Kaya, Murat

Profile URL
https://hdl.handle.net/20.500.14411/6687
Name Variants
Kaya,Murat & Murat, Kaya & M., Kaya & Kaya M. & Kaya, Murat & K.,Murat & K., Murat & M.,Kaya & Kaya,M. & Murat Kaya
Job Title
Profesör Doktor
Email Address
muratkaya@atilim.edu.tr
Main Affiliation
Chemical Engineering
Status
Website
ORCID ID
0000-0002-2458-8924
Scopus Author ID
57206407342
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
No research topics data found.

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
Research Products
GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
3
Research Products
QUALITY EDUCATION4
QUALITY EDUCATION
0
Research Products
GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
9
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
25
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
4
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
Research Products
SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
1
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
CLIMATE ACTION13
CLIMATE ACTION
0
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
4
Research Products
LIFE ON LAND15
LIFE ON LAND
0
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
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Scholarly Output

59

Articles

38

Views / Downloads

118/236

Supervised MSc Theses

17

Supervised PhD Theses

2

WoS Citation Count

1999

Scopus Citation Count

1973

Patents

0

Projects

6

WoS Citations per Publication

33.88

Scopus Citations per Publication

33.44

Open Access Source

3

Supervised Theses

19

JournalCount
Applied Catalysis B: Environmental9
ChemistrySelect4
New Journal of Chemistry3
Analytical Chemistry1
Chemical Communications1
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Scholarly Output Search Results

