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(Pyrenetetrasulfonate/ZnS) n Ordered Ultrathin Films with ZnAl Layered Double Hydroxide as Precursor and Ethanol‐Sensing Properties
Author(s) -
Xiao YaPing,
Zhang LiMin,
Guo Ying,
Song YuFei
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300053
Subject(s) - chemistry , hydroxide , pyrene , deposition (geology) , ethanol , spectroscopy , chemical engineering , layer (electronics) , inorganic chemistry , nuclear chemistry , organic chemistry , paleontology , physics , quantum mechanics , sediment , engineering , biology
Well‐ordered ultrathin films (UTFs) of {pyrenetetrasulfonate(PyTS)/ZnS} n were fabricated by alternating assembly of 1,3,6,8‐PyTS and exfoliated Zn 2 Al layered double hydroxide (LDH) nanosheets through layer‐by‐layer (LBL) electrostatic deposition, followed by an effective in situ gas/solid sulfurization reaction with H 2 S. The assembly process was monitored by UV/Vis spectroscopy, which showed regular stepwise growth of the (PyTS/LDH) n UTFs with consecutive deposition cycles. It is worth noting that the structure of the well‐ordered UTFs is retained after the in situ gas/solid sulfurization reaction. Although both (PyTS/LDH) n UTFs and the sulfurized (PyTS/ZnS) n UTFs respond to ethanol at a relatively low operating temperature (70 °C), the (PyTS/ZnS) n UTFs exhibit a much better response, a fact that can be attributed to synergistic interactions between inorganic ZnS and organic pyrene components. Moreover, the well‐ordered (PyTS/ZnS) 30 UTF exhibits a stronger sensor response to ethanol than to other gases, including NH 3 , H 2 , CO, C 2 H 2 , and CH 4 .