Genç, Aziz
Loading...
Profile URL
Name Variants
Genç, A
Gencì, Aziz
Gencç, Aziz
Genc, Aziz
Genc, A.
Genç, A.
Gen?, Aziz
Genc, A
Gencì, Aziz
Gencç, Aziz
Genc, Aziz
Genc, A.
Genç, A.
Gen?, Aziz
Genc, A
Job Title
Email Address
azizgenc@iyte.edu.tr
Main Affiliation
03.09. Department of Materials Science and Engineering
Status
Current Staff
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
Research Products
3GOOD HEALTH AND WELL-BEING
0
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
3
Research Products
7AFFORDABLE AND CLEAN ENERGY
4
Research Products
8DECENT WORK AND ECONOMIC GROWTH
1
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
3
Research Products
10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
2
Research Products
13CLIMATE ACTION
2
Research Products
14LIFE BELOW WATER
1
Research Products
15LIFE ON LAND
0
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents
77
Citations
3047
h-index
29
Documents
76
Citations
2930
Scholarly Output
16
Articles
11
Views / Downloads
9945/4853
Supervised MSc Theses
3
Supervised PhD Theses
1
WoS Citation Count
284
Scopus Citation Count
284
Patents
0
Projects
0
WoS Citations per Publication
17.75
Scopus Citations per Publication
17.75
Open Access Source
10
Supervised Theses
4
| Journal | Count |
|---|---|
| Advanced Materials | 2 |
| Beilstein Journal of Nanotechnology | 2 |
| Journal of Alloys and Compounds | 1 |
| Journal of Materials Chemistry C | 1 |
| Materials | 1 |
Current Page: 1 / 2
Scopus Quartile Distribution
Competency Cloud
16 results
Scholarly Output Search Results
Now showing 1 - 10 of 16
Article Citation - WoS: 39Citation - Scopus: 39Polarized Emission From Cspbbr3 Nanowire Embedded-Electrospun Pu Fibers(IOP Publishing Ltd., 2018) Güner, Tuğrul; Topçu, Gökhan; Savacı, Umut; Genç, Aziz; Sarı, Emre; Demir, Mustafa MuammerInterest in all-inorganic halide perovskites has been increasing dramatically due to their high quantum yield, band gap tunability, and ease of fabrication in compositional and geometric diversity. In this study, we synthesized several hundreds of nanometer long and ∼4 nm thick CsPbBr3 nanowires (NWs). They were then integrated into electrospun polyurethane (PU) fibers to examine the polarization behavior of the composite fiber assembly. Aligned electrospun fibers containing CsPbBr3 NWs showed a remarkable increase in the degree of polarization from 0.17-0.30. This combination of NWs and PU fibers provides a promising composite material for various applications such as optoelectronic devices and solar cells.Master Thesis Synthesis of Titanium-Based Powders From Machining Waste by Using the Hydrogenation-Dehydrogenation Method(Izmir Institute of Technology, 2022) Çuhadaroğlu, Zeynep; Genç, Aziz; Gökelma, Mertol; Genç, Aziz; Gökelma, MertolSustainability and recycling activities have gained importance in almost every field all over the world. Many studies are conducted to recycle titanium and titanium alloys owing to their outstanding properties like low density, biocompatibility, corrosion resistance, and high strength-to-weight ratio. Although they offer superior properties, their usage is limited due to their high production cost and potential to generate waste, and therefore, recycling activities in this area should be expanded using an appropriate method. Cold hearth melting, vacuum arc re-melting, and hydrogenation and dehydrogenation process are widely used for recycling titanium scraps in industry. Among them, the hydrogenation and dehydrogenation (HDH) process has a significant environmental and economic impact. In this thesis, titanium powders were synthesized from additive manufacturing turnings. Ti-6Al-2Sn-4Zr-6Mo turnings were used as starting materials on which HDH characteristics were not investigated in the literature. Both hydrogenation and dehydrogenation parameters were studied to reach optimum conditions. Our results revealed that hydrogenation was accomplished at 500 °C for 120 minutes with 5 °C/minute heating rate. The optimum dehydrogenation condition was found at 600 °C for 90 minutes. Ti-6Al-2Sn-4Zr-6Mo powder with average 56 μm particle size was synthesized; however, hydrogen and oxygen concentrations in the powder were not at the desired level and non-spherical shaped powders were produced end of the process.Article Citation - WoS: 3Citation - Scopus: 4A Facile Method for Boosting the Graphitic Carbon Nitride's Photocatalytic Activity Based on 0d/2d S-Scheme Heterojunction Nanocomposite Architecture(Elsevier, 2024) Kahraman, Zeynep; Kartal, Uğur; Gent, Aziz; Alp, EmreGraphitic carbon nitride (g-C 3 N 4 ) has received significant interest as a metal -free photocatalyst. The S -scheme photocatalytic system has great potential to improve the charge separation in semiconductor photocatalysts. In this study, we have fabricated non-toxic and low-cost photocatalytic nanocomposites of 0D/2D S -scheme heterojunction composed of iron oxide and graphitic carbon nitride by a facile method. The developed facile method provides a sustainable way with a high atom economy to further enhance the photocatalytic