Now showing 1 - 10 of 59
  • Master Thesis
    Manyetik-pedot-tio2 Nanokompozit Malzemenin Hazırlanması ve Fotokatalitik Uygulaması
    (2016) Erabe, Naden Mohammed Alı; Kaya, Murat
    Geleneksel atık su arıtma yöntemlerinin kirletici maddeleri etkili bir şekilde uzaklaştırılmasında yetersiz kalması nedeniyle yeni, etkili ve düşük maliyetli tekniklerin araştırılmasına neden olmuştur. Sıkı çevresel düzenlemelere katkı sağlamak için, bu organik maddelerin oksidasyonu önemlidir. Radikaller, sık sık kullanılan diğer yükseltgenlerle kıyaslandığında mükemmel bir oksitleme gücüne sahiptirler ve tam olarak bozulmayı sağlarlar. Geliştirilmiş oksidasyon prosesleri (AOPs) adı verilen yöntemler, homojen ve heterojen fotokatalitik yöntemleri kapsar. Bu yöntemlerde, yarıiletkenin aktivasyonu elektron ve deliklerin oluşmasına neden olur. Bu deliğin su ile tepkimesi hidroksil radikalini oluştururken, kirleticileri ortadan kaldırmak için bir seri indirgenme-yükseltgenme tepkimelerinin meydana gelmesini sağlar. Bu günlerde, özellikle TiO2'in yarı iletken fotokatalizör olarak kullanımı, havada ve su atık endüstrisinde elverişli olarak kullanılabilmesi nedeniyle önemlidir. Düşük maliyetli, çevre dostu, sürdürülebilir işleme metotlarının elde edilebilmesini sağlar. Ancak, küçük boyutta fotokatalizör parçacıklarının, büyük hacimlerdeki sudan uzaklaştırılması için daha fazla çaba gereklidir. Bu da, kullanımında büyük bir dezavantaja neden olmaktadır. Bu tezde, yüksek fotokatalitik aktivitesi ve iyi-ayırma özelliği olan malzeme elde edebilmek için, manyetik, geri dönüştürülebilir, yeni bir SiO2-CoFe2O4/PEDOT/TiO2 nanokompozit malzemenin fotokatalizör olarak kullanılabilmesi için hazırlanışı ile ilgili basit bir prosedür önermekteyiz. Nanokompozit katalizörün karakterizasyonu taramalı elektron mikroskopu (SEM), geçirimli elektron mikroskobu (TEM), yüksek çözünürlüklü geçirimli elektron mikroskobu (HR-TEM), SEM ile birleştirilen enerji dağılım X-Ray ve Raman spektroskopisi teknikleri ile yapılmıştır. SiO2-CoFe2O4/PEDOT/TiO2 nanokompozit malzemenin fotokatalitik aktivitesi metilen mavisinin UV ışığı altında boya giderimi ile araştırılmıştır. Ayrıca, TiO2 ve PEDOT'un fotokatalitik aktivitesi, son yapı ile karşılaştırılmıştır. Sonuç olarak, PEDOT polimerin varlığı ve TiO2 ile PEDOT arasındaki sinerjik ilişki, fotokatalitik tepkimede önemli bir rol oynar. Yüksek fotokatalitik aktivitesinin yanında, SiO2-CoFe2O4/PEDOT/TiO2 nanokompozit malzemenin, manyetik olarak ayrılma avantajı vardır. PEDOT içermesi, fotokatalitik aktivitesini arttırmasının yanı sıra, manyetik nanoparçacıklarının eklenmesi, son yapının manyetik özelliğinin de olmasına olanak sağlar.
  • Doctoral Thesis
    Yakın Kızılötesi Bölgede Yüksek Işık-ısı Çevrimine Sahip Özgün Nanoyapıların Hazırlanması ve Fototermal Etkinliklerinin Araştırılması
    (2023) Güner, Zuhal Selvi Vanlı; Kaya, Murat
    Nano boyutlu malzemelerin geniş yüzey alanı-hacim oranı, geçmişten bugüne kadar keşfedilen beklenmedik mekanik, elektriksel ve optik özellikler sayesinde yeni ve heyecan verici araştırma alanlarının ortaya çıkmasını sağlamıştır. Bu özellikler sayesinde nano-yapılar moleküler görüntüleme, erken hastalık teşhisi, doku mühendisliği, atık su arıtma, gıda paketleme, UV koruması, endüstriyel katalizörler, elektronik, piller ve kuantum bilgisayarlar alanlarında geniş bir uygulama alanı sunmaktadır. Hem altın nanoparçacıkların hem de manyetik nanoparçacıkların, ışık ısı çevrimi son zamanlarda deneysel ve teorik olarak incelenmektedir. Ancak daha önce de belirtildiği gibi bu dönüşüm özelliği her nanomalzemenin yapısına ve bileşimine bağlı olarak farklılık göstermektedir. Farklı nanoparçacık yapılarının dekore ve organize edilmesi ile nanoparçacıkların plazmonik özellikleri geliştirilerek ışıktan ısıya yüksek dönüşüm elde edilmesi mümkün gözükmektedir. Bu bilgiler ışığında, benzerlerinden farklı optik özellikleri nedeniyle yüksek ışık-ısı dönüşümüne sahip nanoyapıların hazırlanması amaçlanmıştır. Bu amaçla içi boş altın nanoparçacıklar ve silika kaplı manyetik demir oksit nanoparçacıklar üzerinde çalışılmıştır. Bu amaçla, içi boş altın nanoparçacıklar ve silika kaplı manyetik demir vi oksit nanoparçacıklar hazırlanmış ve daha sonra küçük boyutlu altın nanoparçacıklar ve gümüş-altın bimetalik nanoparçacıklar ile bezenmiştir. Bu çalışmada dört farklı nanoyapı hazırlanmış ve bunların ışığı ısıya dönüştürme kapasitesi araştırılmıştır. Bu yapılardan ilk