Abstract
The coronavirus disease 2019(COVID-19)caused a large number of deaths and serious economic losses.Safety precautions and effective measures are urgently demanded to control the virus spread in pub-lic places.Owing to the longevity of the viruses in the aerosols and surfaces,sustained nanomaterials with efficient antiviral abilities during both daytime and night appear to be a promising way to con-trol virus spread.Here,AgCu nanocomposites,which are outstanding antibacterial and antiviral elements,including Ag2Cu2O3 and AgCuO2,have been successfully prepared via a simple co-precipitation method for inactivation of model Qbeta(Qβ)bacteriophage.Notably,Ag2Cu2O3 has uniform nanorods morphol-ogy with a width of 50-100 nm and a length of 200-500 nm,regular elemental states of Cu2+and Ag+,and good visible light response.Instead,AgCuO2 has more complex elemental states of Cu2+,Ag+,and Ag3+,including morphology with large particles of 500-1000 nm surrounded by small nanorods and nanoplates.Density functional theory(DFT)calculations showed that Ag2Cu2O3 has a lower work function than AgCuO2,indicating the charges can be better released from the surface.The accumulated surface charge can bind to the virus to inactivate it.As a result,Ag2Cu2O3 shows outstanding antiviral properties with a 6-log reduction(99.9999％)of Qβ phage after 45 min contact under dark condition,and the activity can be further promoted to 7.5-log inactivation of Qβ phage after the same time con-tact under visible light irradiation,revealing its potential to sustainably prevent viruses spread in indoor environments.
基金项目
Wisdom Accumulation and Talent Cultivation Project of the Third Xiangya Hospital of Central South University(BJ202205)
National Natural Science Foundation of China(22376222)
Central South University Research Programme of Advanced Interdisciplinary Studies(2023QYJC012)
Natural Science Foundation of Hunan Province(2021JJ30864)
NETL
NSTL
万方数据