Profile URL: https://hdl.handle.net/20.500.13091/11626
Job Title:Doç. Dr.
Email Address:ideveci@ktun.edu.tr
Main Affiliation:07. 04. Department of Chemistry and Chemical Processing Technologies
Status: Current Staff
ORCID:
0000-0002-2753-2301
0000-0002-2753-2301Scopus ID:
35955890400
35955890400 YÖK Akademik: F67004860D20E6DD
Google Scholar:
ZKenTmYAAAAJ
ZKenTmYAAAAJWeb of Science ID:
AAX-5589-2020
AAX-5589-2020Name Variants:
Deveci, Ilyas
17 results
Scholarly Output Search Results
Now showing 1 - 10 of 17
Article A Comparative Study for Lipase Immobilization onto Alginate Based Composite Electrospun Nanofibers with Effective and Enhanced Stability(2016) Doğaç, Yasemin İspirli; Deveci, İlyas; Teke, Mustafa; Mercimek, BedrettinArticle Citation - WoS: 5Citation - Scopus: 6Zn2+-Doped Pva Composite Electrospun Nanofiber for Upgrading of Enzymatic Properties of Acetylcholinesterase**(WILEY-V C H VERLAG GMBH, 2020-12-02) Işık, Ceyhun; Doğaç, Yasemin İspirli; Deveci, İlyas; Teke, MustafaEnzyme immobilization provides improve mechanical characteristic of enzymes and stability to environmental alters. It also helps to enzymes maintain their activities for a long time and offers the possibility to use them again. With these unique features, they can reduce production costs in industrial applications. In this study, acetylcholinesterase (AChE) immobilized on Zn2+-doped PVA nanofibers via adsorption and cross-linking methods. Morphological structures of Zn2+-doped PVA nanofibers were characterized by Scanning Electron Microscopy (SEM) before and after immobilization. It was observed that the enzyme gained resistance against temperature and pH changes occurring in the reaction medium after immobilization process. In addition, immobilized Zn2+-doped PVA nanofibers retained of its activity approximately 75 % after 8 reuse and its activity decreased below 50 % after 12 reuse. As a result, AChE immobilized Zn2+-doped PVA nanofibers offers numerous advantages for various biotechnological applications, such as hydrolysis and determination of pesticides, use in the structure of reactors and electrodes, thanks to the unique stability and reusability features that AChE gains after immobilization.Article A Greener Solution: Spent Bleaching Earth as a Sustainable Adsorbent for Wastewater Treatment(Elsevier, 2026) Naz, Saba; Deveci, Ilyas; Shar, Zahid Hussain; Sherazi, Syed Tufail Hussain; Kandhro, Mansoor Ahmed; Topkafa, Mustafa; Mahesar, Sarfaraz AhmedSpent Bleaching Earth (SBE), a byproduct generated in large volumes by the vegetable oil refining industry, presents a significant environmental challenge due to its high oil content, flammability, and limited disposal options. Traditional disposal methods, such as landfilling, are not only environmentally harmful but also economically unsustainable. However, recent research highlights the potential of SBE as a low-cost and effective adsorbent for removing synthetic dyes and other pollutants from industrial wastewater, particularly in the textile sector. The physicochemical characteristics of SBE that enable its adsorption capabilities are explored, along with recent advancements in its regeneration and modification for improved dye removal efficiency. Its performance is also evaluated compared to conventional adsorbents. By emphasizing SBE's role in wastewater treatment, the potential of repurposing it as a sustainable solution that aligns with circular economy principles is highlighted. Current challenges, regulatory considerations, and future perspectives on scaling up the application of SBE in industrial wastewater treatment processes are also discussed.Article Citation - WoS: 4Citation - Scopus: 5Synthesis of Na-Alginate Templated Montmorillonite-Silica Composite as Adsorbent for Removal of Rhodamine B(Springer, 2024-04-13) Deveci, İlyasIn this study, mesoporous Montmorillonite-Silica composites prepared by using different amount Alginate as sacrificial template, for removal of Rhodamine B is