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Çanakkale, Turkey

Sahiner N.,Nanoscience and Technology Research and Application Center | Yasar A.O.,Terzioglu Campus | Aktas N.,Yuzuncu Yil University
Journal of Industrial and Engineering Chemistry | Year: 2014

Poly(4-vinyl pyridine)-silica (p(4-VP)-silica) composites were synthesized via micro emulsion polymerization, and the capsule of p(4-vinyl pyridine), as cap-p(4-VP), was prepared by removing the core silica from p(4-VP)-silica composites by HF treatment. Dicationic particles in the form of cap-poly(4-vinyl pyridine)++-1,4-butane (cap-p(4-VP)++-C4), capsule-poly(4-vinyl pyridine)++-1,6-hexane (cap-p(4-VP)++-C6), and capsule-poly(4-vinyl pyridine)++-1,8-octane (cap-p(4-VP)++-C8) were prepared by modifying cap-p(4-VP) particles with corresponding dibromo alkanes. Then, polymer-metal composites were also prepared from cap-p(4-VP) and dicationic cap-p(4-VP) particles by loading CoCl2 from ethanol and the obtained composites were used in H2 generation from hydrolysis of NaBH4, and The Ea for the composite catalyst was calculated as 56.53 kJ/mol. © 2014 The Korean Society of Industrial and Engineering Chemistry. Source


Sahiner N.,Nanoscience and Technology Research and Application Center | Yasar A.O.,Terzioglu Campus | Aktas N.,Yuzuncu Yil University
Journal of Industrial and Engineering Chemistry | Year: 2015

Poly(4-vinyl pyridine)-silica (p(4-VP)-silica) composites were synthesized via micro emulsion polymerization, and the capsule of p(4-vinyl pyridine), as cap-p(4-VP), was prepared by removing the core silica from p(4-VP)-silica composites by HF treatment. Dicationic particles in the form of cap-poly(4-vinyl pyridine)++-1,4-butane (cap-p(4-VP)++-C4), capsule-poly(4-vinyl pyridine)++-1,6-hexane (cap-p(4-VP)++-C6), and capsule-poly(4-vinyl pyridine)++-1,8-octane (cap-p(4-VP)++-C8) were prepared by modifying cap-p(4-VP) particles with corresponding dibromo alkanes. Then, polymer-metal composites were also prepared from cap-p(4-VP) and dicationic cap-p(4-VP) particles by loading CoCl2 from ethanol and the obtained composites were used in H2 generation from hydrolysis of NaBH4, and The Ea for the composite catalyst was calculated as 56.53kJ/mol. © 2014 The Korean Society of Industrial and Engineering Chemistry. Source


Sel K.,Canakkale Onsekiz Mart University | Demirci S.,Terzioglu Campus | Ozturk O.F.,Terzioglu Campus | Aktas N.,Yuzuncu Yil University | Sahiner N.,Canakkale Onsekiz Mart University
Microelectronic Engineering | Year: 2015

Various MOFs as TMA-M derived from Ba(II), Cd(II), Pb(II), and Zn(II) as metal ions (M) and trimesic acid (TMA, benzene-1,3,5-tricarboxylic acid) as organic linker were prepared for the determination of their susceptibility against ammonia (NH3). FT-IR spectroscopy, thermogravimetric analysis, SEM images, BET surface area and porosity measurements were done. Furthermore, the room temperature conductivity of the synthesized TMA-M MOFs were investigated against room temperature NH3 vapor. The room temperature conductivities were determined 8.3E10-11, 7.6E10-11 and 1.7E10-10 S cm-1 for TMA-Zn, TMA-Cd and TMA-Pb, respectively. Among the TMA-M MOFs, it was observed that TMA-Zn MOF showed relatively higher response to NH3 vapor, where it's conductivity was increased about 50 times in comparison to the conductivity measurement of TMA-Zn MOF in the absence of NH3. Furthermore, a more detailed conductivity analysis of this response was investigated for TMA-Zn MOF as a function of various NH3 exposure times at room temperature. © 2015 Elsevier B.V. All rights reserved. Source


Karakoyun N.,Yuzuncu Yil University | Kubilay S.,Yuzuncu Yil University | Aktas N.,Yuzuncu Yil University | Turhan O.,Marmore Ltd | And 4 more authors.
Desalination | Year: 2011

In this study, p(acrylamide)-chicken biochar (p(AAm)-CB), p(acrylamide)-wood biochar (p(AAm)-WB), and p(acrylamide)-tire biochar (p(AAm)-TB) hydrogel composites were prepared using acrylamide (AAm) as monomer with the corresponding biochars, with N,N'-methylenebisacrylamide (MBA) as crosslinker and ammonium persulfate (APS) as initiator. P(AAm)-CB, p(AAm)-WB, and p(AAm)-TB were used as adsorbents to remove phenol from aqueous environments. The synthesized p(AAm)-CB, p(AAm)-WB, p(AAm)-TB and p(AAm) hydrogel composites had swelling values of 1112, 1045, 847, and 623%, respectively in distilled water. The prepared hydrogel biochar material compositions were examined using an elemental analyzer. Absorption of phenol into p(AAm)-WB was studied at different pHs to determine the optimum pH for maximum removal of phenol. The ionic strength of the medium was varied between 0.01 and 1molL-1 to determine the effect of salt (NaCl) on the absorption characteristics and it was found that the absorption of phenol increased with a decrease in the amount of salt. Langmuir and Freundlich isotherms were applied to describe the absorption characteristics and the Langmuir isotherm describes the absorption phenomena in this study much better than the Freundlich isotherm. Pseudo-first-order and pseudo-second-order kinetic studies were also applied to determine absorption characteristic. © 2011 Elsevier B.V. Source

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