scholarly journals Facile Synthesis of Silver Nanoparticles Stabilized by Cationic Polynorbornenes and Their Catalytic Activity in 4-Nitrophenol Reduction

Langmuir ◽  
2013 ◽  
Vol 29 (13) ◽  
pp. 4225-4234 ◽  
Author(s):  
Bharat Baruah ◽  
Gregory J. Gabriel ◽  
Michelle J. Akbashev ◽  
Matthew E. Booher
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Facile Synthesis ◽  
Nitrophenol Reduction

scholarly journals Room-Temperature Polyol Synthesis of Ag/SiO2 Nanocomposite as a Catalyst for 4-Nitrophenol Reduction

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Canh Minh Thang Nguyen ◽  
Vinh Tien Nguyen
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Apparent Rate Constant ◽  
Polyol Synthesis ◽  
Ultrasonic Probe ◽  
Nitrophenol Reduction ◽  
The Stability ◽  
Xrd Patterns

We prepared silver nanoparticles (AgNP) embedded in SiO2 using a green polyol approach by conducting the synthesis at ambient temperature and pH. Glycerol solutions of SiO2 and silver nitrate were stirred overnight at room temperature. UV-vis spectra and TEM images of the reaction dispersion and XRD patterns of the centrifuged solid confirmed formation of AgNP (6 ± 2 nm) were embedded in SiO2. AAS showed that, about 50% of initial silver was deposited on SiO2. The presence of SiO2 enhanced the formation of AgNP and the stability of Ag/SiO2 in glycerol. The reason for these findings was probably the ultrasonic-probe dispersion of SiO2 in glycerol, which caused chemical interactions between glycerol and SiO2. Compared to bare AgNP, the AgNP/SiO2 demonstrated higher catalytic activity toward 4-nitrophenol reduction by NaBH4. The highest apparent rate constant was approximately 1.1 ∗ 10−4 s−1, comparable with Ag/SiO2 catalysts prepared using other methods. This study proposes a greener polyol method to synthesize SiO2-supported AgNP catalyst that does not require heating or regulating pH of the reaction mixture. This nanocomposite can be used in catalytic, antimicrobial, sensing, and other applications that are using AgNP/SiO2 synthesized by conventional methods.

Silver nanoparticles on carboxyl-functionalized Fe3O4 with high catalytic activity for 4-nitrophenol reduction

RSC Advances ◽  
2015 ◽  
Vol 5 (62) ◽  
pp. 50505-50511 ◽  
Author(s):  
Wei Zhou ◽  
Yi Zhou ◽  
Yu Liang ◽  
Xiaohui Feng ◽  
Hong Zhou
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Nitrophenol Reduction

Silver nanoparticles on carboxyl-functionalized Fe3O4 show a high catalytic activity toward 4-nitrophenol reduction.

Green Synthesis of Silver Nanoparticles with Exceptional Colloidal Stability and its Catalytic Activity Toward Nitrophenol Reduction

NANO ◽  
2016 ◽  
Vol 11 (04) ◽  
pp. 1650046 ◽  
Author(s):  
Manisha Sharma ◽  
Amit Mishra ◽  
Vinod Kumar ◽  
Soumen Basu
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Colloidal Stability ◽  
Ag Nps ◽  
Step Process ◽  
Synthesis Parameters ◽  
Salt Addition ◽  
Nitrophenol Reduction ◽  
Vis Spectroscopy ◽  
One Step

Silver nanoparticles (Ag NPs) were synthesized by one-step process in the presence of kollicoat as capping, reducing and stabilizing mediator. The synthesized NPs were characterized by using FTIR, TEM, DLS, XRD, EDS and UV-Vis spectroscopy. The resulting Ag NPs had an incomparable colloidal stability against the salt addition and change of pH. The effect of different synthesis parameters and the catalytic property of the NPs were examined.

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