Browsing by Author "Tabak, Ahmet"
Now showing items 1-18 of 18
-
Activated carbon derived from tea waste: A promising supporting material for metal nanoparticles used as catalysts in hydrolysis of ammonia borane
Akbayrak, Serdar; Özçifçi, Zehra; Tabak, Ahmet (Pergamon-Elsevier Science Ltd, 2020)Activated carbons with high porosity and high surface area are promising materials to be used in wide-range applications. They can easily be prepared from various biomass source following by simple and reproducible activation ... -
Adsorption of ammonium (NH4+) from aqueous solution by Unye bentonite
Serezli, Ramazan; Tabak, Ahmet (Foundation Environmental Protection & Research-Fepr, 2013)In this study, ammonium (NH4+) removal from aqueous media was investigated by using bentonit clay. Different concentrations of ammonium ion adsorption from aqueous solutions were examined at a room temperature. Adsorption ... -
Adsorption of lysozyme from aqueous solutions by a novel bentonite-tyrptophane (Bent-Trp) microcomposite affinity sorbent
Kalburcu, Tülden; Tabak, Ahmet; Öztürk, Nevra; Tüzmen, Nalan; Akgöl, Sinan; Çağlar, Bülent; Denizli, Adil (Elsevier, 2015)This study deals with developing bentonite-tryptophan (Bent-Trp) microcomposite affinity sorbent (38-105 gm) for lysozyme adsorption from aqueous solutions. the structural analysis results of Bent-Trp microcomposites ... -
Artifacts in cranial MRI caused by extracranial foreign bodies and analysis of these foreign bodies
Kayacı, Selim; Tabak, Ahmet; Durur-Subaşı, Irmak; Eldeş, Tuğba; Köksal, Vaner; Şirin, Murat; Arslan, Yusuf Kemal (Wolters Kluwer Medknow Publications, 2019)Purpose: the purpose of our study was to conduct a chemical analysis of extracranial foreign bodies (FBs) causing artifacts in cranial magnetic resonance imaging (MRI) and to investigate the association between chemical ... -
Characterization of AlFe-pillared Unye bentonite: A study of the surface acidity and catalytic property
Çağlar, Bülent; Çubuk, Osman; Demir, Ersin; Çoldur, Fatih; Çatır, Mustafa; Topcu, Cihan; Tabak, Ahmet (Elsevier Science Bv, 2015)Aluminium-iron-pillared bentonite has been prepared by incorporation of the iron mixed aluminium-polyoxocation into bentonite layers and characterized by the powder X-ray diffraction, Fourier transform infrared, thermal ... -
Characterization of unye bentonite after treatment with sulfuric acid
Çağlar, Bülent; Afşin, Beytullah; Köksal, Engin; Tabak, Ahmet; Eren, Erdal (SOC Brasileira Quimica, 2013)Unye bentonite was found to consist predominantly of a dioctahedral smectite along with quartz, tridymite, cristobalite, and minor fractions of feldspar and anatase. A considerable amount of Al was retained as a constituent ... -
Covalent grafting of pyridine-2-methanol into kaolinite layers
Çağlar, Bülent; Çırak, Çağrı; Tabak, Ahmet; Afşin, Beytullah; Eren, Erdal (Elsevier, 2013)A novel hybrid organic-clay material was prepared by grafting of pyridine-2-methanol in the interlayer space of kaolinite by using a kaolinite/methanol compound as an intermediate. A kaolinite/methanol compound was obtained ... -
Çeşitli Katyon Değiştirilmiş ve Sütunlanmış Artvin Bentonitlerinin Karakterizasyonu ve Seçilmiş Bir Organik Reaksiyonda Katalizör Olarak Kullanılmaları
Tabak, Ahmet; Çağlar, Bülent; Kaya, Mehmet (Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020)In this study, the catalytic activities of raw, some metal cations exchanged (Fe3+ and Cu2+) and Fe- and Alpillared Artvin bentonite samples as a catalyst for acetalization reaction of benzaldehyde with 2, 3-butanediol ... -
Noble metal nanoparticles supported on activated carbon: Highly recyclable catalysts in hydrogen generation from the hydrolysis of ammonia borane
