Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions

Sherif A. El-Safty, M. A. Shenashen, M. Ismael, M. Khairy, Md R. Awual

    Research output: Contribution to journalArticle

    89 Citations (Scopus)

    Abstract

    A general design for optical chemical nanosensors is necessary for the development of efficient sensing systems with high flexibility and low capital cost for the controlled recognition of heavy and toxic metals. In the present work, we designed optical chemical nanosensors for the colorimetric recognition and simultaneous removal of Cu(II) and Pd(II) ions. The optical nanosensors were designed by direct immobilization of a synthesized N,N′-disalicylidene-4, 5-diamino-6-hydroxy-2-mercaptopyrimidine (DSAHMP) chelate onto hexagonal mesoporous aluminosilica carriers. The natural surfaces and active acid sites of the aluminosilicas strongly induced H-bonding and dispersive interactions with the DSAHMP chelate, leading to the formation of stable sensors without leaching of the chelate during sensing assays of metal ions. No elution of the probe molecules was evident with the addition of Cu(II) and Pd(II) analyte ions during the sensing process. In addition, the structural features of the open-pore, hexagonal mesostructures led to high rates of accessibility and adsorption capacity of the DSAHMP chelate. Within such a tailored nanosensor design, the ability to achieve flexibility in the specific activity of the electron acceptor/donor strength of the chemically responsive DSAHMP molecular probe enabled easy generation and transduction of optical color signals as a response to DSAHMP-Cu(II) or DSAHMP-Pd(II) binding events, even at ultra-trace concentrations (10 -9 mol/dm 3) of heavy metals. The functional and solid design of the nanosensors offered a simple, one-step sensing procedure for both the quantitate and visual detection of such elements from their sources without the need for sophisticated instruments. Controlled sensing and removal assays significantly enhanced nanosensor functionality in terms of long-term stability, reversibility, and selectivity. The key result in our study is that the design-made nanosensors exhibited significant ion-selectivity toward the target ions in environmental and waste disposal samples.

    Original languageEnglish
    Pages (from-to)195-205
    Number of pages11
    JournalMicroporous and Mesoporous Materials
    Volume166
    DOIs
    Publication statusPublished - 2013 Jan 15

    Fingerprint

    Nanosensors
    Ions
    chelates
    sensors
    Sensors
    ions
    heavy metals
    flexibility
    selectivity
    Assays
    waste disposal
    elution
    probes
    disposal
    Molecular Probes
    leaching
    immobilization
    Poisons
    Heavy Metals
    metal ions

    Keywords

    • Copper
    • Mesoporous aluminosilica
    • Optical sensor
    • Palladium
    • Removal

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Chemistry(all)
    • Condensed Matter Physics

    Cite this

    Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions. / El-Safty, Sherif A.; Shenashen, M. A.; Ismael, M.; Khairy, M.; Awual, Md R.

    In: Microporous and Mesoporous Materials, Vol. 166, 15.01.2013, p. 195-205.

    Research output: Contribution to journalArticle

    El-Safty, Sherif A. ; Shenashen, M. A. ; Ismael, M. ; Khairy, M. ; Awual, Md R. / Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions. In: Microporous and Mesoporous Materials. 2013 ; Vol. 166. pp. 195-205.
    @article{85a4000eac734b30bc4616536857c592,
    title = "Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions",
    abstract = "A general design for optical chemical nanosensors is necessary for the development of efficient sensing systems with high flexibility and low capital cost for the controlled recognition of heavy and toxic metals. In the present work, we designed optical chemical nanosensors for the colorimetric recognition and simultaneous removal of Cu(II) and Pd(II) ions. The optical nanosensors were designed by direct immobilization of a synthesized N,N′-disalicylidene-4, 5-diamino-6-hydroxy-2-mercaptopyrimidine (DSAHMP) chelate onto hexagonal mesoporous aluminosilica carriers. The natural surfaces and active acid sites of the aluminosilicas strongly induced H-bonding and dispersive interactions with the DSAHMP chelate, leading to the formation of stable sensors without leaching of the chelate during sensing assays of metal ions. No elution of the probe molecules was evident with the addition of Cu(II) and Pd(II) analyte ions during the sensing process. In addition, the structural features of the open-pore, hexagonal mesostructures led to high rates of accessibility and adsorption capacity of the DSAHMP chelate. Within such a tailored nanosensor design, the ability to achieve flexibility in the specific activity of the electron acceptor/donor strength of the chemically responsive DSAHMP molecular probe enabled easy generation and transduction of optical color signals as a response to DSAHMP-Cu(II) or DSAHMP-Pd(II) binding events, even at ultra-trace concentrations (10 -9 mol/dm 3) of heavy metals. The functional and solid design of the nanosensors offered a simple, one-step sensing procedure for both the quantitate and visual detection of such elements from their sources without the need for sophisticated instruments. Controlled sensing and removal assays significantly enhanced nanosensor functionality in terms of long-term stability, reversibility, and selectivity. The key result in our study is that the design-made nanosensors exhibited significant ion-selectivity toward the target ions in environmental and waste disposal samples.",
    keywords = "Copper, Mesoporous aluminosilica, Optical sensor, Palladium, Removal",
    author = "El-Safty, {Sherif A.} and Shenashen, {M. A.} and M. Ismael and M. Khairy and Awual, {Md R.}",
    year = "2013",
    month = "1",
    day = "15",
    doi = "10.1016/j.micromeso.2012.03.021",
    language = "English",
    volume = "166",
    pages = "195--205",
    journal = "Microporous and Mesoporous Materials",
    issn = "1387-1811",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Mesoporous aluminosilica sensors for the visual removal and detection of Pd(II) and Cu(II) ions

    AU - El-Safty, Sherif A.