investigated. By alternating Alginate amount it is aimed to switch the porosity of adsorbents thus the adsorption capacities of adsorbents. Synthesized adsorbents had been characterized by using Scanning Electron Microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and N2-Ads/Des techniques. It is observed that beside the decrease in the micropore volume, the total pore volume of the adsorbents increased with the increasing of used Alginate amount. The total pore volumes of adsorbents synthesized with different Clay/Alginate ratio (10, 5, 1) were found as 0.116, 0.172, and 0.178 cm3/g, respectively. Batch adsorption studies showed that the maximum removal efficiencies were obtained at acidic conditions and the adsorbents had better fit with Freundlich isotherm. Qm values obtained from Langmuir isotherm were found as 24.47, 31.97 and 28.48 mg/g for synthesized adsorbents. Also, adsorption kinetic studies showed that for all adsorbents, experimental data had good fit to the pseudo-second order kinetics model. The model parameters were found as 5.9,6.3 and 6.5 (10-3 g/ (mg min). Thermodynamic parameters were also investigated in the study. Negative increment Go values pointed out that the adsorption of RhB onto synthesized adsorbents was favorable process. Positive values of increment Ho and Delta S indicated that the adsorption of RhB on adsorbents were endothermic and rising of randomness during the adsorption of RhB on the surface of the adsorbent. Adsorbents could be recovered at least five times without significant decrease in adsorption capacity.Article Citation - WoS: 68Citation - Scopus: 75Synthesis and Characterization of Electrospun Pva/Zn2+ Metal Composite Nanofibers for Lipase Immobilization With Effective Thermal, Ph Stabilities and Reusability(ELSEVIER SCIENCE BV, 2019-06-01) Işık, Ceyhun; Arabacı, Gökmen; Doğaç, Yasemin İspirli; Deveci, İlyas; Teke, Mustafa; Deyeci, IlyasPolyvinyl alcohol (PVA)/Zn2+ electrospun nanofibers that were a kind of polymer/ionic metal composite was successfully embedded in the hybrid fibers for the first time in the literature, due to chemical interactions between PVA and Zn2+. Also, the nanofibers were used as carriers for the first time in enzyme immobilization. The nanofibers were optimized and synthesized by electrospinning technique according to the operational parameters like as PVA concentration (%), Zn2+ concentration (%), voltage (kV), needle tip-collector distance (cm) and injection speed (ml/h). The morphology and structure of the nanofibers were characterized by SEM, XRD, ATR-FTIR and TGA. Lipase was immobilized on the nanofibers by adsorption and crosslinking methods. According to immobilization results, nanofiber enhanced enzyme stability properties like as thermal stability, pH stability and reusability. Lipase immobilized nanofiber protected 90% of its activity after 14 reuses.Article Enhanced Sonocatalytic Degradation of Organic Pollutants Using Noble-Metal-Doped Electrospun TiO2 Nanofibers(2026) Deveci, İlyasIn this study, the sonocatalytic oxidation performance of electrospun TiO2 nanofibers modified with noble metals (Pt, Pd, Ag, Ce, Cu) was systematically investigated for the degradation of Rhodamine B (RhB) as a model organic pollutant. TiO2 nanofibers were synthesized via the electrospinning method and calcined at 550 °C to obtain stable anatase-phase structures. Metal incorporation was performed through wet impregnation followed by thermal treatment, resulting in homogeneously dispersed metal nanoparticles anchored on the TiO2 surface. Characterization analyses (SEM, XRD, FTIR, BET) confirmed uniform fibrous morphology, preservation of the anatase phase, and increased surface area upon metal loading. Sonocatalytic degradation experiments were conducted under varying pH (3–10) and oxidant (H₂O₂) concentrations. Among the investigated catalysts, the sonocatalytic activity followed the order Pt–TiO₂ > Ce–TiO₂ > Cu–TiO₂ ≈ Pd–TiO₂ > TiO₂ > Ag–TiO₂, with Pt–TiO₂ exhibiting