am7b18136_si_001.pdf (748.48 kB)
Silver-Incorporated Mussel-Inspired Polydopamine Coatings on Mesoporous Silica as an Efficient Nanocatalyst and Antimicrobial Agent
journal contribution
posted on 2018-01-05, 17:24 authored by Yiyan Song, Huijun Jiang, Bangbang Wang, Yan Kong, Jin ChenTo tackle severe environmental pollution,
a search for materials by economical and eco-friendly preparations
is demanding for public health. In this study, a novel in situ method
to form silver nanoparticles under mild conditions was developed using
biomimetic reducing agents of polydopamine coated on the rodlike mesoporous
silica of SBA-15. The synthesized SBA-15/polydopamine (PDA)/Ag nanocomposites
were characterized by a combination of physicochemical and electrochemical
methods. 4-Nitrophenol (4-NP) and methylene blue (MB) were used as
models for the evaluation of the prepared nanocatalysts of SBA-15/PDA/Ag
in which the composite exhibited enhanced catalytic performance toward
degrading 4-NP in solution and MB on the membrane, respectively. Additionally,
compared with that of solid core–shell SiO2/PDA/Ag,
tubular SBA-15/PDA/Ag showed the prolonged inhibitory effect on microbial
growth as typified by Escherichia coli (60 h), Staphylococcus aureus (36 h), and Aspergillus fumigatus (60 h), which demonstrated efficient control of silver nanoparticles
release from the mesopores. The constructed dual-functional SBA-15/PDA/Ag
as the long-term antimicrobial agent and the catalyst of industrial
products provides an integrated nanoplatform to deal with environmental
concerns.