期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 101, 期 -, 页码 138-147出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2019.03.096
关键词
Nanocomposites; Ag; gamma-Fe2O3; Amorphous carbon nitride; Heat treatment
资金
- Science and Technology Planning Project of Guangdong Province [2013B050800023, 2013B090600148]
- National Natural Science Foundation of China [21607031]
Nanocomposites composed of Ag and gamma-Fe2O3 nanoparticles within poly-gamma-glutamic acid (gamma-PGA) derived amorphous carbon nitride (a-CN) films (Ag + gamma-Fe2O3@a-CN) were synthesized by a one-step facile pyrolysis strategy. Transmission electron microscopy analysis shows that Ag and gamma-Fe2O3 nanoparticles were obtained in situ and homogeneously dispersed on the a-CN matrix. The average size of nanoparticles was 8.1 nm. The presence of gamma-Fe2O3, Ag, and a-CN in the nanocomposite was confirmed by X-ray diffraction analysis, UV-visible absorption spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Ag + gamma-Fe2O3@a-CN catalyzed the degradation of methyl orange. This catalyst was also recycled ten times by magnetic separation without any loss in efficiency. Ag + gamma-Fe2O3 @a-CN exhibited strong antibacterial activity against E. coli and S. aureus. It also exhibited excellent antibacterial activity even after 20 times magnetic recycling. This indicates that this is a promising recyclable antibacterial and catalyst for environmental applications.
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