The Experts below are selected from a list of 816 Experts worldwide ranked by ideXlab platform
Asif Ali Khan - One of the best experts on this subject based on the ideXlab platform.
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an advanced nano composite catIon Exchanger polypyrrole zirconium titanium phosphate as a th iv selective potentiometric sensor preparatIon characterizatIon and its analytical applicatIon
Journal of Materials Science, 2010Co-Authors: Asif Ali Khan, Leena Paquiza, Anish KhanAbstract:Polypyrrole has emerged as one of the highly pursued conducting polymers owing to its high electrical conductivity and good environmental stability. In spite of its excellent electrical properties, the chemical and thermal stability and processability are not very satisfactory. The incorporatIon of a polymer material into an Inorganic Ion-Exchanger provides a high class of hybrid Ion-Exchangers with enhanced Ion-exchange properties, high reproducibility, high stability, and good selectivity for heavy metals. A novel organic–Inorganic composite-polypyrrole zirconium titanium phosphate has been synthesized using zirconium titanium phosphate, which is an advanced Inorganic Ion-exchange material with the qualities listed above. The physicochemical properties of this composite material are characterized by X-ray, TGA–DTA, AAS, FTIR, SEM, and TEM. The Ion-exchange capacity, pH titratIons, elutIon, and chemical stability were determined to study Ion-exchange properties of the material. DistributIon studies for various metal Ions revealed that the nano-composite is highly selective for Th(IV). An Ion-selective membrane electrode was fabricated using this material for the determinatIon of Th(IV) Ions in solutIons. The analytical utility of this electrode was established by employing it as an indicator electrode in electrometric titratIons.
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synthesis characterizatIon and Ion exchange properties of a new and novel organic Inorganic hybrid catIon Exchanger nylon 6 6 zr iv phosphate
Talanta, 2007Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali KhanAbstract: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.
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Ion exchange kinetics and electrical conductivity studies of polyaniline sn iv tungstoarsenate sno2 wo3 as2o5 4 c6h5nh 2 nh2o a new semi crystalline polymeric Inorganic composite catIon exchange material
Electrochimica Acta, 2003Co-Authors: Asif Ali Khan, M M Alam, Firoz MohammadAbstract:A new and novel electrically conducting ‘polymeric–Inorganic’ composite catIon-exchange material; polyaniline Sn(IV) tungstoarsenate was prepared by incorporating polyaniline into Inorganic Ion-Exchanger material. It possessed improved Ion-exchange capacity, high chemical and thermal stabilities, reproducibility and selectivity for some specific metal Ions. Kinetic study of exchange for some divalent metal Ions of alkaline earths and transitIon metals was carried out under the conditIons favoring a particle diffusIon-controlled Ion-exchange phenomenon and some physical parameters such as self diffusIon coefficient D0, energy of activatIon Ea and entropy of activatIon ΔS* were determined. The temperature dependence of electrical conductivity of this composite material with increasing temperatures was measured by using 4-in-line-probe DC electrical conductivity measuring-technique. The conductivity values lie in the semiconductor regIon, i.e. in the range of 10−3 S cm−1 that follow the Arrhenius equatIon. The energy of activatIon of electrical conductIon for the composite was also calculated.
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synthesis and Ion exchange behaviour of polyaniline sn iv arsenophosphate a polymeric Inorganic Ion Exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1999Co-Authors: Ram Niwas, Asif Ali Khan, K. G. VarshneyAbstract: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, reproducibility and selectivity for heavy metals. Such a type of Ion Exchanger ‘polyaniline Sn(IV) arsenophosphate’ has been synthesized by mixing polyaniline into Inorganic material. This material is characterized using X-ray, IR, TGA studies in additIon to Ion exchange capacity, pH-titratIon, elutIon and distributIon behaviour. On the basis of distributIon studies, the material has been found to be highly selective for Pb(II). Kinetic study of exchange for the metal Ions has been performed and some physical parameters such as self diffusIon coefficient D0, energy Ea and entropy ΔS* of activatIon have been determined.
