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Asif Ali Khan - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and ion exchange properties of a fibrous type polymeric inorganic composite cation exchanger nylon 6 6 sn iv phosphate its application in making hg ii selective membrane electrode
    Electrochimica Acta, 2009
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    Abstract A polymeric-inorganic composite cation-exchanger, i.e. Nylon-6,6 Sn(IV) phosphate was synthesized via mixing of polymer Nylon-6,6 into the matrices of inorganic precipitate of Sn(IV) phosphate to form composite cation-exchanger. Ion-exchange capacity (IEC), ion-exchange properties, thermal stability and Distribution Behavior, etc. were also carried out to understand the cation-exchange Behavior of the material. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA-DTA, XRD, and SEM studies. On the basis of Distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Using this electroactive composite material, a new heterogeneous precipitate based selective membrane electrode was fabricated for the determination of Hg(II) ions in solutions. The membrane electrode is mechanically stable, with a quick response time, and can be operated within a wide pH range. The selectivity coefficients for different cations determined by mixed solution method were found to be less than unity. The electrode was also found to be satisfactory in potentiometric titrations.

  • synthesis characterization and ion exchange properties of a new and novel organic inorganic hybrid cation exchanger nylon 6 6 zr iv phosphate
    Talanta, 2007
    Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali Khan
    Abstract:

    Abstract Organic–inorganic hybrid materials enable the integration of useful organic and inorganic characteristics within a single molecular-scale composite. Unique ion-exchange properties of these types of materials have been observed, and many others can be envisioned for this promising class of materials. In this paper, we describe the ion-exchange and physico-chemical properties of one family of self-assembling organic–inorganic hybrid based on nylon-6,6, framework with Zr(IV) phosphate an inorganic ion-exchanger. The physico-chemical properties of this hybrid material were determined using atomic absorption spectrophotometry (AAS), CHN elemental analysis, ICP–MS, UV–vis spectrophotometry, FTIR, TGA–DTA and scanning electron microscope (SEM) studies. Ion-exchange capacity (IEC), thermal stability and Distribution Behavior, etc. were also carried out to understand the cation-exchange Behavior of the material. On the basis of Distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Its selectivity was examined by achieving some important binary separations like Hg(II)–Mg(II), Hg(II)–Zn(II), Hg(II)–Fe(III), Hg(II)–Bi(III), etc. Thus, the relatively new field of “organic–inorganic” hybrids offers a variety of exciting technological opportunities to decrease the environmental pollution.

  • preparation physico chemical characterization analytical applications and electrical conductivity measurement studies of an organic inorganic composite cation exchanger polyaniline sn iv phosphate
    Reactive & Functional Polymers, 2006
    Co-Authors: Asif Ali Khan
    Abstract:

    Abstract Polyaniline Sn(IV) phosphate, an ‘organic–inorganic’ composite material, was synthesized via sol–gel mixing of an electrically conducting organic polymer polyaniline into the matrices of inorganic precipitate of Sn(IV) phosphate. This material was used as a cation-exchanger. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, ICP-MS, UV–VIS spectrophotometry, FTIR, TGA–DTA, XRD, and SEM studies. Ion-exchange capacity, chemical stability, thermal stability and Distribution Behavior were also carried out to understand the cation-exchange Behavior of the material. On the basis of Distribution studies, the material was found to be highly selective for Pb(II). Its selectivity was examined by achieving some important binary separations like Pb(II)–Mg(II), Pb(II)–Sr(II), Pb(II)–Zn(II), and Pb(II)–Fe(III) on its column. This material possessed DC electrical conductivity in the semi-conducting range, i . e . 10 −5 –10 −3  S cm −1 . The stability in terms of DC electrical conductivity retention was also studied in an oxidative environment by two slightly different techniques viz . isothermal and cyclic techniques. The DC electrical conductivity of composite material was found stable upto 110 °C under ambient conditions.

Shakeel Ahmad Khan - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and ion exchange properties of a new and novel organic inorganic hybrid cation exchanger poly methyl methacrylate zr iv phosphate
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007
    Co-Authors: Weqar Ahmad Siddiqui, Shakeel Ahmad Khan
    Abstract:

    Abstract Incorporation of a polymer material into an inorganic ion exchanger provides a class of hybrid ion exchangers with a good ion exchange capacity, high stability and high selectivity for heavy metals. In the present study, a hybrid type of ion exchanger poly(methyl methacrylate) Zr(1V) phosphate has been synthesized by mixing poly(methyl methacrylate) (PMMA) into inorganic cation-exchange material Zr(IV) phosphate. The physicochemical properties of this hybrid material were determined using AAS, elemental analysis, ICP-MS, UV–vis spectrophotometry, Fourier transform infrared spectroscopy (FTIR), TGA-DTA and XRD studies. Ion-exchange capacity (IEC), chemical stability, thermal stability and Distribution Behavior, etc. studies were also carried out to understand the cation-exchange Behavior of the material. Sorption studies showed that the composite cation-exchanger has high selectivity to Pb(II) in comparison to other metal ions. Its selectivity was examined by achieving some important binary separations like Pb(II)–Mg(II), Pb(II)–Cd(II), Pb(II)–Hg(II), Pb(II)–Cu(II), and Cu(II)–Cd(II).

