Mesoporous Silver–Melamine Nanowires Formed
by Controlled Supermolecular Self-Assembly: A Selective Solid-State
Electroanalysis for Probing Multiple Sulfides in Hyperhaline Media
through the Specific Sulfide–Chloride Replacement Reactions
Version 2 2017-08-21, 18:37
Version 1 2017-08-21, 18:35
Posted on 2017-08-21 - 18:37
Mesoporous
silver–melamine (Ag–MA) nanocomposites
were synthesized simply by the controlled supermolecular self-assembly
process to be modified onto the electrodes for the electroanalysis
of multiple sulfides in blood or wastewater. It was discovered that
Ag–MA nanocomposites could be prepared with various morphological
structures depending on the Ag-to-MA ratios. Furthermore, the electrodes
modified with mesoporous Ag–MA nanowires could display stable
and sharp electrochemical peaks of solid-state AgCl at a considerably
low potential approaching zero, thus circumventing any interference
from possibly coexisting electroactive substances in the background.
More importantly, the yielded AgCl signals would decrease selectively
induced by sulfides through the specific sulfide–chloride replacement
reactions toward the transferring of AgCl into non-electroactive Ag2S. The developed electroanalysis strategy could facilitate
the selective detection of multiple sulfides (i.e., S2– or H2S, Sx2–, cysteine, and S2O32–) in
the complicated media with high-level salts such as blood and wastewater,
showing a linear concentration range from 0.50 to 512 μM as
exemplified for S2– ions in blood. Such an electroanalysis
device equipped with the portable electrochemical transducer can be
tailored for the field-deployable monitoring of a variety of sulfides
in clinical and environmental analysis fields.
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Liu, Min; Zhang, Liyan; Hua, Yue; Feng, Luping; Jiang, Yao; Ding, Xiju; et al. (2017). Mesoporous Silver–Melamine Nanowires Formed
by Controlled Supermolecular Self-Assembly: A Selective Solid-State
Electroanalysis for Probing Multiple Sulfides in Hyperhaline Media
through the Specific Sulfide–Chloride Replacement Reactions. ACS Publications. Collection. https://doi.org/10.1021/acs.analchem.7b02619
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AUTHORS (8)
ML
Min Liu
LZ
Liyan Zhang
YH
Yue Hua
LF
Luping Feng
YJ
Yao Jiang
XD
Xiju Ding
WQ
Wei Qi
HW
Hua Wang
KEYWORDS
Controlled Supermolecular Self-Assemblynanocompositefield-deployable monitoringconcentration rangeelectroanalysis deviceelectrochemical peakssulfideelectrodeAgCl signalssupermolecular self-assembly process512 μ MMultiple Sulfidescoexisting electroactive substancesHyperhaline Mediaanalysis fieldselectroanalysis strategyH 2 Selectrochemical transducernon-electroactive Ag 2 SSelective Solid-State ElectroanalysisAg-to-MA ratiosMesoporouwastewater