期刊
BIOMATERIALS SCIENCE
卷 11, 期 10, 页码 3589-3602出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3bm00260h
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In this study, a homo-heterostructured S-Cu-FC/CuS/GO@CMC hydrogel was constructed for the first time through an in situ ionic complexation reaction. The hydrogel exhibited enhanced photocatalytic performance under 808 nm near-infrared light irradiation. The interface between S-Cu-FC/CuS and graphene oxide (GO) facilitated the fast transfer of photogenerated charges, leading to the robust sterilization ability of the hydrogel.
Charge transfer and separation play a critical role in the photocatalytic efficiency of photoresponsive materials and their subsequent applications. Herein, for the first time, we constructed a homo-heterostructured S-Cu-FC/CuS modified carboxymethyl cellulose (CMC) hydrogel doped with graphene oxide (GO) (S-Cu-FC/CuS/GO@CMC) through an in situ ionic complexation reaction, which exhibited enhanced photocatalytic performance under 808 nm near-infrared (NIR) light irradiation. On the one hand, photo-excited charges can rapidly transfer across the homo-heterojunction interface with copper atoms in S-Cu-FC/CuS as both donors and acceptors. On the other hand, the interface between GO and S-Cu-FC/CuS also favors the fast transfer of photogenerated charges. Hence, with the assistance of a photothermal effect, the enhanced photocatalytic performance of S-Cu-FC/CuS/GO endowed the hydrogel with robust sterilization ability for killing 99.5% S. aureus and 100.0% E. coli under 10 min NIR light irradiation. An in vivo test disclosed that this hydrogel could also accelerate the healing of bacteria-infected wounds.
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