  • synthesis characterization and ion exchange properties of a new and novel organic inorganic hybrid cation exchanger nylon 6 6 zr iv phosphate
    Talanta, 2007
    Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali Khan
    Abstract:

    Abstract Organic–inorganic hybrid materials enable the integration of useful organic and inorganic characteristics within a single molecular-scale composite. Unique ion-exchange properties of these types of materials have been observed, and many others can be envisioned for this promising class of materials. In this paper, we describe the ion-exchange and physico-chemical properties of one family of self-assembling organic–inorganic hybrid based on nylon-6,6, framework with Zr(IV) phosphate an inorganic ion-exchanger. The physico-chemical properties of this hybrid material were determined using atomic absorption spectrophotometry (AAS), CHN elemental analysis, ICP–MS, UV–vis spectrophotometry, FTIR, TGA–DTA and scanning electron microscope (SEM) studies. Ion-exchange capacity (IEC), thermal stability and Distribution Behavior, etc. were also carried out to understand the cation-exchange Behavior of the material. On the basis of Distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Its selectivity was examined by achieving some important binary separations like Hg(II)–Mg(II), Hg(II)–Zn(II), Hg(II)–Fe(III), Hg(II)–Bi(III), etc. Thus, the relatively new field of “organic–inorganic” hybrids offers a variety of exciting technological opportunities to decrease the environmental pollution.

Tabassum Akhtar - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and ion exchange properties of a fibrous type polymeric inorganic composite cation exchanger nylon 6 6 sn iv phosphate its application in making hg ii selective membrane electrode
    Electrochimica Acta, 2009
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    Abstract A polymeric-inorganic composite cation-exchanger, i.e. Nylon-6,6 Sn(IV) phosphate was synthesized via mixing of polymer Nylon-6,6 into the matrices of inorganic precipitate of Sn(IV) phosphate to form composite cation-exchanger. Ion-exchange capacity (IEC), ion-exchange properties, thermal stability and Distribution Behavior, etc. were also carried out to understand the cation-exchange Behavior of the material. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA-DTA, XRD, and SEM studies. On the basis of Distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Using this electroactive composite material, a new heterogeneous precipitate based selective membrane electrode was fabricated for the determination of Hg(II) ions in solutions. The membrane electrode is mechanically stable, with a quick response time, and can be operated within a wide pH range. The selectivity coefficients for different cations determined by mixed solution method were found to be less than unity. The electrode was also found to be satisfactory in potentiometric titrations.

Weqar Ahmad Siddiqui - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and ion exchange properties of a new and novel organic inorganic hybrid cation exchanger poly methyl methacrylate zr iv phosphate
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007
    Co-Authors: Weqar Ahmad Siddiqui, Shakeel Ahmad Khan
    Abstract:

    Abstract Incorporation of a polymer material into an inorganic ion exchanger provides a class of hybrid ion exchangers with a good ion exchange capacity, high stability and high selectivity for heavy metals. In the present study, a hybrid type of ion exchanger poly(methyl methacrylate) Zr(1V) phosphate has been synthesized by mixing poly(methyl methacrylate) (PMMA) into inorganic cation-exchange material Zr(IV) phosphate. The physicochemical properties of this hybrid material were determined using AAS, elemental analysis, ICP-MS, UV–vis spectrophotometry, Fourier transform infrared spectroscopy (FTIR), TGA-DTA and XRD studies. Ion-exchange capacity (IEC), chemical stability, thermal stability and Distribution Behavior, etc. studies were also carried out to understand the cation-exchange Behavior of the material. Sorption studies showed that the composite cation-exchanger has high selectivity to Pb(II) in comparison to other metal ions. Its selectivity was examined by achieving some important binary separations like Pb(II)–Mg(II), Pb(II)–Cd(II), Pb(II)–Hg(II), Pb(II)–Cu(II), and Cu(II)–Cd(II).

  • synthesis characterization and ion exchange properties of a new and novel organic inorganic hybrid cation exchanger nylon 6 6 zr iv phosphate
    Talanta, 2007
    Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali Khan
    Abstract:

    Abstract Organic–inorganic hybrid materials enable the integration of useful organic and inorganic characteristics within a single molecular-scale composite. Unique ion-exchange properties of these types of materials have been observed, and many others can be envisioned for this promising class of materials. In this paper, we describe the ion-exchange and physico-chemical properties of one family of self-assembling organic–inorganic hybrid based on nylon-6,6, framework with Zr(IV) phosphate an inorganic ion-exchanger. The physico-chemical properties of this hybrid material were determined using atomic absorption spectrophotometry (AAS), CHN elemental analysis, ICP–MS, UV–vis spectrophotometry, FTIR, TGA–DTA and scanning electron microscope (SEM) studies. Ion-exchange capacity (IEC), thermal stability and Distribution Behavior, etc. were also carried out to understand the cation-exchange Behavior of the material. On the basis of Distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Its selectivity was examined by achieving some important binary separations like Hg(II)–Mg(II), Hg(II)–Zn(II), Hg(II)–Fe(III), Hg(II)–Bi(III), etc. Thus, the relatively new field of “organic–inorganic” hybrids offers a variety of exciting technological opportunities to decrease the environmental pollution.

