原位电化学辅助还原制备石墨烯/银纳米粒子@多金属氧簇复合薄膜及其抗菌性能

Assembly of rGO/POM/silver Nanoparticles Films by In-Situ Electrochemical-assisted Reduction:Enhanced Antibacterial Effect

结合层层自组装法和电化学辅助还原法,原位制备了一种还原态氧化石墨烯(rGO)/银纳米粒子(Ag Nps)@多金属氧簇(P_(2)W_(18))复合薄膜{(PEI/rGO)n-Ag@P_(2)W_(18)},并根据Kirby-Bauer法测试了该复合薄膜对枯草芽孢杆菌和金黄色葡萄球菌的抗菌性能。通过与层层自组装法制备的{PEI/Ag@P_(2)W_(18)}n和{PEI/(rGO-Ag@P_(2)W_(18))}n薄膜比较发现,仅负载单层抗菌组分Ag@P_(2)W_(18)的{(PEI/rGO)3-Ag@P_(2)W_(18)}复合薄膜(对枯草芽孢杆菌抑菌环为17.2 mm)抗菌性能高于负载三层Ag@P_(2)W_(18)的{PEI/Ag@P_(2)W_(18)}3(对枯草芽孢杆菌抑菌环为14.8 mm),与负载三层Ag@P_(2)W_(18)的{PEI/(rGO-Ag@P_(2)W_(18))}3薄膜(对枯草芽孢杆菌抑菌环为17.4 mm)抗菌性能相当,说明电化学辅助还原法可以有效提升复合薄膜的抗菌性能。

A reduced graphene oxide(rGO)/polyoxometalate(POM)/silver nanoparticles(Ag NPs)composite film{(PEI/rGO)n-Ag@P_(2)W_(18)}fabricated by combining layer self-assembly and in-situ electrochemical-assisted reduction method.The antibacterial effects of{(PEI/rGO)n-Ag@P_(2)W_(18)}composite film for Bacillus subtilis and Glucococcus aureus were investigated by Kirby-Bauer method.Compared with{PEI/Ag@P_(2)W_(18)}n and{PEI/(rGO-Ag@P_(2)W_(18))}n films prepared by Layer by layer method,the antibacterial activity of{(PEI/rGO)3-Ag@P_(2)W_(18)}composite film(17.2 mm for bacteriostatic annulus of Bacillus subtilis)loading monolayer of Ag@P_(2)W_(18) were higher than the{PEI/Ag@P_(2)W_(18)}3 film(14.8 mm for bacteriostatic annulus of Bacillus subtilis),comparable to the{(PEI/rGO)3-Ag@P_(2)W_(18)}film(17.4 mm for bacteriostatic annulus of Bacillus subtilis)with three layers of Ag@P_(2)W_(18).The results demonstrated that the antibacterial activity of composite film fabricated by in-situ electrochemical-assisted reduction has been greatly enhanced.