Yazar "Özçifçi, Zehra" 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 ... -
Catalytic activity of palladium doped activated carbon from waste coffee on some environmental pollutants
Karaoğlu, Kaan; Özçifçi, Zehra; Çalışkan, Melike; Baran, Talat; Akçay, Hakkı Türker (Elsevier, 2022)The presence of nitro compounds and such commercial dyes as Congo red, methylene blue, methyl orange and methyl red in water/wastewater causes environmental issues. The treatment of such industrial contaminants, new efficient ... -
Mesoporous chromium oxide doped palladium catalysis for cyanation reaction of some aryl halides
Karaoğlu, Kaan; Akçay, Hakkı Türker; Özçifçi, Zehra; Çalışkan, Melike; Baran, Talat (Elsevier, 2021)A Pd/Cr2O3 hybrid catalyst for cyanation reaction of some aryl halides was synthesized and characterized by XRD, SEM/EDS and TEM. The porous structure of the catalyst was also investigated by BET analysis. All XRD ... -
Microplastic contamination and risk assessment in table salts: Turkey
Özçifçi, Zehra; Başaran, Burhan; Akçay, Hakkı Türker (Elsevier, 2023)In this study, the characterization of microplastics of table salts (n = 36) was determined by FT -IR. Then, individuals' exposure to microplastics from table salt consumption was calculated with a deterministic model, and ... -
Microplastic contamination in some beverages marketed in türkiye: Characteristics, dietary exposure and risk assessment
Başaran, Burhan; Aytan, Ülgen; Şentürk, Yasemen; Özçifçi, Zehra; Akçay, Hakkı Türker (Elsevier, 2024)In this study, microplastic contamination in water, natural mineral water and mineral water, sparkling soft drinks, cold tea and some traditional beverages marketed in Türkiye were assessed. Microplastics physically and ... -
Microplastics in branded milk: Dietary exposure and risk assessment
Başaran, Burhan; Özçifçi, Zehra; Akçay, Hakkı Türker; Aytan, Ülgen (Elsevier, 2023)In this study, 14 packaged milk of various brands sold in the Türkiye market was examined. The microplastics were physically characterised under the microscope. Their vibrational spectra were recorded with the ATF/FT-IR ... -
Microplastics in honey from Türkiye: Occurrence, characteristic, human exposure, and risk assessment
Başaran, Burhan; Özçifçi, Zehra; Kanbur, Esra Demir; Akçay, Hakkı Türker; Gül, Serkan; Bektaş, Yusuf; Aytan, Ülgen (Elsevier, 2024)In this study, honey samples produced in Türkiye in 2023 were analyzed to assess occurrence of microplastics. The microplastics were physically and chemically characterised by stereomicroscope and FT-IR, respectively. ... -
A new activated carbon-supported Pd-ZnO catalyst for Heck Cross-coupling reactions
Karaoğlu, Kaan; Özçifçi, Zehra; Çalışkan, Melike; Akçay, Hakkı Türker; Baran, Talat (Elsevier, 2023)In this work, to develop catalysts for Heck-type coupling reactions, a hybrid ZnO-Pd nanocatalyst was fabricated on activated carbon sourced from polymer debris. Such techniques as transmission electron microscopy (TEM), ... -
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 ... -
Novel peripheral and non-peripheral oxobenzo[d]thiazol substituted cobalt phthalocyanines: Synthesis, electrochemistry, spectroelectrochemistry, electrocatalytic hydrogen production in alkaline medium
Akyüz, Duygu; Özçifçi, Zehra; Menteşe, Emre; Akçay, Hakkı Türker (Elsevier, 2022)In this study novel oxobenzo[d]thiazol substituted cobalt phthalocyanine complexes were synthesized and characterized by FT-IR, NMR, UV-vis spectroscopy, and mass spectrometry. The redox properties of peripheral and ... -
Novel phthalocyanines bearing 1,2,4 triazole substituents: Synthesis, characterization, photophysical and photochemical properties
Demirbaş, Ümit; Özçifçi, Zehra; Akçay, Hakkı Türker; Menteşe, Emre (Pergamon-Elsevier Science Ltd, 2020)4-(4,5-Diphenyl-4H-1,2,4-triazol-3-ylthio)phthalonitrile ( 3) and its non-peripherally tetra substituted zinc(II) phthalocyanine (4) and magnesium(II) phthalocyanine (5) derivatives were prepared. the novel compounds 3-5 ... -
Novel phthalocyanines bearing fluoro-methylquinolin substituents: Synthesis, characterization, photophysical and photochemical properties
Demirbaş, Ümit; Özçifçi, Zehra; Akçay, Hakkı Türker (Elsevier, 2024)The novel 4-((6-fluoro-2-methylquinolin-4-yl)oxy)phthalonitrile (3a), 3-((6-fluoro-2-methylquinolin-4-yl)oxy)phthalonitrile (3b), tetra 6-fluoro-2-methylquinolin-4-yl)oxy substituted zinc(II) phthalocyanines (4a and 4b) ... -
Occurrence of microplastics in herpetological museum collection: Grass snake (Natrix natrix [Linnaeus, 1758]) and dice anake (Natrix tessellata [Laurenti, 1769]) as model organisms
Gül, Serkan; Karaoğlu, Kaan; Özçifçi, Zehra; Candan, Kamil; Ilgaz, Çetin; Kumlutaş, Yusuf (Springer, 2022)Microplastics are plastic fragments with a size less than 5 mm in length. In addition to a threat to the marine environments where these are abundantly present, these have also started polluting freshwater ecosystems. ... -
Production and characterization of activated carbon foams with various activation agents for electrochemical double layer capacitors (EDLCs) applications
Özçifçi, Zehra; Emirik, Mustafa; Akçay, Hakkı Türker; Yumak, Tuğrul (Elsevier, 2024)Sucrose-based activated carbons were obtained by carbon foams with sugar and cobalt (II) nitrate as precursors, followed by using different chemical activation agents. The effect of Co(NO3)2 concentration, the carbonization ... -
Sucrose-based activated carbon foams as an electrode active material for supercapacitors
Özçifçi, Zehra; Özşanlı, Mehmet Ali; Akçay, Hakkı Türker; Yumuk, Tuğrul (Springer, 2022)Activated carbon foams (ACFs) have been successfully prepared by foaming sucrose with Zn nitrate and further chemical activation with H3PO4. The effect of the foaming agent (Zn) concentration and the activation temperature ... -
Treatment of wastewater containing organic pollutants in the presence of N-doped graphitic carbon and Co3O4/peroxymonosulfate
Akçay, Hakkı Türker; Demir, Adem; Özçifçi, Zehra; Yumak, Tuğrul; Keleş, Turgut (Springer, 2023)The disposal of organic pollutants is one of the important research topics. Some of the studies in this field are based on the degradation of organic pollutants with a catalytic agent. The cobalt tetraoxide/peroxymonosulfate ...