performance of exfoliated g-C 3 N 4 . The 0D -iron oxide/2D-C 3 N 4 exhibited nearly 10 times better than bulk g-C 3 N 4 and almost 60 % better than exfoliated g-C 3 N 4 under simulated solar light irradiation. The experimental results demonstrated that the effective charge -carrier mechanism led to an improved generation of reactive oxygen species (ROSs), resulting in an impressive photocatalytic performance. A serial photocatalytic test was also conducted to understand photocatalytic reaction mechanisms with various scavengers.Master Thesis Piezocatalytic and Piezoelectric Properties of P(vdf) and Its Copolymer/Terpolymer Films(01. Izmir Institute of Technology, 2023) Tengizdeniz, Ceren; Adem, Umut; Genç, AzizNowadays, the release of colored organic pollutants such as Rhodamin B dye, resulting from industrial activities endanger the people, animals, and plants. Many methods have developed to destroy these harmful pollutants. Piezocatalysis, a newly used environmentally friendly method, takes advantage of the piezoelectric effect, and uses mechanical vibration to produce active species on opposite surfaces of matter for degradation of dye. In this study, piezocatalytic and piezoelectric properties of P(VDF) based homopolymer, copolymer and terpolymers were investigated. With the addition of 2nd and 3rd monomer to the homopolymer, observation of change in piezoelectric and piezocatalytic properties and removal efficiency of pollution in water, were aimed. P(VDF) homopolymer, P(VDF-TrFE) copolymers with composition of 55/45 and 50/50 mol%, and P(VDF-TrFE-CTFE) terpolymer with 62/31/7 mol% were synthesized by solution casting method. It was observed that the 2nd and 3rd monomer added to the homopolymer enhanced the piezoelectric properties and strain characteristics of the polymers. Maximum polarization and strain of terpolymer was observed as 11 µC/cm2 and 5.6 %, respectively. Due to the increase in piezoelectricity, a noticeable increase in piezocatalytic properties was observed. Terpolymer exhibited the highest and most efficient piezoelectric and piezocatalytic performance. P(VDF) homopolymer was reached 27% dye degradation efficiency. While copolymers with mol% 55/45 and 50/50, dye degradation efficiencies were 40% and 47%, respectively, terpolymer efficiency was 54%. From the dielectric measurements, within the transition region (49 mol% ≤ CVDF ≤ 55 mol%) of P(VDF-TrFE), both normal-ferroelectric and relaxor characteristics were observed. Terpolymer showed relaxor properties as expected.Article Citation - WoS: 18Citation - Scopus: 14Optimization and Performance of Nitrogen-Doped Carbon Dots as a Color Conversion Layer for White-Led Applications(Beilstein-Institut Zur Forderung der Chemischen Wissenschaften, 2019) Güner, Tuğrul; Yüce, Hürriyet; Taşçıoğlu, Didem; Şimşek, Eren; Savacı, Umut; Genç, Aziz; Demir, Mustafa MuammerIn this study, green-emitting nitrogen-doped carbon dots (N-CDots) were synthesized and incorporated into drop-cast composite films for use as color conversion layers in a white-LED configuration to generate white light. In order to resolve the red deficiency of this configuration, a commercial red phosphor was integrated into the system. Moreover, the N-CDots were also processed into polymer/N-CDot composite fibers, for which we determined the amount of N-CDots that yielded adequate white-light properties. Finally, we showed that white light with excellent properties could be generated by employing both of the fabricated N-CDot composites either as drop-cast films or composite fibers. Hence, N-CDots provide a promising alternative to inorganic phosphors that are commonly employed in white-LED configurations.Doctoral Thesis Synthesis, Properties and Applications of Tungsten Oxide Nanostructures(01. Izmir Institute of Technology, 2023) Kahraman, Zeynep; Balcı, Sinan; Genç, AzizIn this study, tungsten oxide nanostructures, which are n-type semicon ductors with a band gap between 2.6-2.8, have been studied extensively. The hydrothermal method was used as the synthesis technique and the phases and morphologies were optimized in a stable and controllable manner. Firstly, sto ichiometric tungsten oxide nanowires with certain ratios were synthesized, and then cobalt doping was made using this synthesis technique. Subsequently, sub-stoichiometric tungsten oxide nanowires, which have oxygen gaps and can show plasmonic properties due to the increased carrier density, were synthe sized, and tungsten oxides with a flower-like hierarchical structure with oxygen gaps were synthesized and grouped according to possible application areas. Accordingly, how oxygen vacancies and hierarchical structures affect pho tocatalysis applications have been examined and it has been seen that ub stoichiometric tungsten oxide works faster until it reaches a certain saturation than stoichiometric tungsten oxide. According to this study, how the system can be manipulated by adding low pH to the system and hydrogen peroxide as an electron acceptor, respectively. It has been observed that it can be done. Hierarchical