Yazar "Tabak, Ahmet" için listeleme
-
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 ... -
Adsorption of Reactive Red 120 from aqueous solutions by cetylpyridinium-bentonite
Tabak, Ahmet; Baltaş, Nimet; Afşin, Beytullah; Emirik, Mustafa; Çağlar, Bülent; Eren, Erdal (Wiley, 2010)BACKGROUND: The removal of Reactive Red 120 (RR 120) from aqueous solutions using cetylpyridinium modified Resadiye bentonite (CP-bentonite) prepared by ion exchange was investigated with particular reference to the effects ... -
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 and pillaring of a Turkish bentonite (Resadiye)
Tabak, Ahmet; Afsin, B.; Çağlar, B.; Köksal, E. (Elsevier, 2007)The shifts of the Si{single bond}O{single bond}Si stretching and the Si{single bond}O{single bond}Al and Si{single bond}O{single bond}Si bending modes, as well as the free silica peak in the IR spectra and the strengthening ... -
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 ... -
Determination of adsorptive properties of a Turkish Sepiolite for removal of Reactive Blue 15 anionic dye from aqueous solutions
Tabak, Ahmet; Eren, E.; Afsin, B.; Caglar, B. (Elsevier, 2009)Reactive Blue 15 (RB 15) adsorption on the Turkish Sepiolite was carried out by batch equilibrium technique. IR spectrum and surface area measurement of the composite of dye-sepiolite (Turkish) pointed out that dye species ... -
Equilibrium and kinetic studies on the removal of basic dye using raw and thermal-activated fatsa bentonite
Eren, Erdal; Çağlar, Bülent; Eren, Bilge; Tabak, Ahmet (2010)The adsorption behavior of crystal violet (CV+) from aqueous solution onto raw Fatsa (RFB) and thermalactivated Fatsa (TAFB) bentonite samples was investigated as a function of parameters, such as pH, temperature, initial ... -
The molecular aggregation of pyronin y in natural bentonite clay suspension
Meral, Kadem; Yılmaz, Nuray; Kaya, Mehmet; Tabak, Ahmet; Onganer, Yavuz (Elsevier, 2011)The molecular aggregation and spectroscopic properties of Pyronin Y (PyY) in the suspension containing natural bentonite clay were studied using molecular absorption, steady-state and time-resolved fluorescence spectroscopy ... -
Newly synthesized bentonite-histidine (Bent-His) micro-composite affinity sorbents for IgG adsorption
Öztürk, Nevra; Tabak, Ahmet; Akgöl, Sinan; Denizli, Adil (Elsevier, 2007)Bentonite has several advantages for use as a support, including its lack of toxicity, chemical reactivity and hydrophilicity allowing easy fixation of biomolecules. A new approach was developed to obtain an efficient and ... -
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 ... -
Performance of magnesium oxide-coated bentonite in removal process of copper ions from aqueous solution
Eren, E.; Tabak, Ahmet; Eren, B. (Elsevier, 2010)This paper presents the adsorption of Cu(II) ions from aqueous solution on modified Unye bentonite. Adsorption of Cu(II) ions by magnesium oxide-coated bentonite (MCB) sample was investigated as a function of the initial ... -
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 ...
