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Mercouri G Kanatzidis - One of the best experts on this subject based on the ideXlab platform.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Jie Pan, Zhongnan Guo, Fuqiang Huang, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed layered sulfide Kx[Bi4-xMnxS6] (x = 1.28) deriving from the Bi2Se3-structure type by targeted substitutIon to generate quintuple [Bi4-xMnxS6]x- layers and K+ catIons between them. The Material has dual functIonality: it is an attractive semiconductor with a bandgap of 1.40 eV and also an environmental remediatIon Ion-Exchange Material. The compound is paramagnetic, and optical adsorptIon spectroscopy and DFT electronic structure calculatIons reveal that it possesses a direct band gap and a work functIon of 5.26 eV. The K+ Ions Exchange readily with alkali or alkaline-earth Ions (Rb+, Cs+, and Sr2+) or soft Ions (Pb2+, Cd2+, Cr3+, and Zn2+). Furthermore, when the K+ Ions are depleted the Mn2+ Ions in the Bi2Se3-type slabs can also be replaced by soft Ions, achieving large adsorptIon capacities. The Ion Exchange reactIons of Kx[Bi4-xMnxS6] can be used to create new Materials of the type Mx[Bi4-xMnxS6] in a low temperature kinetically controlled manner with significantly different electronic structures. The Kx[Bi4-xMnxS6] (x = 1.28) exhibits efficient capture of Cd2+ and Pb2+ Ions with high distributIon coefficient, Kd (107 mL/g), and Exchange capacities of 221.2 and 342.4 mg/g, respectively. The Material exhibits excellent capacities even in high concentratIon of competitive Ions and over a broad pH range (2.5-11.0). The results highlight the promise of the Kx[Bi4-xMnxS6] (x = 1.28) phase to serve not only as a highly selective adsorbent for industrial and nuclear wastewater but also as a magnetic 2D semiconductor for optoelectronic applicatIons.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Fuqiang Huang, Kejun Bu, Yuhao Gu, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed...
Fuqiang Huang - One of the best experts on this subject based on the ideXlab platform.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Jie Pan, Zhongnan Guo, Fuqiang Huang, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed layered sulfide Kx[Bi4-xMnxS6] (x = 1.28) deriving from the Bi2Se3-structure type by targeted substitutIon to generate quintuple [Bi4-xMnxS6]x- layers and K+ catIons between them. The Material has dual functIonality: it is an attractive semiconductor with a bandgap of 1.40 eV and also an environmental remediatIon Ion-Exchange Material. The compound is paramagnetic, and optical adsorptIon spectroscopy and DFT electronic structure calculatIons reveal that it possesses a direct band gap and a work functIon of 5.26 eV. The K+ Ions Exchange readily with alkali or alkaline-earth Ions (Rb+, Cs+, and Sr2+) or soft Ions (Pb2+, Cd2+, Cr3+, and Zn2+). Furthermore, when the K+ Ions are depleted the Mn2+ Ions in the Bi2Se3-type slabs can also be replaced by soft Ions, achieving large adsorptIon capacities. The Ion Exchange reactIons of Kx[Bi4-xMnxS6] can be used to create new Materials of the type Mx[Bi4-xMnxS6] in a low temperature kinetically controlled manner with significantly different electronic structures. The Kx[Bi4-xMnxS6] (x = 1.28) exhibits efficient capture of Cd2+ and Pb2+ Ions with high distributIon coefficient, Kd (107 mL/g), and Exchange capacities of 221.2 and 342.4 mg/g, respectively. The Material exhibits excellent capacities even in high concentratIon of competitive Ions and over a broad pH range (2.5-11.0). The results highlight the promise of the Kx[Bi4-xMnxS6] (x = 1.28) phase to serve not only as a highly selective adsorbent for industrial and nuclear wastewater but also as a magnetic 2D semiconductor for optoelectronic applicatIons.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Fuqiang Huang, Kejun Bu, Yuhao Gu, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed...
