TY - JOUR
T1 - Synthesis and direct interactions of silver colloidal nanoparticles with pollutant gases
AU - Patakfalvi, Rita
AU - Diaz, David
AU - Velasco-Arias, Donaji
AU - Rodriguez-Gattorno, Geonel
AU - Santiago-Jacinto, Patricia
N1 - Funding Information:
R.P. gives thanks to DGAPA UNAM for the post-doc fellowship. We also thank L. Rendon for HRTEM observation assistance. The authors are also thankful to the Central Microscopy facilities of the Institute of Physics, UNAM. D.D. wants to thank CONACyT E43662 and DGAPA UNAM IN110405 for financial support. Finally, the authors want to thank Dr. M. Iglesias-Arteaga for providing us cholic acid.
PY - 2008/1
Y1 - 2008/1
N2 - Silver nanoparticles (NPs) were synthesized in organic solvents. Spontaneous reduction of silver salts takes place in N, N′-dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) at room temperature. The formed colloids are not stable without a stabilizing agent, hence rarely used, and inexpensive organic molecules (β-cyclodextrin and cholic acid) were used as surface modifiers in DMF. The stabilization was successful; the Ag NPs remained stable for more than 3 months. Additionally, Ag NPs were prepared using Ag-2-ethylhexanoate and Na-citrate as capping agent in DMSO. The resulting NPs are stable, of 4.4 nm average size, and at the same time reactive for catalytic purposes. The interaction of Ag NPs with pollutant atmospheric gases (NO and SO2) was studied. UV-visible spectra show the oxidation of silver and the very efficient reduction of NO at room temperature. SO2 molecules are adsorbed on the NPs surface, causing their aggregation and precipitation.
AB - Silver nanoparticles (NPs) were synthesized in organic solvents. Spontaneous reduction of silver salts takes place in N, N′-dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) at room temperature. The formed colloids are not stable without a stabilizing agent, hence rarely used, and inexpensive organic molecules (β-cyclodextrin and cholic acid) were used as surface modifiers in DMF. The stabilization was successful; the Ag NPs remained stable for more than 3 months. Additionally, Ag NPs were prepared using Ag-2-ethylhexanoate and Na-citrate as capping agent in DMSO. The resulting NPs are stable, of 4.4 nm average size, and at the same time reactive for catalytic purposes. The interaction of Ag NPs with pollutant atmospheric gases (NO and SO2) was studied. UV-visible spectra show the oxidation of silver and the very efficient reduction of NO at room temperature. SO2 molecules are adsorbed on the NPs surface, causing their aggregation and precipitation.
KW - Ag nanoparticles
KW - Application
KW - NO
KW - SO
KW - UV-visabsorbance spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=38049046099&partnerID=8YFLogxK
U2 - 10.1007/s00396-007-1702-0
DO - 10.1007/s00396-007-1702-0
M3 - Artículo
SN - 0303-402X
VL - 286
SP - 67
EP - 77
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 1
ER -