PMID- 23425792
OWN - NLM
STAT- MEDLINE
DCOM- 20130830
LR  - 20181202
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 449
DP  - 2013 Apr 1
TI  - Modification of Pd-Fe nanoparticles for catalytic dechlorination of 
      2,4-dichlorophenol.
PG  - 157-67
LID - S0048-9697(13)00013-2 [pii]
LID - 10.1016/j.scitotenv.2013.01.008 [doi]
AB  - To reveal how different dispersants influence the dispersity and physicochemical 
      properties of palladium/iron nanoparticles (Pd/Fe NPs), we modified Pd/Fe NPs 
      with poly(methylmethacrylate) (PMMA), polyacrylic acid (PAA) and 
      cetyltrimethylammonium bromide (CTAB) respectively and obtained three hybrid NPs 
      denoted M-Pd/Fe NPs, A-Pd/Fe NPs and C-Pd/Fe NPs. The physical properties of the 
      three hybrid Pd/Fe NPs were studied, together with their behaviors in the 
      room-temperature dechlorination in aqueous solution of 2,4-dichlorophenol 
      (2,4-DCP). Dispersant effects of the three dispersants were observed, as well as 
      changes in the properties of resulted Pd/Fe NPs. The pristine Pd/Fe NPs 
      experienced more severe oxidation than A-Pd/Fe NPs, while there was no evidence 
      for the presence of oxidation phase of M-Pd/Fe NPs and C-Pd/Fe NPs. Degradation 
      results showed that compared with pristine Pd/Fe NPs, the catalytic 
      dechlorination efficiency of 2,4-DCP with modified Pd/Fe NPs increased by 23%-58% 
      within a given reaction period of 20 min. The role of dispersants themselves in 
      dechlorination properties of Pd/Fe NPs is more significant than that of volume 
      ratio of PAA to water, weight ratio of PMMA to anisole and volume ratio of water 
      to ethanol in determining the properties of A-Pd/Fe, M-Pd/Fe and C-Pd/Fe NPs, 
      respectively. Studies on the kinetics of 2,4-DCP reacted with Pd/Fe NPs in our 
      cases implied that their behaviors didn't match the first- or pseudo-first-order 
      kinetics: because the presence of oxidation phases on the surface of pristine 
      Pd/Fe NPs and the dispersants on the surface of NPs could influence the diffusion 
      of 2,4-DCP onto reactive sites, thus affecting the whole degradation process. So, 
      an innovatively revised kinetics was proposed in the study for considering the 
      effects of oxidation phases and the dispersants.
CI  - Copyright (c) 2013 Elsevier B.V. All rights reserved.
FAU - Wang, Xiangyu
AU  - Wang X
AD  - Faculty of Environmental Science and Engineering, Kunming University of Science 
      and Technology, Kunming 650500, China. famdct@sohu.com
FAU - Zhu, Minping
AU  - Zhu M
FAU - Liu, Huiling
AU  - Liu H
FAU - Ma, Jun
AU  - Ma J
FAU - Li, Fang
AU  - Li F
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130217
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Cetrimonium Compounds)
RN  - 0 (Chlorophenols)
RN  - 4R7X1O2820 (Chlorine)
RN  - 5TWQ1V240M (Palladium)
RN  - 9011-14-7 (Polymethyl Methacrylate)
RN  - E1UOL152H7 (Iron)
RN  - R669TG1950 (2,4-dichlorophenol)
RN  - Z7FF1XKL7A (Cetrimonium)
SB  - IM
MH  - Catalysis
MH  - Cetrimonium
MH  - Cetrimonium Compounds/chemistry
MH  - Chlorine/*chemistry
MH  - Chlorophenols/*chemistry
MH  - Iron/*chemistry
MH  - Kinetics
MH  - *Metal Nanoparticles
MH  - Microscopy, Electron, Scanning
MH  - Microscopy, Electron, Transmission
MH  - Palladium/*chemistry
MH  - Polymethyl Methacrylate/chemistry
EDAT- 2013/02/22 06:00
MHDA- 2013/08/31 06:00
CRDT- 2013/02/22 06:00
PHST- 2012/11/12 00:00 [received]
PHST- 2013/01/01 00:00 [revised]
PHST- 2013/01/01 00:00 [accepted]
PHST- 2013/02/22 06:00 [entrez]
PHST- 2013/02/22 06:00 [pubmed]
PHST- 2013/08/31 06:00 [medline]
AID - S0048-9697(13)00013-2 [pii]
AID - 10.1016/j.scitotenv.2013.01.008 [doi]
PST - ppublish
SO  - Sci Total Environ. 2013 Apr 1;449:157-67. doi: 10.1016/j.scitotenv.2013.01.008. 
      Epub 2013 Feb 17.