ikisi, 24 nm boyutunda ve 5-10 nm kalınlığında kabuğa sahip içi boş altın nanoparçacıklar (HAuNPs) üzerine 1-3 nm boyutunda altın (AuNPs) ve gümüş-altın bimetalik nanoparçacıkların (AgAuNPs) eklenmesiyle hazırlanmıştır. (HAuNPs-AuNPs, HAuNPs-AgAuNPs). Üçüncü ve dördüncü parçacık yapıları, sırasıyla silika kabuk ile kaplanmış manyetik demir oksit nanoparçacıkların üzerine 1-3 nm boyutunda hem altın nanoparçacıklar ve altın-gümüş bimetalik nanoparçaçıklar eklenerek hazırlanmıştır(Fe3O4-SiO2-AuNPs, Fe3O4-SiO2-AgAuNPs). Hazırlanan yapıların karakterizasyonu, yüksek çözünürlüklü transmisyon elektron mikroskobu (HR-TEM), enerji dağılımlı X-ışını spektroskopisi (EDX), ultraviyole ve görünür spektroskopi (UV-Vis) ve titreşimli numune manyetometresi (VSM), ve hazırlanan yapıların fototermal etkileri, çözelti içinde, 808 nm dalga boyunda ışık kaynağı kullanılarak araştırılmıştır.
  • Article
    Citation - WoS: 130
    Mno<i><sub>x</Sub>< Pdag Alloy Nanoparticles for the Additive-Free Dehydrogenation of Formic Acid at Room Temperature
    (Amer Chemical Soc, 2015) Bulut, Ahmet; Yurderi, Mehmet; Karatas, Yasar; Say, Zafer; Kivrak, Hilal; Kaya, Murat; Zahmakiran, Mehmet
    Formic acid (HCOOH) has a great potential as a safe and a convenient hydrogen carrier for fuel cell applications. However, efficient and CO-free hydrogen production through the decomposition of formic acid at low temperatures (<363 K) in the absence of additives constitutes a major challenge. Herein, we present a new heterogeneous catalyst system composed of bimetallic PdAg alloy and MnOx nanoparticles supported on amine-grafted silica facilitating the liberation of hydrogen at room temperature through the dehydrogenation of formic acid in the absence of any additives with remarkable activity (330 mol H-2 center dot mol catalyst(-1)center dot h(-1)) and selectivity (>99%) at complete conversion (>99%). Moreover this new catalytic system enables facile catalyst recovery and very high stability against agglomeration, leaching, and CO poisoning. Through a comprehensive set of structural and functional characterization experiments, mechanistic origins of the unusually high catalytic activity, selectivity, and stability of this unique catalytic system are elucidated. Current heterogeneous catalytic architecture presents itself as an excellent contender for clean hydrogen production via room-temperature additive-free dehydrogenation of formic acid for on-board hydrogen fuel cell applications.
  • Correction
    Citation - WoS: 1
    Citation - Scopus: 2
    Supported Copper-Copper Oxide Nanoparticles as Active, Stable and Low-Cost Catalyst in the Methanolysis of Ammonia-Borane for Chemical Hydrogen Storage (vol 165, Pg 169, 2015)
    (Elsevier, 2016) Yurderi, Mehmet; Bulut, Ahmet; Ertas, Ilknur Efecan; Zahmakiran, Mehmet; Kaya, Murat
    [No Abstract Available]
  • Article
    Polysulfur Copolymer as a Support Material for the Preparation of a Novel Multifunctional Photocatalytic Composite Material
    (Springer, 2025) Kesimal, Busra; Guner, Zuhal Vanli; Cihaner, Atilla; Kaya, Murat; Vanli Guner, Zuhal
    One-step addition of magnetic nanoparticles and titanium dioxide nanoparticles into polysulfur copolymer as cheap and available support was reported for the first time to prepare the magnetically separable heterogeneous catalyst, PolyS-MNP-TiO2. The photocatalytic activities of the PolyS-MNP-TiO2 composite material and its constituents were examined in the methylene blue (MB) degradation, textile-based wastewater simulant, exposed to solar light. Detailed characterization of the catalysts was performed with SEM, TEM, and EDX measurements. The photocatalytic activity of the resulting composite was figured out in the removal of methylene blue dye by using a solar simulator. Significantly, the as-prepared PolyS-MNP-TiO2 exhibits exceptional photocatalytic activity and total degradation of dye molecules was achieved in 60 min. Additionally, the prepared novel photocatalyst showed enhanced stability and reusability due to the magnetic behavior of the composite material and the same portion of catalyst was used in five successive tries without apparent loss in catalytic activity by eliminating long and work-loaded processes like filtration and centrifugation.
  • Article
    Citation - WoS: 81
    Citation - Scopus: 86
    New Approach for the Surface Enhanced Resonance Raman Scattering (serrs) Detection of Dopamine at Picomolar (pm) Levels in the Presence of Ascorbic Acid
