As a semiconductor material with a 2D-laminate structure,g-C3N4(bandwidth 2.7 eV)has a similar struc-ture and excellent performance to graphene.However,high surface energy and photogenerated e-h re-combination 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 chem-ical 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.Be-sides,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 pho-togenerated 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 photo-catalytic antifouling mechanisms of NR ZnO-CNNs were proposed,thus it provided a broader platform for the design of versatile marine protection materials.

Yiqian Lv;Yueqing Zheng;Honglin Zhu;Yinghao Wu

Chemistry Institute for Synthesis and Green Application,College of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,PR China;Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Science,Ningbo 315201,PR China

材料科学技术（英文版）

[1]Yiqian Lv;Yueqing Zheng;Honglin Zhu;Yinghao Wu-.Designing a dual-functional material with barrier anti-corrosion and photocatalytic antifouling properties using g-C3N4 nanosheet with ZnO nanoring)[J].材料科学技术（英文版）,2022(11):56-69

nanoring,togenerated,Antialgae

Designing,dual,functional,barrier,photocatalytic,antifouling,properties,using,C3N4,ZnO,semiconductor,2D,laminate,structure,bandwidth,eV,has,similar,excellent,performance,graphene,However,surface,energy,photogenerated,combination,seriously,hinder,its,application,field,marine,anticorrosion,To,solve,these,problems,synthesized,nanosheets,decorated,via,etching,technology,Whether,NR,CNNs,have,protection,among,pure,EP,metal,substrate,were,investigated,hybrid,also,estimated,through,resistance,tests,Combined,electrochemical,results,was,found,that,impedance,modulus,within,days,showed,two,orders,magnitude,higher,than,wt,NaCl,solution,Be,sides,Local,spectroscopy,LEIS,further,explored,behavior,coating,which,indicated,scratch,maintained,between,Under,visible,light,conditions,lifetime,prolonged,due,formation,heterojunction,observed,antibacterial,against,Bacillus,subtilis,reached,performed,chlorella,seawater,could,make,sharply,reduce,Simultaneously,mechanisms,proposed,thus,provided,broader,platform,design,versatile,materials

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