期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 17, 页码 15122-15131出版社
AMER CHEMICAL SOC
DOI: 10.1021/am5032727
关键词
photocatalyst; heterostructure; visible light; photoinactivation; recyclability
资金
- National Natural Science Foundation of China [21322504, 21275026, 11174046]
- Fundamental Research Funds for the Central Universities [N120505002, N120505006, N110805001]
- Program for Liaoning Excellent Talents in University [LJQ2013028]
Silver orthophosphate (Ag3PO4) is a low-band-gap photocatalyst that has received considerable research interest in recent years. In this work, the magnetic Ag3PO4/TiO2/Fe3O4 heterostructured nanocomposite was synthesized. The nanocomposite was found to exhibit markedly enhanced photocatalytic activity, cycling stability, and long-term durability in the photodegradation of acid orange 7 (AO7) under visible light. Moreover, the antibacterial film prepared from Ag3PO4/TiO2/Fe3O4 nanocomposite presented excellent bactericidal activity and recyclability toward Escherichia coli (E. coli) cells under visible-light irradiation. In addition to the intrinsic cytotoxicity of silver ions, the elevated bactericidal efficiency of Ag3PO4/TiO2/Fe3O4 can be largely attributed to its highly enhanced photocatalytic activity. The photogenerated hydroxyl radicals and superoxide ions on the formed Ag/Ag3PO4/TiO2 interfaces cause considerable morphological changes in the microorganism's cells and lead to the death of the bacteria.
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