    (Amer Chemical Soc, 2012) Kayat, Murat; Volkan, Murvet; Kaya, Murat
    The development of a novel surface-enhanced resonance Raman scattering (SERRS) platform that allows fast and sensitive detection of dopamine (DA) has been reported. The iron-nitrilotriacetic acid attached silver nanoparticle (Ag-Fe(NTA)) substrate provides remarkable sensitivity and reliable repeatability. The advantages of both the surface functionalization for specific analytes and the SERRS are integrated into a single functional unit. While the silver core gives the necessary enhancing properties, the Fe-NTA receptors can trap DA adjacent the silver core and the NTA-Fe-DA complex formed provides resonance enhancement with a 632.8 nm laser. DA could be detected in pM level without any pretreatment with a reliable discrimination against AA, by utilizing low laser power (10 mW) and short data acquisition time (10 s). The high sensitivity along with the improved selectivity of this sensing approach is a significant step toward molecular diagnosis of Parkinson's disease.
  • Article
    Citation - WoS: 142
    Citation - Scopus: 149
    Carbon Dispersed Copper-Cobalt Alloy Nanoparticles: a Cost-Effective Heterogeneous Catalyst With Exceptional Performance in the Hydrolytic Dehydrogenation of Ammonia-Borane
    (Elsevier, 2016) Bulut, Ahmet; Yurderi, Mehmet; Ertas, Ilknur Efecan; Celebi, Metin; Kaya, Murat; Zahmakiran, Mehmet
    Herein, we report the development of a new and cost-effective nanocatalyst for the hydrolytic dehydrogenation of ammonia-borane (NH3BH3), which is considered to be one of the most promising solid hydrogen carriers due to its high gravimetric hydrogen storage capacity (19.6 wt%) and low molecular weight. The new catalyst system consisting of bimetallic copper-cobalt alloy nanoparticles supported on activated carbon was simply and reproducibly prepared by surfactant-free deposition-reduction technique at room temperature. The characterization of this new catalytic material was done by the combination of multi-pronged techniques including ICP-MS, XRD, XPS, BFTEM, HR-TEM, STEM and HAADF-STEM-line analysis. The sum of their results revealed that the formation of copper-cobalt alloy nanoparticles (d(mean) =1.8 nm) on the surface of activated carbon (CuCo/C). These new carbon supported copper-cobalt alloy nanoparticles act as highly active catalyst in the hydrolytic dehydrogenation of ammonia-borane, providing an initial turnover frequency of TOF = 2700 h(-1) at 298 K, which is not only higher than all the non-noble metal catalysts but also higher than the majority of the noble metal based homogeneous and heterogeneous catalysts employed in the same reaction. More importantly, easy recovery and high durability of these supported CuCo nanoparticles make CuCo/C recyclable heterogeneous catalyst for the hydrolytic dehydrogenation of ammonia-borane. They retain almost their inherent activity even at 10th catalytic reuse in the hydrolytic dehydrogenation of ammonia-borane at 298K. (C) 2015 Elsevier B.V. All rights reserved.
  • Article
    Citation - WoS: 16
    Citation - Scopus: 17
    Keggin Type-Polyoxometalate Decorated Ruthenium Nanoparticles: Highly Active and Selective Nanocatalyst for the Oxidation of Veratryl Alcohol as a Lignin Model Compound
    (Wiley-v C H verlag Gmbh, 2017) Baguc, Ismail Burak; Saglam, Serif; Ertas, Ilknur Efecan; Keles, Muhammed Nuri; Celebi, Metin; Kaya, Murat; Zahmakiran, Mehmet
    Described herein is a new nanocatalyst system that efficiently works in the aerobic oxidation of veratryl alcohol (VA), which is formed by cleavage of beta-O-4 linkages in lignin, to veratraldehyde (VAL) under mild reaction conditions. The new nanocatalyst system comprised of ruthenium(0) nanoparticles supported on the Keggin type polyoxometalate (POM; K-3[PMo12O40]) network (Ru/POM) can simply and reproducibly be prepared by the dimethylamine-borane ((CH3)(2)NHBH3) reduction of ruthenium(III) chloride trihydrate (RuCl3.3H(2)O) in isopropanol solution of K-3[P Mo12O40] at room temperature. The characterization of Ru/POM by the combination of various analytical techniques reveals that the formation of well-dispersed ruthenium(0) nanoparticles with a mean diameter of 4.7 +/- 1.2nm on the surface of POM network structure. This new Ru/POM nanocatalyst displays remarkable activity (TOF=7.5mol VAld/mol Ru x h) at high selectivity (> 98%) and almost complete conversion (98%) in the aerobic oxidation of VA to VAld under mild conditions.
