Organic-inorganic hybrid mesoporous monoliths for selective discrimination and sensitive removal of toxic mercury ions

Sherif A. El-Safty

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The selective optical sensing is attracting strong interest due to the use of "low-tech" spectroscopic instrumentation to detect relevant chemical species in biological and environmental processes. Our development has focused on tailoring specific solid mesoporous monoliths to be used as highly sensitive solid sensors for simple and simultaneous naked-eye detection and removal processes of extremely toxic heavy metal ions such as mercury ions in aquatic samples. The methods are emerging to design optical disc-like sensors by the immobilisation two different organic groups; however, the first organic moiety can enhance the polarity of the inorganic mesoporous disc-like monoliths "additional agents" and the second one can act as a recognition center "probe". The latter one such as tetraphenylporphine tetrasulfonic acid (TPPS) probe led to facile handling of signal read-out with visual detection of ultra-trace concentrations of mercury ions at the same frequency as the human eye. The facile signaling was quantitatively evident using simple spectrophotometric techniques to indicate the TPPS-Hg(II) ion binding events. Control sensing assays of Hg(II) ions such as contact-time "signal response time", thickness of support-based sensor, reaction temperature, and pH were established for achieving enhanced signal response and color intensities. Based on our results, these new classes of optical cage sensors exhibited long-term stability of recognition and signaling functionalities of Hg(II) ions that in general provided extraordinary sensitivity, selectivity, reusability, and fast kinetic detection and quantification of Hg(II) ions in our environment.

Original languageEnglish
Pages (from-to)6764-6774
Number of pages11
JournalJournal of Materials Science
Volume44
Issue number24
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

Poisons
Mercury
Ions
Sensors
Acids
Optical design
Mercury (metal)
Reusability
Heavy Metals
Heavy ions
Heavy metals
Metal ions
Assays
Color
Kinetics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Organic-inorganic hybrid mesoporous monoliths for selective discrimination and sensitive removal of toxic mercury ions. / El-Safty, Sherif A.

In: Journal of Materials Science, Vol. 44, No. 24, 2009, p. 6764-6774.

Research output: Contribution to journalArticle

@article{fc1bec346db847e1857aec0b0dd98a32,
title = "Organic-inorganic hybrid mesoporous monoliths for selective discrimination and sensitive removal of toxic mercury ions",
abstract = "The selective optical sensing is attracting strong interest due to the use of {"}low-tech{"} spectroscopic instrumentation to detect relevant chemical species in biological and environmental processes. Our development has focused on tailoring specific solid mesoporous monoliths to be used as highly sensitive solid sensors for simple and simultaneous naked-eye detection and removal processes of extremely toxic heavy metal ions such as mercury ions in aquatic samples. The methods are emerging to design optical disc-like sensors by the immobilisation two different organic groups; however, the first organic moiety can enhance the polarity of the inorganic mesoporous disc-like monoliths {"}additional agents{"} and the second one can act as a recognition center {"}probe{"}. The latter one such as tetraphenylporphine tetrasulfonic acid (TPPS) probe led to facile handling of signal read-out with visual detection of ultra-trace concentrations of mercury ions at the same frequency as the human eye. The facile signaling was quantitatively evident using simple spectrophotometric techniques to indicate the TPPS-Hg(II) ion binding events. Control sensing assays of Hg(II) ions such as contact-time {"}signal response time{"}, thickness of support-based sensor, reaction temperature, and pH were established for achieving enhanced signal response and color intensities. Based on our results, these new classes of optical cage sensors exhibited long-term stability of recognition and signaling functionalities of Hg(II) ions that in general provided extraordinary sensitivity, selectivity, reusability, and fast kinetic detection and quantification of Hg(II) ions in our environment.",
author = "El-Safty, {Sherif A.}",
year = "2009",
doi = "10.1007/s10853-009-3577-6",
language = "English",
volume = "44",
pages = "6764--6774",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "24",

}

TY - JOUR

T1 - Organic-inorganic hybrid mesoporous monoliths for selective discrimination and sensitive removal of toxic mercury ions

AU - El-Safty, Sherif A.

PY - 2009

Y1 - 2009

N2 - The selective optical sensing is attracting strong interest due to the use of "low-tech" spectroscopic instrumentation to detect relevant chemical species in biological and environmental processes. Our development has focused on tailoring specific solid mesoporous monoliths to be used as highly sensitive solid sensors for simple and simultaneous naked-eye detection and removal processes of extremely toxic heavy metal ions such as mercury ions in aquatic samples. The methods are emerging to design optical disc-like sensors by the immobilisation two different organic groups; however, the first organic moiety can enhance the polarity of the inorganic mesoporous disc-like monoliths "additional agents" and the second one can act as a recognition center "probe". The latter one such as tetraphenylporphine tetrasulfonic acid (TPPS) probe led to facile handling of signal read-out with visual detection of ultra-trace concentrations of mercury ions at the same frequency as the human eye. The facile signaling was quantitatively evident using simple spectrophotometric techniques to indicate the TPPS-Hg(II) ion binding events. Control sensing assays of Hg(II) ions such as contact-time "signal response time", thickness of support-based sensor, reaction temperature, and pH were established for achieving enhanced signal response and color intensities. Based on our results, these new classes of optical cage sensors exhibited long-term stability of recognition and signaling functionalities of Hg(II) ions that in general provided extraordinary sensitivity, selectivity, reusability, and fast kinetic detection and quantification of Hg(II) ions in our environment.

AB - The selective optical sensing is attracting strong interest due to the use of "low-tech" spectroscopic instrumentation to detect relevant chemical species in biological and environmental processes. Our development has focused on tailoring specific solid mesoporous monoliths to be used as highly sensitive solid sensors for simple and simultaneous naked-eye detection and removal processes of extremely toxic heavy metal ions such as mercury ions in aquatic samples. The methods are emerging to design optical disc-like sensors by the immobilisation two different organic groups; however, the first organic moiety can enhance the polarity of the inorganic mesoporous disc-like monoliths "additional agents" and the second one can act as a recognition center "probe". The latter one such as tetraphenylporphine tetrasulfonic acid (TPPS) probe led to facile handling of signal read-out with visual detection of ultra-trace concentrations of mercury ions at the same frequency as the human eye. The facile signaling was quantitatively evident using simple spectrophotometric techniques to indicate the TPPS-Hg(II) ion binding events. Control sensing assays of Hg(II) ions such as contact-time "signal response time", thickness of support-based sensor, reaction temperature, and pH were established for achieving enhanced signal response and color intensities. Based on our results, these new classes of optical cage sensors exhibited long-term stability of recognition and signaling functionalities of Hg(II) ions that in general provided extraordinary sensitivity, selectivity, reusability, and fast kinetic detection and quantification of Hg(II) ions in our environment.

UR - http://www.scopus.com/inward/record.url?scp=72049114428&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=72049114428&partnerID=8YFLogxK

U2 - 10.1007/s10853-009-3577-6

DO - 10.1007/s10853-009-3577-6

M3 - Article

AN - SCOPUS:72049114428

VL - 44

SP - 6764

EP - 6774

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 24

ER -