GO-CeO_(2)防污剂的制备及性能研究

Study of Preparation and Performance of GO-CeO_(2) Antifouling Agent

为了满足海洋装备绿色抗菌防污需求,具有卤代过氧化物类酶活性的氧化铈(CeO_(2))纳米颗粒可作为绿色高效的新型防污剂,利用氧化石墨烯(GO)的负载以提高CeO_(2)卤代过氧化物类酶活性。采用水热法,将GO作为CeO_(2)晶核生长的负载层,成功制备了GO质量分数分别为1%、2%、4%的3种GO-CeO_(2)复合材料。从形貌、成分、卤代过氧化物类酶活性、抗菌性能等方面探讨了不同GO含量的GO-CeO_(2)基于卤代过氧化物类酶活性的抗菌性能。结果表明:GO质量分数为2%的GO-CeO_(2)复合材料中短棒型CeO_(2)均匀致密地分布在GO负载层,具有最高的Ce^(3+)和氧空位浓度,能带间隙为2.76 eV,卤代过氧化物类酶活性能力最强,抑菌率达到98.47%,达到新型防污剂的预期要求。与商品化的CeO_(2)相比,GO-CeO_(2)复合材料具有更强的卤代过氧化物类酶活性,可为CeO_(2)绿色高效新型防污剂的应用提供新参考。

In order to meet the green antibacterial and antifouling requirements of marine equipment, cerium oxide(CeO_(2)) nanoparticles with haloperoxidase activity could be used as a new green and efficient antifouling agent, and graphene oxide(GO) loading was used to enhance the activity of CeO_(2) haloperoxidases mimicry. Herein, three kinds of GO-CeO_(2) composite materials with GO mass fractions of 1%, 2% and 4% were successfully prepared by using GO as the supporting layer for the growth of CeO_(2) crystal nuclei by hydrothermal method. The antibacterial properties of GO-CeO_(2) with different GO contents based on the activity of haloperoxidase mimicry were discussed from the aspects of morphology, composition, activity and antibacterial properties of haloperoxidase mimicry. Results showed that in the GO-CeO_(2) composite with 2%(mass fraction) GO, the short-rod CeO_(2) was uniformly and densely distributed in the GO loading layer, which possessed the highest concentration of Ce^(3+) and oxygen vacancies, and the energy band gap was 2.76 eV. Additionally, the activity of haloperoxidase mimicry was the strongest, and the antibacterial rate reached 98.47%, which met the expected requirements of the new antifouling agent. Compared with commercial CeO_(2), GO-CeO_(2) composites had the stronger activity of haloperoxidase mimicry, providing a new reference for the application of CeO_(2) green and efficient new antifouling agents.