tunsten oxide has been found to be an ideal catalyst that can work quickly in photocatalysis studies due to its hierarchical structure, which has oxygen vacancies and can absorb light well. Additionally, tungsten oxide attracts attention as a material used in su percapacitor applications. Supercapacitors are long-lasting and fast-reacting electrochemical devices that can provide high power in energy storage and dis charge processes. The use of tungsten oxide in supercapacitor applications can be summarized as follows: when nanoparticles with large surface area are used as electrode material, they increase the interaction with the electrochemical surface and can increase the energy storage capacity. It shows high electro chemical activity as an electrode material. This feature contributes to the high performance of the supercapacitor. Tungsten oxide has a structure suitable for electron and ion conduction. This allows the supercapacitor to have fast charge/discharge capabilities and low internal resistance. Tungsten oxide can show stable performance during electrochemical cycles. This feature ensures the long life of the supercapacitor. In supercapacitor applications, in addition to these features, the electrical conductivity of the material can be increased by increasing the number of electrons carried in the material due to its oxygen gap. Accordingly, we investigated the comparative electrochemical properties and cycling stability of stoichiometric and sub-stoichiometric nanowires. Thanks to its electrochromic properties, the latest application has observed electrochromic changes of oxygen vacancies and cobalt dopingArticle Citation - WoS: 16Citation - Scopus: 16Exploiting the Lability of Metal Halide Perovskites for Doping Semiconductor Nanocomposites(American Chemical Society, 2021) Calcabrini, Mariano; Genç, Aziz; Liu, Yu; Kleinhanns, Tobias; Lee, Seungho; Dirin, Dmitry N.; Akkerman, Quinten A.Cesium lead halides have intrinsically unstable crystal lattices and easily transform within perovskite and nonperovskite structures. In this work, we explore the conversion of the perovskite CsPbBr3 into Cs4PbBr6 in the presence of PbS at 450 degrees C to produce doped nanocrystal-based composites with embedded Cs4PbBr6 nanoprecipitates. We show that PbBr2 is extracted from CsPbBr3 and diffuses into the PbS lattice with a consequent increase in the concentration of free charge carriers. This new doping strategy enables the adjustment of the density of charge carriers between 10(19) and 10(20) cm(-3), and it may serve as a general strategy for doping other nanocrystal-based semiconductors.Article Citation - WoS: 3Citation - Scopus: 3Green Fabrication of Lanthanide-Doped Hydroxide-Based Phosphors: Y(oh)(3):eu3+ Nanoparticles for White Light Generation(Beilstein-Institut Zur Forderung der Chemischen Wissenschaften, 2019) Güner, Tuğrul; Kuş, Anılcan; Özcan, Mehmet; Genç, Aziz; Şahin, Hasan; Demir, Mustafa MuammerPhosphors can serve as color conversion layers to generate white light with varying optical features, including color rendering index (CRI), high correlated color temperature (CCT), and luminous efficacy. However, they are typically produced under harsh synthesis conditions such as high temperature, high pressure, and/or by employing a large amount of solvent. In this work, a facile, water-based, rapid method has been proposed to fabricate lanthanide-doped hydroxide-based phosphors. In this sense, sub-micrometer-sized Y(OH)(3):Eu3+ particles (as red phosphor) were synthesized in water at ambient conditions in <= 60 min reaction time. The doping ratio was controlled from 2.5-20 mol %. Additionally, first principle calculations were performed on Y(OH)(3):Eu3+ to understand the preferable doping scenario and its optoelectronic properties. As an application, these fabricated red phosphors were integrated into a PDMS/YAG:Ce3+ composite and used to generate white light. The resulting white light showed a remarkable improvement (approximate to 24%) in terms of luminous efficiency, a slight reduction of CCT (from 3900 to 3600 K), and an unchanged CRI (approximate to 60) as the amount of Y(OH)(3):Eu3+ was increased.Article Citation - WoS: 1Citation - Scopus: 1Phase-Dependent Optical, Photocatalytic and Capacitive Properties of Tungsten Oxide Nanowires(Royal Soc Chemistry, 2025) Kahraman, Zeynep; Gungor, Ahmet; Buldu-Akturk, Merve; Tan, Metin; Alp, Emre; Erdem, Emre; Genc, AzizTransition metal oxides hold great promise across a wide range of applications due to favorable properties such as high abundance, low toxicity, and excellent stability. Nanoengineering approaches are essential for controlling the structural, optical, and electronic properties of these materials, enabling the achievement of desired characteristics in a cost-effective and environmentally friendly manner. In this study, we synthesize stoichiometric (WO3) and sub-stoichiometric (WO3-x) tungsten oxide nanowires by controlling their phases and morphologies through the hydrothermal method. This approach allows us to systematically investigate