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Öğe Achieving Sustainable Wood Preservation Using Nanomaterials(Düzce Üniversitesi, 2024) Ramazanoğlu, DoğuIn this study, a cost-effective and energy-efficient approach was used to impregnate the surface of solid wood with three different nanoparticle solutions and a hydrophobic polymer solution for wood protection. Impregnation of Ch, ZnO and SnO2 nanoparticles increased the thermal stability of lignocellulosic materials, resulting in weight losses of 75.7-80.5% between 339-387°C. The binding of nanoparticles through impregnation also increased the water uptake rate, while silanization with HP increased hydrophobicity by 22.9-26.2%. The resulting wood was evaluated in terms of durability and performance as well as water and fire resistance, and it was predicted that it could be a sustainable approach to minimize the effects of adverse weather conditions on wood materials while reducing negative impacts on the environment and human health.Öğe Aubergine-based Biosorbents for Heavy Metal Extraction(Bayburt Üniversitesi, 2022) Ramazanoğlu, Doğu; Mohammed, Zaman Adnan; Khalo, Idrees; Maher, KhalidIn this study, an alternative inexpensive and eco-friendly Aubergine (Eggplant)-based biosorbents were synthesized for removing Cu2+, Ni2+, and Co2+ heavy metal ions from the aquatic region. Moreover, how the physical properties and water treatment performance were affected by their corn starch and oil contents were investigated. Their extraction capacity was evaluated by performing Flame atomic absorption spectroscopy (FAAS). ASTM D 792 standard was complied with to calculate biosorbent density. Indeed, the untreated eggplant stalk-based biosorbent adsorbed 5.36 mg of Co2+ ions and 4.99 mg of Ni2+ ions, and 4.84 mg of Cu2+ ions from 25 mL of initial solution that contained 7.00 ppm of each ion for 30 minutes, at room temperature with 175 rpm agitation speed by Eggplant-based biosorbents.Öğe Dielectric property enhancement of glass fiber-reinforced concrete via TiO? nanocomposites(Elsevier, 2025) Ramazanoğlu, Doğu; Subaşı, Azime; Musatat, Ahmad Badreddin; Demir, Ahmet; Subaşı, Serkan; Maraşlı, MuhammedThis study addresses the critical gap in traditional glass fiber-reinforced concrete (GFRC), which lacks tailored electrical properties for modern energy-related applications. We introduce a novel approach by incorporating a TiO?-based hybrid composite (TiO?-@) into GFRC to develop multifunctional composites with enhanced dielectric, mechanical, and energy storage capabilities. Experimental results demonstrate that TiO?-@ doping at 2 % concentration achieves the most significant improvements: a dielectric constant increase to ~420 at 100 Hz (compared to ~180 for undoped GFRC), capacitance enhancement to 71 pF at 100 Hz (versus 18 pF in the reference), and AC conductivity elevation by 205 % after aging. The 2 % TiO?-@ sample also exhibited a Leeb hardness increase to 486 HLD (from 159 HLD pre-aging), highlighting its structural robustness. Frequencydependent analyses revealed modified polarization mechanisms and charge transport dynamics, with ColeCole plots and impedance spectroscopy confirming reduced capacitive reactance and enhanced interfacial interactions. These results establish TiO?-@ as a transformative additive for GFRC, bridging the gap between structural performance and energy functionality. The work pioneers the integration of TiO? nanocomposites into cementitious matrices, offering a dual-purpose material for smart construction systems and embedded energy storage devices.Öğe Experimental investigation of mechanical and physical properties of glass fiber reinforced concretes produced with different magnetized waters(Yıldız Teknik Üniversitesi, 2024) Subaşı, Serkan; Ramazanoğlu, Doğu; Maraşlı, Muhammed; Ozdal, Volkan; Hatipoğlu, Yasemin; Dehghanpour, HeydarMagnetized water may act as a thickener in cementitious mixtures due to its slippery effect. Therefore, it can be beneficial for the mixture to settle easily and to improve its strength. This study investigated the effects of magnetized water passing through pipes with magnetic field intensity (MFI) 8 and 10 on glass fiber reinforced concrete (GFRC). Three different mixtures, the GFRC mixture produced with regular tap water, were obtained, and the properties of the produced GFRC samples, such as 7, 14, and 28 days H-Leeb hardness, density, Ultrasonic pulse velocity (UPV), flexural strength, compressive strength, and fracture mechanics were investigated. In addition, SEM, EDS, FTIR, and TGA analyses were carried out to investigate the change in surface tension in the internal structures of GFRCs produced with magnetized water. Overall, the results were promising. Results showed a proportional H-Leep hardness increase with curing time and density variations. Magnetized water reduced air voids, enhancing sound transmission speeds. Flexural and compressive strength improved with magnetic water. The study suggests significant contributions to energy savings and reduced production costs, highlighting the efficient use of energy resources.