1 research outputs found
Highly Reproducible Ag NPs/CNT-Intercalated GO Membranes for Enrichment and SERS Detection of Antibiotics
The increasing pollution of aquatic
environments by antibiotics makes it necessary to develop efficient
enrichment and sensitive detection methods for environmental antibiotics
monitoring. In this work, silver nanoparticles and carbon nanotube-intercalated
graphene oxide laminar membranes (Ag NPs/CNT-GO membranes) were successfully
prepared for enrichment and surface-enhanced Raman scattering (SERS)
detection of antibiotics. The prepared Ag NPs/CNT-GO membranes exhibited
a high enrichment ability because of the π–π stacking
and electrostatic interactions of GO toward antibiotic molecules,
which enhanced the sensitivity of SERS measurements and enabled the
antibiotics to be determined at sub-nM concentrations. In addition,
the nanochannels created by the intercalation of CNTs into GO layers
resulted in an 8-fold enhancement in the water permeance of Ag NPs/CNT-GO
membranes compared to that of pure GO membranes. More importantly,
the Ag NPs/CNT-GO membranes exhibited high reproducibility and long-term
stability. The spot-to-spot variation in SERS intensity was less than
15%, and the SERS performance was maintained for at least 70 days.
The Ag NPs/CNT-GO membranes were also used for SERS detection of antibiotics
in real samples; the results showed that the characteristic peaks
of antibiotics were obviously recognizable. Thus, the sensitive SERS
detection of antibiotics based on Ag NPs/CNT-GO offers great potential
for practical applications in environmental analysis