Ruiqi Wang - One of the best experts on this subject based on the ideXlab platform.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Jie Pan, Zhongnan Guo, Fuqiang Huang, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed layered sulfide Kx[Bi4-xMnxS6] (x = 1.28) deriving from the Bi2Se3-structure type by targeted substitutIon to generate quintuple [Bi4-xMnxS6]x- layers and K+ catIons between them. The Material has dual functIonality: it is an attractive semiconductor with a bandgap of 1.40 eV and also an environmental remediatIon Ion-Exchange Material. The compound is paramagnetic, and optical adsorptIon spectroscopy and DFT electronic structure calculatIons reveal that it possesses a direct band gap and a work functIon of 5.26 eV. The K+ Ions Exchange readily with alkali or alkaline-earth Ions (Rb+, Cs+, and Sr2+) or soft Ions (Pb2+, Cd2+, Cr3+, and Zn2+). Furthermore, when the K+ Ions are depleted the Mn2+ Ions in the Bi2Se3-type slabs can also be replaced by soft Ions, achieving large adsorptIon capacities. The Ion Exchange reactIons of Kx[Bi4-xMnxS6] can be used to create new Materials of the type Mx[Bi4-xMnxS6] in a low temperature kinetically controlled manner with significantly different electronic structures. The Kx[Bi4-xMnxS6] (x = 1.28) exhibits efficient capture of Cd2+ and Pb2+ Ions with high distributIon coefficient, Kd (107 mL/g), and Exchange capacities of 221.2 and 342.4 mg/g, respectively. The Material exhibits excellent capacities even in high concentratIon of competitive Ions and over a broad pH range (2.5-11.0). The results highlight the promise of the Kx[Bi4-xMnxS6] (x = 1.28) phase to serve not only as a highly selective adsorbent for industrial and nuclear wastewater but also as a magnetic 2D semiconductor for optoelectronic applicatIons.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Fuqiang Huang, Kejun Bu, Yuhao Gu, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed...
Syed Ashfaq Nabi - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterizatIon of nano composite Ion Exchanger its adsorptIon behavior
Colloids and Surfaces B: Biointerfaces, 2011Co-Authors: Syed Ashfaq Nabi, Rani Bushra, Mohammad Shahadat, A H Shalla, Ameer AzamAbstract:Abstract A novel organic–inorganic nanocomposite catIon-Exchanger has been synthesized via sol–gel method. It was characterized on the basis of FTIR, XRD, SEM, TEM, AFM and Raman studies. The structural studies reveal semi-crystalline nature of the Material with the particle size ranging from 1–5 nm. Physiochemical properties such as Ion-Exchange capacity, chemical and thermal stability of composite Material have also been determined. BifunctIonal behavior of the Material has been indicated by its pH titratIons curves. The nanocomposite Material exhibits improved thermal stability, higher Ion-Exchange capacity and better selectivity for toxic heavy metals. The Ion-Exchange Material shows an Ion-Exchange capacity of 1.8 meq g −1 for Na + Ions. SorptIon behavior of metal Ions on the Material was studied in different solvents. The catIon Exchanger was found to be selective for Pb(II), Hg(II) and Zr(IV) Ions. The limit of detectIon (LOD) and the limit of quantificatIon (LOQ) for Pb(II) Ion was found to be 0.85 and 2.85 μg L −1 . Analytically important separatIons of heavy metal Ions in synthetic mixtures as well as industrial effluents and natural water were achieved with the Exchanger. The practical utility of polyanilineZr(IV)sulphosalicylate catIon Exchanger has been established for the analysis and recovery of heavy metal Ions in environmental samples.
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synthesis characterizatIon and analytical applicatIons of a new composite catIon Exchange Material acetonitrile stannic iv selenite adsorptIon behavior of toxic metal Ions in nonIonic surfactant medium
Separation Science and Technology, 2011Co-Authors: Syed Ashfaq Nabi, Rani Bushra, Z A Alothman, Mu NaushadAbstract:A composite catIon Exchange Material acetonitrile stannic(IV) selenite was prepared under different experimental conditIons. The Ion Exchange capacity of the Material was improved from 0.75 to 1.83 meq g−1 in comparison to its inorganic counterpart, stannic selenite. The Material was characterized on the basis of X-ray, TGA, FTIR, and SEM studies. Ion-Exchange capacity, pH titratIon, elutIon behavior, and distributIon studies were also carried out to determine the preliminary Ion-Exchange properties of the Material. Furthermore, it was investigated that this Ion Exchange Material has a good reusability after 8 times regeneratIon. The sorptIon behavior of metal Ions was studied in nonIonic surfactants namely triton x-100 and tween. On the basis of distributIon coefficient studies, several binary separatIons of metal Ions viz- Pb2+-Th4+, Ni2+-Th4+, Ni2+-Zn2+, Cu2+-Ce4+, Al3+-Bi3+, and Al3+Zn2+ was achieved on the packed column of this Ion Exchange Material. The practical applicability of this catIon-exchang...
