Modification of poly (ethylene glycol) with a multifunctional silane ligand, stabilization of Ag nanoparticles and its catalytic activity toward nitro-aromatics reduction

Colloidal Silver nanoparticles were prepared under mild conditions using poly(ethylene glycol) (PEG) in the presence of PVA as surfactant. Ethylene glycol was used as a reducing agent for the preparation of metal particles at room temperature. Ag+1can be smoothly reduced to silver nanoparticles at ambient condition in PEG 400. UV-visible studies demonstrated that the reducing rate of Ag+1to nano-Ag was remarkably enhanced with the increased amount of the PEG. The transmission microscope images prove that the reduced Ag nanoparticles were spherical in shape. The pathway described here was considered as a green route for preparation of silver nanoparticles.

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Application of Stabilized Silver Nanoparticles as Thin Films as Corrosion Inhibitors for Carbon Steel Alloy in 1 M Hydrochloric Acid

Journal of Nanomaterials ◽

10.1155/2013/580607 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 14

Author(s):

Ayman M. Atta ◽

Hamad A. Allohedan ◽

Gamal A. El-Mahdy ◽

Abdel-Rahman O. Ezzat

Keyword(s):

Silver Nanoparticles ◽

Carbon Steel ◽

Ethylene Glycol ◽

Ag Nanoparticles ◽

Electrochemical Impedance ◽

Vinyl Pyrrolidone ◽

Poly Ethylene Glycol ◽

Corrosive Media ◽

Self Assembled ◽

Poly Ethylene

Nanometer scaled materials have attracted tremendous interest as corrosion protective films due to their high ability to form self-assembled films on the metal surfaces. It is well known that the silver nanoparticles have higher reactivity towards aqueous acidic solution. The present work aims to prepare coated silver nanoparticles to protect carbon steel alloys from aqueous acidic corrosive media. In this respect, Ag nanoparticles colloid solutions were produced through reducing AgNO3separately with trisodium citrate in an aqueous solution or in the presence of stabilizer such as poly(ethylene glycol) thiol and poly(vinyl pyrrolidone). The morphology of the modified silver nanoparticles was investigated by TEM and DLS. UV-Vis absorption spectrum was used to study the effect of HCl on the stability of the dispersed silver nanoparticles. The corrosion inhibition efficiency of the poly (ethylene glycol)thiol, the self-assembled monolayers of Ag nanoparticles, was determined by polarization method and electrochemical impedance spectroscopy (EIS). Polarization curves indicated that the coated silver poly (ethylene glycol)thiol acted as a mixed type inhibitor. The data of inhibition efficiencies obtained measured by polarization measurements are in good agreement with those obtained with electrochemical impedance.

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Spontaneous Formation of Ag Nanoparticles in Dimethylacetamide Solution of Poly(ethylene glycol)

Journal of Colloid and Interface Science ◽

10.1006/jcis.2002.8674 ◽

2002 ◽

Vol 255 (2) ◽

pp. 299-302 ◽

Cited By ~ 57

Author(s):

Dong-Hwang Chen ◽

Yan-Wen Huang

Keyword(s):

Ethylene Glycol ◽

Ag Nanoparticles ◽

Poly Ethylene Glycol ◽

Spontaneous Formation ◽

Poly Ethylene

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Iterative Preparation of Platinum Nanoparticles in an Amphiphilic Polymer Matrix: Regulation of Catalytic Activity in Hydrogenation

Synlett ◽

10.1055/s-0037-1611813 ◽

2019 ◽

Vol 31 (02) ◽

pp. 147-152 ◽

Cited By ~ 2

Author(s):

Takao Osako ◽

Jakkrit Srisa ◽

Kaoru Torii ◽

Go Hamasaka ◽

Yasuhiro Uozumi

Keyword(s):

Catalytic Activity ◽

Ethylene Glycol ◽

Polymer Matrix ◽

Platinum Nanoparticles ◽

Aromatic Compounds ◽

Amphiphilic Polymer ◽

Poly Ethylene Glycol ◽

Fifth Generation ◽

Poly Ethylene

We demonstrate that iteration of the seeded preparation of platinum nanoparticles dispersed in an amphiphilic polystyrene–poly(ethylene glycol) resin (ARP–Pt) regulates their catalytic activity in the hydrogenation of aromatic compounds in water. The catalytic activity of the fifth generation of ARP–Pt [G5] prepared through four iterations of the seeded preparation was far superior to that of the initial ARP–Pt [G1] in the hydrogenation of aromatic compounds in water.

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