Facile synthesis of silver submicrospheres and their applications

Tang, Bin; Li, Jingliang; Fan, Li; Wang, Xungai

doi:10.1039/c5ra18513k

Cited by 9 publications

(7 citation statements)

References 47 publications

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“…Figure 5C displays the plot of the absorption intensity at 400 nm as a function of time corresponding to the treated ESMs. However, the absorption intensity corresponding to AgNP@ESM remained constant for a certain time and then decreased dramatically, implying that the AgNP@ESM exhibited remarkable catalytic activity for the reduction of 4-nitrophenol after an induction time [41]. In the presence of excess NaBH 4 , the reduction of 4-NP is generally treated as a pseudo-first-order kinetic reaction [41,42].…”

Section: Monitoring Of the Catalytic Reaction With Uv-vismentioning

confidence: 99%

Silver Nanoprism-Loaded Eggshell Membrane: A Facile Platform for In Situ SERS Monitoring of Catalytic Reactions

Fan

et al. 2017

Crystals

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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 (NaBH 4 ) 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.

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Section: Monitoring Of the Catalytic Reaction With Uv-vismentioning

confidence: 99%

Silver Nanoprism-Loaded Eggshell Membrane: A Facile Platform for In Situ SERS Monitoring of Catalytic Reactions

Fan

et al. 2017

Crystals

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“…The intensity of absorption band at 400 nm dropped remarkably for all the PtNP treated silk fabrics. Meanwhile, a new absorption peak at 300 nm appeared during the reduction process of 4-NP, which is attributed to the generation of 4-AP [ 33 , 34 ]. The reduction rate of 4-NP can be indicated by the plots of the intensity of the 400 nm band versus time ( Figure 8 f).…”

Section: Resultsmentioning

confidence: 99%

Functionalization of Silk with In-Situ Synthesized Platinum Nanoparticles

et al. 2018

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After platinum nanoparticles (PtNPs) were in-situ synthesized on silk fabrics through heat treatment, it was determined that the treatment of the silk fabrics with PtNPs imparted multiple functions, including coloring, catalysis, and antibacterial activity. The formation of PtNPs on fabrics was affected by the Pt ion concentration, pH value of solution, and reaction temperature. Acidic condition and high temperature were found to facilitate the formation of PtNPs on silk. The color strength of silk fabrics increased with the concentration of Pt ions. The PtNP treated silk fabrics exhibited reasonably good washing color fastness and excellent rubbing color fastness. The morphologies and chemical components of the treated silk fabrics were analyzed using scanning electron microscopy and X-ray photoelectron spectroscopy. The PtNP treated silk fabric exhibited significant catalytic function and a notable antibacterial effect against Escherichia coli (E. coli).

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“…However, the UV-VIS absorption intensity corresponding to AuNP-WP decreased dramatically, implying that the AuNP treated WP exhibited remarkable catalytic activity for reduction of 4-NP. Generally, the reduction of 4-NP is considered as pseudo-first-order kinetic reaction in the presence of excess NaBH 4 [ 23 , 24 ]. Figure 10 d shows a plot of ln (A t /A 0 ) versus time for the catalytic reaction with AuNP-WP.…”

Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Gold Nanoparticles on Wool Powder and Their Catalytic Application

Tang

Zhang

et al. 2017

Materials

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Gold nanoparticles (AuNPs) were synthesized in situ on wool powder (WP) under heating conditions. Wool powder not only reduced Au ions to AuNPs, but also provided a support for as-synthesized AuNPs. WPs were treated under different concentrations of Au ions, and corresponding optical features and morphologies of the treated WPs were investigated by UV-VIS diffuse reflectance absorption spectroscopy and scanning electron microscopy (SEM). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscope (TEM) were also employed to characterize the WP treated with AuNPs. The results demonstrate that AuNPs were produced in the presence of WP and distributed over the wool particles. The porous structure led to the synthesis of AuNPs in the internal parts of WP. Acid conditions and high temperature facilitated the synthesis of AuNPs by WP in aqueous solution. The reducibility of wool was improved after being converted to powder from fibers, due to exposure of more active groups. Moreover, the obtained AuNP-WP complexes showed significant catalytic activity to accelerate the reduction reaction of 4-nitrophenol (4-NP) by sodium borohydride (NaBH4).

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Facile synthesis of silver submicrospheres and their applications

Abstract: Silver submicrospheres fabricated under an ambient condition can catalyze the reduction of 4-nitrophenol and improve significantly the Raman signal of crystal violet as surface-enhanced Raman scattering (SERS) substrate.

Cited by 9 publications

References 47 publications

Silver Nanoprism-Loaded Eggshell Membrane: A Facile Platform for In Situ SERS Monitoring of Catalytic Reactions

Silver Nanoprism-Loaded Eggshell Membrane: A Facile Platform for In Situ SERS Monitoring of Catalytic Reactions

Functionalization of Silk with In-Situ Synthesized Platinum Nanoparticles

In Situ Synthesis of Gold Nanoparticles on Wool Powder and Their Catalytic Application

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