Öğe Farklı Biyokütlelerden Aktif Karbon Sentezi(Şırnak Üniversitesi, 2023) Ramazanoğlu, Doğu; Mohammed, Zaman Adnan; Abdulqadr, Samira; Maher, KhalidAktif karbonlar, enerji depolama sektöründen su ve hava temizleme sistemlerine kadar pek çok önemli alanda, geniş kullanım alanına sahiptirler. Bu çalışmada, aktif karbonların, patlıcan (Solanum melongena) sapı, Muz (Musa sapientum) ve Portakal (Citrus sinensis) kabukları olmak üzere 3 farklı biyokütleden sentezlenebilirliği araştırılmıştır. Sentez için 2 saat boyunca 1200 °C'de karbonizasyonu gerçekleştirilen biyokütleler, 24 saat süreyle 4N Sülfürik asit (H2SO4) ile aktive edilmiştir. Son olarak, elde edilen bu aktif karbonlar Endonezya Ulusal Standart ölçümü sistemi olan SNI 06-3730-1995.5'e (maksimum su içeriği %15, maksimum kül içeriği %10, maksimum buhar içeriği %25 ve minimum bağlı karbon içeriği %60) göre değerlendirilmiştir. Yapılan bu çalışma sonucunda, patlıcan sapı, muz ve portakal kabuğunun su içeriği % 13.8, % 21.9 ve % 19.3; Kül içeriği %6,50, %8,50 ve %22,4; Buhar içeriği %15,5, %26,2 ve %22.8; Bağlı karbon içeriği %78.0, %65.3 ve %54.8 bulunmuştur. Sonuç olarak, Bu biyokütleler arasında, patlıcan sapının aktif karbon üretimi için en uygun kaynak olduğu tespit edilmiştir.Öğe Multifunctional SnO2-@ doped glass fiber?reinforced concrete: Improved microstructure, mechanical, dielectric, and energy storage characteristics(Elsevier, 2025) Ramazanoğlu, Doğu; Subaşı, Azime; Musatat, Ahmad Badreddin; Demir, Ahmet; Subaşı, Serkan; Maraşlı, MuhammedThis study explores SnO?-based hybrid composite (SnO?-@) doped glass fiber-reinforced concrete (GFRC) for enhanced dielectric, energy storage, and mechanical performance. Microstructural analysis confirmed SnO?-@ promotes ettringite and calcium silicate hydrate (C-S-H) formation, improving matrix integrity. Aged samples exhibited a 650?% increase in surface roughness (Ra) and over 200?% higher Leeb hardness, demonstrating durability. Dielectric spectroscopy revealed frequency-dependent tunability: 1?% SnO?-@ achieved a peak dielectric constant (?' = 130 at 10?kHz), shifting to ?' =?140 at 100?kHz for 2–3?% doping. AC conductivity surged by 60?%, correlating with SnO?-@-induced interfacial polarization and charge mobility. Energy storage capacity improved significantly, attributed to optimized dipole alignment and reduced leakage currents. Color stability remained robust (?E* ? 2.8 post-aging), ensuring aesthetic viability. These results position SnO?-@-doped GFRC as a multifunctional material for smart infrastructure, integrating structural resilience, adaptive dielectric properties, and energy storage potential for next-generation urban applications.Öğe Valorizing Agricultural Waste: Synthesis of Pomegranate Peel-Derived Activated Carbon-Based Hybrid Composite for Sustainable Heavy Metal Removal(Atatürk Üniversitesi, 2023) Khalo, Idrees; Ramazanoğlu, DoğuThe effective removal of heavy metals from water sources is of paramount importance due to their detrimental effects on the environment and human health. In this study, we present a sustainable approach to address this issue by valorizing agricultural waste in the form of pomegranate peel for the synthesis of an activated carbon-based hybrid composite. The pomegranate peel-derived activated carbon exhibited high removal capacities for Pb2+ and Ca2+ ions, with maximum elimination achieved at pH 7 within a pH range of 3 to 11. The adsorption process reached equilibrium in 30 minutes, resulting in remarkable removal efficiencies of 80.3% for Pb2+ and 74.3% for Cd2+. These findings highlight the successful synthesis and characterization of pomegranate peel-derived activated carbon as a promising and environmentally friendly solution for the sustainable removal of heavy metals, emphasizing the significance of agricultural waste valorization in mitigating water contamination.