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synthesis and characterizatIon of a thermally stable strongly acidic cd ii Ion selective composite catIon Exchanger polyaniline ce iv molybdate
Desalination, 2010Co-Authors: Zafar Alam, Syed Ashfaq NabiAbstract:Abstract A polymer supported organic–inorganic composite and strongly acidic catIon-Exchanger polyaniline Ce(IV) molybdate was chemically synthesized and demonstrated to be an excellent Ion-Exchange Material due to its high selectivity for Cd(II), thermal stability and fast elutIon of an Exchangeable H+ Ion. The Material was characterized for its Ion Exchange properties to study its catIon-Exchange behavior. Cd(II) selectivity depends upon the distributIon coefficient in several solvent systems. The selectivity of this Material varied depending upon its compositIon and the compositIon of the eluting solvent. Its selectivity was examined and some important binary separatIons such as Cd(II)–Pb(II), Cd(II)–Hg(II), Cd(II)–Zn(II) and Cd(II)–Ni(II) were also achieved. The physico-chemical properties of the Material were also studied using C, H, N elemental analysis, ICP-MS, FTIR, TGA–DTA, X-ray and SEM studies.
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studies of catIon Exchange thermodynamics for alkaline earths and transitIon metal Ions on a new crystalline catIon Exchanger aluminium tungstate effect of the surfactant s concentratIon on distributIon coefficients of metal Ions
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Syed Ashfaq Nabi, Mu NaushadAbstract:Abstract A new crystalline catIon-Exchanger aluminium tungstate was synthesized by mixing solutIons of 0.1 M aluminium nitrate and 0.1 M sodium tungstate at pH 1.2. The Ion-Exchange capacity of the Material was found 1.17 meq g −1 (for Na + ). The K d values for some alkaline and transitIon metal Ions were performed in 0.1 M HNO 3 and TritonX-100 (non Ionic surfactant) solvent systems by batch process. Some important and analytically difficult quantitative and selective separatIons were achieved by using the packed column of this catIon-Exchange Material column. Ion-Exchange equilibria of alkaline and transitIon metal Ions and thermodynamic parameters viz. equilibrium constant ( K a ), values of standard Gibbs free energy change (Δ G °), standard enthalpy change (Δ H °), and standard entropy change (Δ S °) were determined on this Ion-Exchange Material. The effect of temperature on Ion-Exchange isotherm of alkaline earth metal Ions (Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ )/H + systems and transitIon metal Ions (Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ )/H + systems were studied at different temperatures 30, 40, 50, and 60 °C. The selectivity coefficients at constant Ionic strength (0.03 mol/kg) for alkaline and transitIon metal Ions were also evaluated.
Yi Xiao - One of the best experts on this subject based on the ideXlab platform.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Jie Pan, Zhongnan Guo, Fuqiang Huang, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed layered sulfide Kx[Bi4-xMnxS6] (x = 1.28) deriving from the Bi2Se3-structure type by targeted substitutIon to generate quintuple [Bi4-xMnxS6]x- layers and K+ catIons between them. The Material has dual functIonality: it is an attractive semiconductor with a bandgap of 1.40 eV and also an environmental remediatIon Ion-Exchange Material. The compound is paramagnetic, and optical adsorptIon spectroscopy and DFT electronic structure calculatIons reveal that it possesses a direct band gap and a work functIon of 5.26 eV. The K+ Ions Exchange readily with alkali or alkaline-earth Ions (Rb+, Cs+, and Sr2+) or soft Ions (Pb2+, Cd2+, Cr3+, and Zn2+). Furthermore, when the K+ Ions are depleted the Mn2+ Ions in the Bi2Se3-type slabs can also be replaced by soft Ions, achieving large adsorptIon capacities. The Ion Exchange reactIons of Kx[Bi4-xMnxS6] can be used to create new Materials of the type Mx[Bi4-xMnxS6] in a low temperature kinetically controlled manner with significantly different electronic structures. The Kx[Bi4-xMnxS6] (x = 1.28) exhibits efficient capture of Cd2+ and Pb2+ Ions with high distributIon coefficient, Kd (107 mL/g), and Exchange capacities of 221.2 and 342.4 mg/g, respectively. The Material exhibits excellent capacities even in high concentratIon of competitive Ions and over a broad pH range (2.5-11.0). The results highlight the promise of the Kx[Bi4-xMnxS6] (x = 1.28) phase to serve not only as a highly selective adsorbent for industrial and nuclear wastewater but also as a magnetic 2D semiconductor for optoelectronic applicatIons.
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kx bi4 xmnxs6 design of a highly selective Ion Exchange Material and direct gap 2d semiconductor
Journal of the American Chemical Society, 2019Co-Authors: Ruiqi Wang, Haijie Chen, Yi Xiao, Ido Hadar, Xian Zhang, Fuqiang Huang, Kejun Bu, Yuhao Gu, Mercouri G KanatzidisAbstract:Layered sulfides with high selectivity for binding heavy metal Ions and radIonuclide Ions are promising Materials in effluent treatment and water purificatIon. Here we present a ratIonally designed...