the highest RhB degradation efficiency. Among the tested catalysts, Pt–TiO2 nanofibers exhibited the highest degradation efficiency (~95%), followed by Ce–TiO2 (~70%), while Pd–TiO2 and Cu–TiO2 showed moderate activity (45–55%). The Ag–TiO2 sample displayed the lowest performance (~40%) due to possible nanoparticle aggregation and reduced active surface area. Kinetic analysis revealed that the degradation process predominantly followed pseudo-first-order kinetics, with apparent rate constants (k) of 0.0020, 0.0146, 0.0033, 0.0005, 0.0011, and 0.0034 min⁻¹ for TiO₂, Pt–TiO₂, Pd–TiO₂, Ag–TiO₂, Ce–TiO₂, and Cu–TiO₂, respectively. The optimal degradation occurred at neutral pH, whereas the addition of 0.001 M H₂O₂ lowered efficiency through radical scavenging effects. These results demonstrate that noble-metal-enriched TiO2 nanofibers synthesized via electrospinning possess high activity, stability, and recyclability under ultrasonic irradiation, offering great potential for sustainable wastewater treatment and the advancement of green sonochemical oxidation technologies.Article Impact of Heating on Olive Oil: Oxidative Changes and Physicochemical Properties(Konya Teknik Univ, 2025) Topkafa, Mustafa; Sherazi, Syed Tufail Hussain; Mahesar, Sarfaraz Ahmed; Kandhro, Mansoor Ali; Deveci, İlyasThis study aimed to analyze the physicochemical parameters of various brands of olive oil (OO) available in the local markets of Hyderabad, Pakistan. The parameters studied include concentrations of chlorophyll, β-carotene, free fatty acid (FFA), conjugated diene (CD), conjugated triene (CT), and oxidative stability. The results showed that none of the analyzed (OO) is recommended for cooking due to high FFA levels, but all except one could be used as salad oil. Through a systematic analysis, we also examined the impact of heating on chlorophyll and β - carotene levels in commercial OO brands. Our findings elucidate the varying responses of OO brands to heating, with distinct alterations observed in chlorophyll, and β -carotene levels. Furthermore, the FTIR analysis provided valuable insights into the molecular changes and oxidative stability of the oils under different heating conditions. These findings have significant implications for both consumers and the OO industry, as they provide valuable insights into the selection of high-quality OO brands that maintain their nutritional integrity and flavor profiles during cooking.Article Valorization of Spent Bleaching Clay Via Silica Modification for High-Performance Rhodamine B Adsorption: Optimization, Isotherm, and Kinetic Analysis(Wiley-VCH Verlag GmbH, 2026) Kandhroo, Mansoor Ali; Deveci, Ilyas; Topkafa, Mustafa; Cinar, Naciye; Erden, Lutfi; Mahesar, Sarfaraz Ahmed; Sherazi, Syed Tufail HussainThis study investigated the valorization of spent bleaching clay (SBC) to produce high-surface-area adsorbents for dye removal. Unlike conventional regeneration routes that involve high-temperature treatment and result in surface deterioration, the organic matter on SBC was replaced with cetyltrimethylammonium bromide, followed by silica modification of the interlayer structure. The obtained materials were compared with raw bleaching clay (RBC) and pyrolyzed bleaching clay (PBC). The surface areas of PBC and silica-modified bleaching clay (Si-BC) were 49.92 and 96.77 m2/g, respectively. A 3-factor, 3-level design was used to evaluate Rhodamine B (Rh-B) removal performance. For all samples, removal efficiency decreased with increasing pH. Among the tested isotherms, the Khan model provided the best fit. Langmuir monolayer capacities were 230.8, 69.9, and 131.8 mg/g for RBC, PBC, and Si-BC, respectively. Kinetic results indicated pseudo-second-order behavior for RBC, Elovich kinetics for PBC, and pseudo-first-order behavior for Si-BC. Thermodynamic analysis showed that Rh-B adsorption onto RBC and PBC was exothermic and spontaneous, whereas adsorption onto Si-BC was endothermic but still spontaneous. Overall, silica