Perylenediimide/silver nanohybrids with visible-light photocatalysis enhanced antibacterial effect

• Published in: Dyes and pigments Vol. 195; p. 109698
• Main Authors: Cai, Yang, Cheng, Wenyu, Ji, Chendong, Su, Zhiqiang, Yin, Meizhen
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2021
• Subjects: Antibacterial; Assembly-templated nanohybrids; Perylenediimide; Silver nanoparticles; Visible-light photocatalysis; Perylenediimide; Assembly-templated nanohybrids; Antibacterial; Visible-light photocatalysis; Silver nanoparticles
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/j.dyepig.2021.109698

Bacterial infections cause severe threats to human health. Silver nanoparticles (AgNPs) are promising antibacterial materials, but still confront poor colloidal stability and uncontrollable silver ion (Ag+) release. Here, a dye template strategy based on tunable perylenediimide (PDI) self-assembly is presented for constructing novel silver nanohybrids with visible-light photocatalysis enhanced antibacterial effect. Ultrasmall AgNPs are grown on diversiform topological PDI self-assembly-templates via in situ reduction to yield silver nanohybrids, achieving stable AgNPs dispersion. The developed fiber-like nanohybrids (BF@AgNPs) are endowed with photocatalytic ability by PDI nanofiber templates. Upon visible-light irradiation, BF@AgNPs generate reactive oxygen species via photocatalytic reaction, facilitating the AgNPs degradation to release Ag+ and concurrently exerting photocatalytic damage to bacteria. Consequently, the visible-light photocatalysis enhanced antibacterial effect of BF@AgNPs against Staphylococcus aureus and Escherichia coli is achieved via synergetic Ag+ release and photocatalytic performance. This work not only provides a versatile molecular assembly strategy for developing new powerful antibacterial materials, but also opens up a new way for dye functionalization. [Display omitted] •Tunable perylenediimide self-assemblies are used as templates to construct silver nanohybrids in situ.•BF@AgNPs can generate ROS via photocatalysis, facilitating Ag+ release upon visible-light irradiation.•BF@AgNPs exhibit enhanced antibacterial effect via synergetic Ag+ release and photocatalysis upon visible-light irradiation.