Akbayrak, Serdar; Özçifçi, Zehra; Tabak, Ahmet (Academic Press Inc Elsevier Science, 2019)Noble metal nanoparticles including rhodium, ruthenium and palladium have been extensively used in catalysis field. Since their limited abundance and high cost, many methods have been developed to obtain highly active and ... -
Preparation and characterization of "green" hybrid clay-dye nanopigments
Kaya, Mehmet; Onganer, Yavuz; Tabak, Ahmet (Pergamon-Elsevier Science Ltd, 2015)We obtained a low cost and abundant nanopigment material composed of Rhodamine B (Rh-B) organic dye compound and Unye bentonite (UB) clay from Turkey. the characterization of the nanopigment was investigated using scanning ... -
Preparation and characterization of a novel activated carbon component via chemical activation of tea woody stem
Tabak, Ahmet; Sevimli, Kadir; Kaya, Mehmet; Çağlar, Bülent (Springer, 2019)The novel activated carbon materials were synthesized by the carbonization and chemical activation of agricultural bio-waste from tea woody stems (TWS), and these materials were characterized by using FTIR, SEM, TG/DTA and ... -
Preparation of bentonite-cysteine (Bent-Cys) Micro-composite affinity sorbents for ferritin adsorption
his study focused on developing bentonite-cysteine micro-composite «affinity sorbents (Bent-Cys) (38-105 |am) for Ferritin adsorption from aqueous solutions. The pseudo-specific affinity ligand L-cysteine was immobilized ... -
Pyronin Y (basic xanthene dye)-bentonite composite: a spectroscopic study
Tabak, Ahmet; Kaya, Mehmet; Yılmaz, Nurdane; Meral, Kadem; Önganer, Yavuz; Çağlar, Bülent; Sungur, O. (Elsevier Science Bv, 2014)The expansion by 1.43 Angstrom of basal spacing and the shift to higher frequencies of in-plane ring vibrations of the Pyronin Y molecule at 1603 and 1527 cm(-1) on the formation of Pyronin Y-bentonite composite exhibited ... -
Recycling of an agricultural bio-waste as a novel cellulose aerogel: A green chemistry study
Kaya, Mehmet; Tabak, Ahmet (Springer, 2020)Cellulose aerogel (CA) isolated from tea stem wastes (TSW) is a good fire retardant and heat insulator, environmentally friendly, thermally stable and highly porous material with a network structure. These outstanding ... -
Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications
Çubuk, Osman; Çağlar, Bülent; Topçu, Cihan; Çoldur, Fatih; Sarp, Gökhan; Tabak, Ahmet; Şahin, Erdal (Elsevier, 2015)Organosmectites were prepared by the intercalation of hexadecyltrimethylammonium cations at various ratios into interlayer of Unye smectite. Structural, thermal, morphological and textural properties of the synthesized ... -
Structural, thermal, morphological and surface charge properties of dodecyltrimethylammonium-smectite composites
Çağlar, Bülent; Topçu, Cihan; Çoldur, Fatih; Sarp, Gökhan; Çağlar, Sema; Tabak, Ahmet; Şahin, Erdal (Elsevier, 2016)The present investigation was undertaken to obtain information about the structural, thermal, morphological, surface charge and textural properties of the synthesized dodecyltrimethylammonium-smectite composites at various ... -
Ünye bentoniti ile sulu ortamdan amonyum ($NH_{4}^+$) adsorbsiyonu
Sezerlı, Ramazan; Tabak, Ahmet (2013)Bu çalışmada sucul canlılar için problem olan amonyumun ($NH_{4}^+$) sulu ortamdan bentonit ile uzaklaştırılması araştırıldı. Oda sıcaklığında yürütülen bu çalışmada, sulu çözeltiden farklı konsantrasyonlarda amonyum ... -
A zinc(II) metal organic framework based on flexible o-phenylenediacetate and rigid 4,4 '-azobis(pyridine) ligands: Synthesis, crystal structure and hydrogen gas adsorption property
Günay, Güneş; Yeşilel, Okan Zafer; Erer, Hakan; Keskin, Seda; Tabak, Ahmet (Pergamon-Elsevier Science Ltd, 2015)A new three-dimensional (3D) metal organic framework, [Zn-2(mu(4)-o-pda)(2)(mu-abpy)](n) (1), has been synthesized by the hydrothermal reaction and characterized by FT-IR spectroscopy, elemental analysis, thermal analysis, ...
