PMID- 30173517
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20181126
LR  - 20181126
IS  - 1520-5827 (Electronic)
IS  - 0743-7463 (Linking)
VI  - 34
IP  - 38
DP  - 2018 Sep 25
TI  - Ag Nanoparticle-Induced Oxidative Dimerization of Thiophenols: Efficiency and 
      Mechanism.
PG  - 11347-11353
LID - 10.1021/acs.langmuir.8b02068 [doi]
AB  - By oxidation of silver nanoparticles (AgNPs) in two ways: thermal oxidation (TO) 
      in molecular oxygen and cool oxidation in oxygen plasma (i.e., oxygen plasma 
      irradiation, OPI), the efficiency and mechanism of visible light-induced 
      selective transformation of 4-aminothiophenol (PATP) to 4,4'-dimercaptoazobenzene 
      (DMAB) on the surface of AgNPs was explored. On the basis of the evolution of 
      surface-enhanced Raman scattering (SERS) spectrum of PATP (10(-5) M in ethanol) 
      with the oxidation time, it can be concluded that OPI could improve the selective 
      transformation efficiency (eta) effectively, by 87 times for only 2 s; whereas TO 
      could improve eta conditionally, increasing at first and then decreasing gradually 
      to zero. The results imply that silver oxide is not the root cause of the 
      increased eta. Combined with the results of SERS of oxygen species on the surface 
      of AgNPs processed by the above-mentioned two ways, superoxide (O(2)(-)) and 
      electrophilic oxygen atoms (O(-)) are suggested to be responsible for this 
      selective transformation. Our study deepens the understanding of the mechanism of 
      plasmonic photocatalysis and the role of silver oxide in selection transformation 
      of organic molecules.
FAU - Li, Huanhuan
AU  - Li H
FAU - Si, Mengting
AU  - Si M
FAU - Liu, Lihua
AU  - Liu L
FAU - Chu, Xiangqian
AU  - Chu X
FAU - Wang, Shuai
AU  - Wang S
FAU - Wan, Lei
AU  - Wan L
FAU - Yan, Rong
AU  - Yan R
AD  - Institute of Plasma Physics , Chinese Academy of Sciences , Hefei 230031 , China.
FAU - Sun, Mengtao
AU  - Sun M
AUID- ORCID: 0000-0002-8153-2679
AD  - School of Mathematics and Physics , University of Science and Technology Beijing 
      , Beijing 100083 , China.
FAU - Fang, Yingcui
AU  - Fang Y
AUID- ORCID: 0000-0001-9569-8488
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20180913
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
EDAT- 2018/09/04 06:00
MHDA- 2018/09/04 06:01
CRDT- 2018/09/04 06:00
PHST- 2018/09/04 06:00 [pubmed]
PHST- 2018/09/04 06:01 [medline]
PHST- 2018/09/04 06:00 [entrez]
AID - 10.1021/acs.langmuir.8b02068 [doi]
PST - ppublish
SO  - Langmuir. 2018 Sep 25;34(38):11347-11353. doi: 10.1021/acs.langmuir.8b02068. Epub 
      2018 Sep 13.