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Preparation and application of (Cu2O?Ag)@TA composite nanomaterials with enhanced stability and photocatalytic antibacterial activity

We synthesized (Cu2O?Ag)@TA heterojunction composite antibacterial material with core?shell structure, (Cu2O?Ag)@TA has excellent dispersibility and stability, enhanced photocatalytic antibacterial ability and long?lasting ion release, Thereby, achieving excellent antibacterial properties. And it was incorporated into the LbL?PVA/CS/FA composite film.Food spoilage caused by bacterial growth is a serious threat to human health, so food preservation technology with long?acting antibacterial effect has been widely studied. In this work, (Cu2O?Ag)@TA heterojunction composite antibacterial material with a core?shell structure was synthesized to improve the stability of Cu2O. Morphological characterization shows that silver nanoparticles are uniformly distributed on the surface of Cu2O microspheres, (Cu2O?Ag)@TA has a core?shell structure, the particle size is about 300?nm, and the thickness of the tannic acid shell is about 6 nm. In addition, (Cu2O?Ag)@TA exhibits excellent dispersibility and stability, it can stably release Cu2+ within 14?days and has enhanced reactive oxygen species release performance, thus achieving excellent antibacterial properties, with a minimum inhibitory concentrations of 96??g?ml?1 against Escherichia coli and Staphylococcus aureus. In addition, adding (Cu2O?Ag)@TA into the LbL?PVA/CS/FA composite film can improve the mechanical properties and antibacterial ability of the composite film, providing a feasible solution for new biodegradable antibacterial packaging materials.

Publication date: 04/08/2022

Journal of Vinyl and Additive Technology


This project has received funding from the Bio Based Industries Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 837761.