Mu Naushad - One of the best experts on this subject based on the ideXlab platform.

  • development characterization and ion exchange thermodynamics for a new crystalline composite cation exchange material application for the removal of pb2 ion from a standard sample rompin hematite
    Journal of Inorganic and Organometallic Polymers and Materials, 2011
    Co-Authors: Z A Alothman, Mu Naushad, A Nilchi
    Abstract:

    A new crystalline organic–inorganic composite cation exchanger polyaniline Sn(IV) molybdate was developed by mixing polyaniline into the inorganic precipitate of Sn(IV) molybdate. This material was characterized using Fourier transform infrared spectroscopy (FTIR), simultaneous thermogravimetry–differential thermogravimetry (TGA–DTA), X-ray, scanning electron microscopy (SEM) and elemental analysis studies. Ion-exchange capacity, effect of calcinations (100–500 °C) on ion exchange capacity, pH-titrations, chemical stability, elution and Distribution Behavior were also carried on this material. On the basis of Distribution studies, the material was found to be highly selective for Pb2+ ion and its selectivity was tested by achieving some important binary and ternary separations. In order to demonstrate the practical utility of the material, quantitative separations of Pb2+ from a standard reference material (Rompin Hematite) of lead have been achieved. Thermodynamic parameters viz- entropy change (ΔS), enthalpy change (ΔH) and Gibb’s free energy change (ΔG) were also calculated.

  • synthesis and characterization of a new organic inorganic pb2 selective composite cation exchanger acrylonitrile stannic iv tungstate and its analytical applications
    Chemical Engineering Journal, 2009
    Co-Authors: Syed Ashfaq Nabi, Mu Naushad, Rani Bushra
    Abstract:

    A new polymeric–inorganic cation exchanger acrylonitrile stannic(IV) tungstate composite was synthesized by sol–gel technique by incorporating stannic(IV) tungstate precipitate with acrylonitrile. Composite materials formed by the combination of inorganic ion exchangers of multivalent metal acid salts and organic polymers (acrylonitrile, cellulose acetate, polyaniline, polypyrrole, polythiophene, etc.), providing a new class of ‘organic–inorganic’ composite exchangers with better mechanical and granulometric properties, good ion exchange capacity, higher stability, reproducibility and selectivity for heavy metals. The physico-chemical characterization was carried out by elemental analysis, TGA, SEM, XRD, FTIR and TEM studies. Ion exchange capacity, pH titrations, elution and Distribution Behavior were also carried out to understand the ion exchange Behavior of the material. The adsorption Behavior of heavy metal ions has been reported in nitric acid and two surfactants media by batch processes. The analytical applications of the material have been explored by achieving some analytically important binary separations from aqueous solution on its columns. The practical applicability of acrylonitrile stannic(IV) tungstate was demonstrated in the quantitative separation of Fe3+and Zn2+ contents of a commercially available pharmaceutical sample namely Fefol-Z.

  • synthesis characterization and analytical applications of a new composite cation exchanger cellulose acetate zr iv molybdophosphate
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2008
    Co-Authors: Syed Ashfaq Nabi, Mu Naushad
    Abstract:

    Abstract A new composite cation exchanger cellulose acetate-Zr(IV) molybdophosphate was synthesized because composite materials formed by the combination of inorganic ion exchangers of multivalent metal acid salts and organic polymers (cellulose acetate, polyaniline, polythiophene, polypyrrole, Nylon 6,6, etc.), providing a new class of ‘organic–inorganic’ composite ion exchangers with better mechanical and granulometric properties, good ion exchange capacity, reproducibility, higher stability and selectivity for heavy metals. The physico-chemical properties of this material were determined using some instrumental analyses viz. FTIR, X-ray, TGA–DTA and SEM. Ion exchange capacity, pH titrations, elution and Distribution Behavior were also carried out to understand the ion exchange Behavior of the material. Its selectivity was examined by achieving some important binary separations like Mg(II)–Ca(II), Zn(II)–Ca(III), Fe(III)–Cr(III), Zn(II)–Cr(III), Cd(II)–Hg(II), Cd(II)–Cr(III) on its column. This new exchanger was offered a variety of technological opportunity for quantitative determination and separation of Cr 3+ from a synthetic mixture of metal ions and Ca 2+ from commercially available vitamin and minerals formulation namely Recovit.