modification significantly enhanced the structural properties and adsorption performance of SBC-derived materials.Article Citation - WoS: 4Citation - Scopus: 4Synthesis of Silica Based Nanoparticles Against the Proliferation of Human Prostate Cancer(Bentham Science Publ Ltd, 2021-12-23) Durmuş, İrem M.; Deveci, İlyas; Karakurt, SerdarBackground: Prostate cancer (PCa) has the second-highest morbidity and mortality rates in men. Possessing facile surface chemistry and unique optical properties make silica nanoparticles(SiO2-NPs) promising cancer therapy materials. Objective: This study aimed to investigate the effects of SiO2-NPs and their derivatives, including SiNP-NH2, SiNP-Cl, and SiNP-SH against PCa and clarify their molecular mechanism on cell death, gene, and protein expressions. Methods: Following the synthesis and derivation of SiO2-NPs, their characterization was carried out using TEM, DLS, BET, and FT-IR. Cytotoxic properties of the compounds were investigated against different human cancerous cells; including HUH-7, A549, DLD-1, HeLa, NCI-H295R, and PC-3, as well as human healthy epithelium cell line PNT1A. Results: SiNP-NH2, SiNP-Cl, and SiNP-SH dose-dependently inhibited the proliferation of PC-3 cells with an IC50 value as 55.46 mu g/mL, 55.09 mu g/mL and 72.89 mu g/mL, respectively. SiNP-SH significantly(p<0.0001) inhibited metastasis and invasion of PC-3 cells(20.4% and 46.7%, respectively), and significantly(p<0.0001) increased early apoptosis(32.3%) when compared with non-treated cells. Protein and mRNA expressions of BcL-2, Bax, caspase-3, caspase-9, caspase-12, p53, Smad-4, Kras, and Nf-kappa B were also altered following the treatment of SiO2-NPs and its derivatives. Conclusion: Our results demonstrated that-SH functioned SiO2-NPs can prevent the proliferation of human PCa by increasing apoptosis by up-regulating gene and protein expression of p53(TP53) as well as caspase-3, caspase-9, and caspase-12 in the apoptotic pathway. Besides, the increased level of Smad-4 has also implicated the decreased cell proliferation. Hence, low sized SiNP-SH nanoparticles might be a suitable candidate for the treatment of human PCa.
Research Topics
Domains
Physical SciencesLife Sciences
Fields
Environmental ScienceEngineeringMaterials ScienceBiochemistry, Genetics and Molecular Biology
Subfields
Water Science and TechnologyElectrical and Electronic EngineeringBiomaterialsMolecular Biology
Specific Research Areas
Adsorption and biosorption for pollutant removal
Electrochemical sensors and biosensors
Electrospun Nanofibers in Biomedical Applications
Enzyme Catalysis and Immobilization
Chalcogenide Semiconductor Thin Films
Sustainable Development Goals
6CLEAN WATER AND SANITATION
4
Research Products
7AFFORDABLE AND CLEAN ENERGY
2
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
2
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
1
Research Products
3GOOD HEALTH AND WELL-BEING
1
Research Products
14LIFE BELOW WATER
1
Research Products
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Documents
0
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Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 16 |
| Muğla University | 8 |
| Selçuk University | 6 |
| Necmettin Erbakan University | 4 |
| Çanakkale Onsekiz Mart Üniversitesi | 2 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| Konya Journal of Engineering Sciences | 2 |
| Adsorption-Journal of The International Adsorption Society | 1 |
| Advanced Functional Materials | 1 |
| Anti-Cancer Agents In Medicinal Chemistry | 1 |
| Black Sea Journal of Engineering and Science | 1 |
Current Page: 1 / 4
Scholarly Output
17
Articles
16
Views / Downloads
35/16
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
142
Scopus Citation Count
162
Patents
0
Projects
1
WoS Citations per Publication
8.35
Scopus Citations per Publication
9.53
Open Access Source
9
Supervised Theses
0
Scopus Quartile Distribution
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