Abstract
We reported the fabrication of an in situ surface-enhanced Raman scattering (SERS) monitoring platform, comprised of a porous eggshell membrane (ESM) bioscaffold loaded with Ag nanoprism via an electrostatic self-assembly approach. The localized surface plasmon resonance (LSPR) property of silver nanoprism leads to the blue color of the treated ESMs. UV-vis diffuse reflectance spectroscopy, scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements were employed to observe the microstructure and surface property of Ag nanoprisms on the ESMs. The silver nanoprism-loaded eggshell membrane (AgNP@ESM) exhibited strong catalytic activity for the reduction of 4-nitrophenol by sodium borohydride (NaBH4) and it can be easily recovered and reused for more than six cycles. Significantly, the composites also display excellent SERS efficiency, allowing the in situ SERS monitoring of molecular transformation in heterogeneous catalysis. The results indicate that the AgNP@ESM biocomposite can achieve both SERS and catalytic functionalities simultaneously in a single entity with high performance, which promotes the potential applications of ESM modified with functional materials.
Highlights
Noble metal nanoparticles, including gold and silver nanoparticles, are currently of great interest for their distinctive plasmonic properties and extensive research attention in near-field related applications, such as surface-enhanced spectroscopy [1,2], biomedicine [3,4], photonics [5,6], and biosensing [7,8]
Three extinction bands centered at 330, 504 and 700 nm were seen in the extinction spectrum
AgNP@eggshell membrane (ESM) still exhibit good catalytic activity even after sixactivity cycles. These results demonstrate that biocomposites possess strong catalytic cycles. These results demonstrate that the AgNP@ESM biocomposites possess strong catalytic activity and good durability
Summary
Yaling Li 1 , Yong Ye 1 , Yunde Fan 1 , Ji Zhou 1, *, Li Jia 1 , Bin Tang 2,3, * and Xungai Wang 2,3. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education & College of Chemistry. Received: 27 December 2016; Accepted: 3 February 2017; Published: 18 February 2017
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