the effects of different phases and oxygen vacancies on the optical properties, as well as on photocatalytic and supercapacitance applications. We use the photodegradation of RhB as a benchmark for photocatalytic activity under various experimental conditions, revealing that oxygen vacancies significantly influence photocatalytic behavior. For example, WO3-x nanowires adsorb/degrade a substantial amount of RhB within short durations under ambient conditions, where WO3 nanowires are mostly inactive. The addition of H2O2 enhances the photocatalytic performance of WO3 nanowires over 30 minutes, with even better results under low pH conditions with H2O2. This study also explores the phase-dependent electrochemical properties of WO3 and WO3-x nanowires, providing insights into their potential for improved supercapacitor performance by leveraging their complementary properties in symmetric and asymmetric configurations. WO3-x, with a higher density of oxygen vacancies and thinner structure, offers enhanced conductivity and increased active sites for charge storage, resulting in superior specific capacitance and charge retention.Publication Farklı Plazmon Geometrilerinin Nadir Toprak Iyonu Takviyeli Metalik Nanopartiküllerin Üst Enerji Dönüşüm Verim Artışına Etkisinin Incelenmesi(2022) Ersundu, Miray Çelikbilek; Ersundu, Ali Erçin; Genç, AzizRare-earth activated upconverting nanoparticles (RE-UCNPs) have recently come into light for their potential applications such as bioimaging and photovoltaics due to their excellent chemical and spectral properties. However, RE-UCNPs usually suffer from low upconversion emission efficiency owing to the small absorption cross sections induced by the forbidden transitions between 4f orbitals of the REs. Therefore, the upconverting materials synthesized till today remain too inefficient for viable implementation. For instance, the quantum yield of the extensively studied ß-NaYF4 nano crystals codoped with Yb3+ and Er3+ is usually below 1%. Researchers have been diligently working to develop new techniques and methodologies to increase the upconversion efficiency. Although significant progress has been made, the research is still ongoing to develop better strategies. Plasmon resonances can be used to achieve high upconversion efficiency by enhancing the incident electromagnetic field intensity and the radiative emission rates. Accordingly, upconversion efficiency can be enhanced by the effects and changes that occur when plasmonic materials are brought within the close proximity of the UCNPs. The intensity and peak location of the absorption and scattering spectra which also assists excitation and emission spectra are highly dependent on the composition, size and geometry of plasmonic nanoparticles. Until today, luminescence properties of various RE-UCNPs have been studied, however their luminescence efficiency did not meet the expectations due to the low absorption and excitation cross section of the rare-earth ions and non-radiative decay. Therefore, in several studies effects of plasmon enhancement on luminescence efficiency of RE-UCNPS have been investigated. Different plasmonic structures change the absorption spectrum and the radioactive decay rate affecting the emission intensity of RE-UCNPs. However, to the best of our knowledge, the effect of plasmonic structure geometry on upconversion efficiency is uncertain and hence need to be clarified. Therefore, in this project, an experimental analysis of plasmon enhanced upconversion was realized by investigating the effect of different geometrical gold plasmonic structures with different sizes and mutual separations on upconversion efficiency of RE-UCNPs for high luminescence intensity upconversion materials. In this project, the co-doped ß-NaYF4:17%Yb3+/3%Er3+ RE-UCNPs were synthesized using hydro(solvo)-thermal route. Au nanoparticles were formed via electron beam lithography in four different geometries (rectangular, elliptical, triangular and spherical disks) with different sizes (1000-50nm) and mutual separations (250-50nm). ß-NaYF4:17%Yb3+/3%Er3+ solutions were then spin-coated on the substrate with prefabricated gold plasmonic structures having different geometries to obtain plasmon enhanced RE-UCNPs. Structural characterizations of plasmon enhanced RE-UCNPs were achieved by FTIR spectroscopy and Raman spectroscopy. Size and geometry of plasmon enhanced RE-UCNPs were characterized using SEM. Spectroscopic investigations of plasmon enhanced RE-UCNPs with emphasis on their optical absorption, excitation and emission were realized. The UC emission spectra, effect of the addition and the geometry of plasmonic structures on the luminesence efficiency and color quality parameters were evaluated. The overall luminesence efficiency enhancement rates were analyzed. These findings can benefit not only the use of upconversion luminescence for renewable energy and biological applications, but can also have important implications for improving other fluorescence and excitonic systems like organic and other excitonic solar cells.