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Atomically precise silver clusters for efficient chlorocarbon degradation
- Source :
- J. Mater. Chem. A. 1:611-620
- Publication Year :
- 2013
- Publisher :
- Royal Society of Chemistry (RSC), 2013.
-
Abstract
- We describe the degradation of chlorocarbons (CCl4, C 6H5CH2Cl and CHCl3) in solution at room temperature (27 � 4 �C) by the monolayer-protected silver quantum cluster, Ag9MSA7 (MSA: mercaptosuccinic acid) in the presence of isopropyl alcohol (IPA). The main degradation products were silver chloride and amorphous carbon. Benzyl chloride was less reactive towards clusters than CCl4 and CHCl3. Materials used in the reactions and the reaction products were characterized using several spectroscopic and microscopic tools such as ultraviolet-visible (UV/Vis) absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), photoluminescence spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), energy dispersive analysis of X-rays (EDAX) and scanning electron microscopy (SEM). We have shown that clusters are more efficient for the degradation of halocarbons than the corresponding monolayer-protected nanoparticles (Ag@MSA, particle diameter 15 � 5 nm) at a given time and temperature. The higher reactivity of clusters is attributed to their small size and large surface area. Clusters and nanoparticles were used for reactions in supported (on neutral alumina) and unsupported forms. A possible mechanism for the reaction has been postulated on the basis of experimental results. � 2013 The Royal Society of Chemistry.
- Subjects :
- Halocarbons
Silver
Absorption spectroscopy
X ray diffraction
X ray photoelectron spectroscopy
Energy dispersive analysis of X-rays
Alumina
Analytical chemistry
Degradation
chemistry.chemical_compound
symbols.namesake
Silver chloride
X-ray photoelectron spectroscopy
General Materials Science
Fourier transform infrared spectroscopy
Spectroscopy
Monolayers
Photoluminescence spectroscopy
Renewable Energy, Sustainability and the Environment
Chemistry
Microscopic tools
Amorphous carbon
General Chemistry
Silver halides
Isopropyl alcohols
Chlorine compounds
Benzyl chloride
Particle diameters
Possible mechanisms
Raman spectroscopy
Mercaptosuccinic acids
symbols
Nanoparticles
Large surface area
Scanning electron microscopy
Degradation products
Photoelectrons
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 1
- Database :
- OpenAIRE
- Journal :
- J. Mater. Chem. A
- Accession number :
- edsair.doi.dedup.....7077dacd20541525390298f40b42df3d