.5 wt% Na Cl solution. Besides, Local electrochemical impedance spectroscopy(LEIS) further explored the anticorrosion behavior of NR Zn O-CNNs/EP coating, which indicated that the NR Zn O-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 Zn O-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/m L of NR Zn O-CNNs hybrid could make chlorella sharply reduce within 4 days. Simultaneously, the corrosion protection and photocatalytic antifouling mechanisms of NR Zn O-CNNs were proposed, thus it provided a broader platform for the design of versatile marine protection materials.

关键词： g-C_(3)N_(4) zno nanoring Epoxy coating Anticorrosion Antifouling

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