K. G. Varshney - One of the best experts on this subject based on the ideXlab platform.
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the adsorptIon of phosphamidon on the surface of styrene supported zirconium iv tungstophosphate a thermodynamic study
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000Co-Authors: Ram Niwas, Upma Gupta, Asif Khan, K. G. VarshneyAbstract:AdsorptIon thermodynamics has been studied on the beads of hybrid Inorganic Ion Exchanger: styrene supported zirconium (IV) tungstophosphate for a pesticide phosphamidon at 30, 45 and 60°C. As a result some thermodynamic parameters like Freundlich constants, thermodynamic equilibrium constant (K0), standard free energy changes (ΔG0), standard enthalpy change (ΔH0) and standard entropy changes (ΔS0) have been evaluated.
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synthesis and Ion exchange behaviour of polyaniline sn iv arsenophosphate a polymeric Inorganic Ion Exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1999Co-Authors: Ram Niwas, Asif Ali Khan, K. G. VarshneyAbstract: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, reproducibility and selectivity for heavy metals. Such a type of Ion Exchanger ‘polyaniline Sn(IV) arsenophosphate’ has been synthesized by mixing polyaniline into Inorganic material. This material is characterized using X-ray, IR, TGA studies in additIon to Ion exchange capacity, pH-titratIon, elutIon and distributIon behaviour. On the basis of distributIon studies, the material has been found to be highly selective for Pb(II). Kinetic study of exchange for the metal Ions has been performed and some physical parameters such as self diffusIon coefficient D0, energy Ea and entropy ΔS* of activatIon have been determined.
Shakeel Ahmad Khan - One of the best experts on this subject based on the ideXlab platform.
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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, 2007Co-Authors: Weqar Ahmad Siddiqui, Shakeel Ahmad KhanAbstract: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).
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synthesis characterizatIon and Ion exchange properties of a new and novel organic Inorganic hybrid catIon Exchanger nylon 6 6 zr iv phosphate
Talanta, 2007Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali KhanAbstract: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.
Ram Niwas - One of the best experts on this subject based on the ideXlab platform.
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the adsorptIon of phosphamidon on the surface of styrene supported zirconium iv tungstophosphate a thermodynamic study
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000Co-Authors: Ram Niwas, Upma Gupta, Asif Khan, K. G. VarshneyAbstract:AdsorptIon thermodynamics has been studied on the beads of hybrid Inorganic Ion Exchanger: styrene supported zirconium (IV) tungstophosphate for a pesticide phosphamidon at 30, 45 and 60°C. As a result some thermodynamic parameters like Freundlich constants, thermodynamic equilibrium constant (K0), standard free energy changes (ΔG0), standard enthalpy change (ΔH0) and standard entropy changes (ΔS0) have been evaluated.
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synthesis and Ion exchange behaviour of polyaniline sn iv arsenophosphate a polymeric Inorganic Ion Exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1999Co-Authors: Ram Niwas, Asif Ali Khan, K. G. VarshneyAbstract: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, reproducibility and selectivity for heavy metals. Such a type of Ion Exchanger ‘polyaniline Sn(IV) arsenophosphate’ has been synthesized by mixing polyaniline into Inorganic material. This material is characterized using X-ray, IR, TGA studies in additIon to Ion exchange capacity, pH-titratIon, elutIon and distributIon behaviour. On the basis of distributIon studies, the material has been found to be highly selective for Pb(II). Kinetic study of exchange for the metal Ions has been performed and some physical parameters such as self diffusIon coefficient D0, energy Ea and entropy ΔS* of activatIon have been determined.
Weqar Ahmad Siddiqui - One of the best experts on this subject based on the ideXlab platform.
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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, 2007Co-Authors: Weqar Ahmad Siddiqui, Shakeel Ahmad KhanAbstract: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).
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synthesis characterizatIon and Ion exchange properties of a new and novel organic Inorganic hybrid catIon Exchanger nylon 6 6 zr iv phosphate
Talanta, 2007Co-Authors: Shakeel Ahmad Khan, Weqar Ahmad Siddiqui, Asif Ali KhanAbstract: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.