    AU - Shenashen, M. A.

    AU - Ismael, M.

    AU - Khairy, M.

    AU - Awual, Md R.

    PY - 2013/1/15

    Y1 - 2013/1/15

    N2 - A general design for optical chemical nanosensors is necessary for the development of efficient sensing systems with high flexibility and low capital cost for the controlled recognition of heavy and toxic metals. In the present work, we designed optical chemical nanosensors for the colorimetric recognition and simultaneous removal of Cu(II) and Pd(II) ions. The optical nanosensors were designed by direct immobilization of a synthesized N,N′-disalicylidene-4, 5-diamino-6-hydroxy-2-mercaptopyrimidine (DSAHMP) chelate onto hexagonal mesoporous aluminosilica carriers. The natural surfaces and active acid sites of the aluminosilicas strongly induced H-bonding and dispersive interactions with the DSAHMP chelate, leading to the formation of stable sensors without leaching of the chelate during sensing assays of metal ions. No elution of the probe molecules was evident with the addition of Cu(II) and Pd(II) analyte ions during the sensing process. In addition, the structural features of the open-pore, hexagonal mesostructures led to high rates of accessibility and adsorption capacity of the DSAHMP chelate. Within such a tailored nanosensor design, the ability to achieve flexibility in the specific activity of the electron acceptor/donor strength of the chemically responsive DSAHMP molecular probe enabled easy generation and transduction of optical color signals as a response to DSAHMP-Cu(II) or DSAHMP-Pd(II) binding events, even at ultra-trace concentrations (10 -9 mol/dm 3) of heavy metals. The functional and solid design of the nanosensors offered a simple, one-step sensing procedure for both the quantitate and visual detection of such elements from their sources without the need for sophisticated instruments. Controlled sensing and removal assays significantly enhanced nanosensor functionality in terms of long-term stability, reversibility, and selectivity. The key result in our study is that the design-made nanosensors exhibited significant ion-selectivity toward the target ions in environmental and waste disposal samples.

    AB - A general design for optical chemical nanosensors is necessary for the development of efficient sensing systems with high flexibility and low capital cost for the controlled recognition of heavy and toxic metals. In the present work, we designed optical chemical nanosensors for the colorimetric recognition and simultaneous removal of Cu(II) and Pd(II) ions. The optical nanosensors were designed by direct immobilization of a synthesized N,N′-disalicylidene-4, 5-diamino-6-hydroxy-2-mercaptopyrimidine (DSAHMP) chelate onto hexagonal mesoporous aluminosilica carriers. The natural surfaces and active acid sites of the aluminosilicas strongly induced H-bonding and dispersive interactions with the DSAHMP chelate, leading to the formation of stable sensors without leaching of the chelate during sensing assays of metal ions. No elution of the probe molecules was evident with the addition of Cu(II) and Pd(II) analyte ions during the sensing process. In addition, the structural features of the open-pore, hexagonal mesostructures led to high rates of accessibility and adsorption capacity of the DSAHMP chelate. Within such a tailored nanosensor design, the ability to achieve flexibility in the specific activity of the electron acceptor/donor strength of the chemically responsive DSAHMP molecular probe enabled easy generation and transduction of optical color signals as a response to DSAHMP-Cu(II) or DSAHMP-Pd(II) binding events, even at ultra-trace concentrations (10 -9 mol/dm 3) of heavy metals. The functional and solid design of the nanosensors offered a simple, one-step sensing procedure for both the quantitate and visual detection of such elements from their sources without the need for sophisticated instruments. Controlled sensing and removal assays significantly enhanced nanosensor functionality in terms of long-term stability, reversibility, and selectivity. The key result in our study is that the design-made nanosensors exhibited significant ion-selectivity toward the target ions in environmental and waste disposal samples.

    KW - Copper

    KW - Mesoporous aluminosilica

    KW - Optical sensor

    KW - Palladium

    KW - Removal

    UR - http://www.scopus.com/inward/record.url?scp=84869082903&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84869082903&partnerID=8YFLogxK

    U2 - 10.1016/j.micromeso.2012.03.021

    DO - 10.1016/j.micromeso.2012.03.021

    M3 - Article

    AN - SCOPUS:84869082903

    VL - 166

    SP - 195

    EP - 205

    JO - Microporous and Mesoporous Materials

    JF - Microporous and Mesoporous Materials

    SN - 1387-1811

    ER -