  • Article
    Citation - WoS: 24
    Citation - Scopus: 25
    Complete Dehydrogenation of Hydrazine Borane on Manganese Oxide Nanorod-Supported Ni@ir Core-Shell Nanoparticles
    (Amer Chemical Soc, 2020) Yurderi, Mehmet; Top, Tuba; Bulut, Ahmet; Kanberoglu, Gulsah Saydan; Kaya, Murat; Zahmakiran, Mehmet
    Hydrazine borane (HB; N2H4BH3) has been considered to be one of the most promising solid chemical hydrogen storage materials owing to its high hydrogen capacity and stability under ambient conditions. Despite that, the high purity of hydrogen production from the complete dehydrogenation of HB stands as a major problem that needs to be solved for the convenient use of HB in on-demand hydrogen production systems. In this study, we describe the development of a new catalytic material comprised of bimetallic Ni@Ir core-shell nanoparticles (NPs) supported on OMS-2-type manganese oxide octahedral molecular sieve nanorods (Ni@Ir/OMS-2), which can reproducibly be prepared by following a synthesis protocol including (i) the oleylamine-mediated preparation of colloidal Ni@Ir NPs and (ii) wet impregnation of these ex situ synthesized Ni@Ir NPs onto the OMS-2 surface. The characterization of Ni@Ir/OMS-2 has been done by using various spectroscopic and visualization techniques, and their results have revealed the formation of well-dispersed Ni@Ir core-shell NPs on the surface of OMS-2. The catalytic employment of Ni@Ir/OMS-2 in the dehydrogenation of HB showed that Ni-0.22@Ir-0.78/OMS-2 exhibited high dehydrogenation selectivity (>99%) at complete conversion with a turnover frequency (TOF) value of 2590 h(-1) at 323 K, which is the highest activity value among all reported catalysts for the complete dehydrogenation of HB. Furthermore, the Ni-0.22@Ir-0.78/OMS-2 catalyst enables facile recovery and high stability against agglomeration and leaching, which make it a reusable catalyst in the complete dehydrogenation of HB. The studies reported herein also include the collection of wealthy kinetic data to determine the activation parameters for Ni-0.22@Ir-0.78/OMS-2-catalyzed dehydrogenation of HB.
  • Article
    Citation - WoS: 26
    Citation - Scopus: 29
    The Pimpled Gold Nanosphere: a Superior Candidate for Plasmonic Photothermal Therapy
    (Dove Medical Press Ltd, 2020) Nasseri, Behzad; Turk, Mustafa; Kosemehmetoglu, Kemal; Kaya, Murat; Piskin, Erhan; Rabiee, Navid; Webster, Thomas J.
    Background: The development of highly efficient nanoparticles to convert light to heat for anti-cancer applications is quite a challenging field of research. Methods: In this study, we synthesized unique pimpled gold nanospheres (PGNSs) for plasmonic photothermal therapy (PPTT). The light-to-heat conversion capability of PGNSs and PPTT damage at the cellular level were investigated using a tissue phantom model. The ability of PGNSs to induce robust cellular damage was studied during cytotoxicity tests on colorectal adenocarcinoma (DLD-1) and fibroblast cell lines. Further, a numerical model of plasmonic (COMSOL Multiphysics) properties was used with the PPTT experimental assays. Results: A low cytotoxic effect of thiolated polyethylene glycol (SH-PEG400-SH-) was observed which improved the biocompatibility of PGNSs to maintain 89.4% cell viability during cytometry assays (in terms of fibroblast cells for 24 hrs at a concentration of 300 mu g/mL). The heat generated from the nanoparticle-mediated phantom models resulted in Delta T=30 degrees C, Delta T=23.1 degrees C and Delta T=21 degrees C for the PGNSs, AuNRs, and AuNPs, respectively (at a 300 mu g/mL concentration and for 325 sec). For the in vitro assays of PPTT on cancer cells, the PGNS group induced a 68.78% lethality (apoptosis) on DLD-1 cells. Fluorescence microscopy results showed the destruction of cell membranes and nuclei for the PPTT group. Experiments further revealed a penetration depth of sufficient PPTT damage in a physical tumor model after hematoxylin and eosin (H&E) staining through pathological studies (at depths of 2, 3 and 4 cm). Severe structural damages were observed in the tissue model through an 808-nm laser exposed to the PGNSs. Conclusion: Collectively, such results show much promise for the use of the present PGNSs and photothermal therapy for numerous anti-cancer applications.