Article
Chemistry, Physical
Irina Plesco, Vladimir Ciobanu, Tudor Braniste, Veaceslav Ursaki, Florian Rasch, Andrei Sarua, Simion Raevschi, Rainer Adelung, Joydeep Dutta, Ion Tiginyanu
Summary: A new type of photocatalyst based on a hexagonal network structure of gallium oxide has been proposed, which shows enhanced photocatalytic performance through functionalization with noble metals, demonstrating potential for environmental applications.
Article
Chemistry, Physical
Yan Wang, Lorenzo Mino, Francesco Pellegrino, Narcis Homs, Pilar Ramirez de la Piscina
Summary: Photoinduced hydrogen production is a promising green strategy for converting solar energy into chemical energy. This study successfully developed noble metal-free photocatalysts by combining different shape-controlled TiO2 nanoparticles and MoxC co-catalyst. The functional properties and efficiency of the composite materials were carefully assessed, and the engineered MoxC/TiO2 interfaces were found to be particularly active in the photocatalytic hydrogen production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Rong Wang, Jinyuan Liu, Bin Wang, Ruizhe Yang, Shumin Zhu, Yanhua Song, Yingjie Hua, Jia Yan, Ming Cheng, Hui Xu, Huaming Li
Summary: By combining a single Co atom cocatalyst with nitrogen-doped graphene, the photocatalytic activity of PDI towards BPA degradation has been enhanced. The composite photocatalyst showed significant activity due to its high photogenerated carrier migration and transfer efficiency, which effectively promoted the degradation process of BPA.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Aparna Prabha Devi, Deepak Kumar Padhi, Ashish Madhual, Pravat Manjari Mishra, Ajay Kumar Behera
Summary: A plant biomass mediated ecofriendly synthesis approach was used to design gold nanoparticles (gAuNPs) on reduced graphene oxide (RGO) using Averrhoa carambola leaf extract at room temperature. The combination of folded RGO sheets and polar biomolecules of the leaf extract helped enhance the growth inhibition effect and significantly reduce the size of gAuNPs in the nanocomposite. The synthesized compound was characterized using various techniques including XRD, TEM,STEMHAADF, Raman, FT-IR, and UV-Vis DRS spectra, revealing a size of 8±3 nm for gAuNPs on 2D-RGO sheets. The gAuNPs loaded on RGO exhibited high photocatalytic degradation rates for various pollutants under visible light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Mengwen Xu, Yanying Wang, Enna Ha, Huijuan Zhang, Chunya Li
Summary: The integration of reduced graphene oxide (rGO) with Bi4O5Br2 nanosheets enhances the adsorption and photocatalytic properties of the photocatalyst towards antibiotics under visible light irradiation. The nanocomposite containing 1.0 wt% rGO shows optimal adsorption and photocatalytic activity towards ciprofloxacin, norfloxacin, and tetracycline. Active species such as O•2-, OH•, and h+ were identified as main participants in the photodegradation system.
Article
Engineering, Environmental
Sidra Bibi, Awais Ahmad, Mohsin Ali Raza Anjum, Abdul Haleem, Muhammad Siddiq, Syed Sakhawat Shah, Abdullah Al Kahtani
Summary: The reduced graphene oxide-based iron oxide modified titania composite exhibited excellent photocatalytic performance for the degradation of malachite green and methylene blue under visible light, showing great potential for visible light-driven photocatalytic degradation processes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Yao Yao, Gangli Liao, Huina Cui, Wenbin Dong, Zhen Zhao
Summary: A novel monodispersed In2O3@ZIF-8 core-shell nanocomposites have been successfully synthesized via a simple sonochemical method. The encapsulation of In2O3 nanoparticles into ZIF-8 shell significantly extends the light response into the visible light region. The In2O3@ZIF-8-175 CSNC exhibits selectivity and ultra-high photocatalytic activity for organic dye acid fuchsin removal, benefiting from the large surface area, porous nanostructure, and synergistic effect between In2O3 and ZIF-8. This work not only provides a general synthesis route for unique core-shell heterostructures but also opens up a new pathway for high-performance photocatalysts in selective removal of other hazardous ions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Suganthi Nachimuthu, Chinnasamy Thangamani, Nathiya Thiyagarajulu, Kalaiyarasu Thangaraj, Deepak Paramasivam, Subramaniyam Thangavel, Karthik Kannan, Chelliah Parvathiraja, Vibala Bhagavathi Visalakshi, Palanivel Velmurugan, Arunachalam Chinnathambi, Sulaiman Ali Alharbi, Nagaraj Basavegowda
Summary: ZnO and ZnO-Y2O3 nanocomposites were studied for their photocatalytic degradation of Methylene blue dye, and ZnO-Y2O3 showed higher degradation efficiency and antibacterial and antioxidant activities.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Haisheng Huang, Juan Wang, Qi Kong, Yao Xu, Zhishun Wei, Ying Chang
Summary: Anatase TiO2 hierarchically structured microspheres with co-exposed {001}/{101} facets were prepared by a facile one-pot hydrothermal method. The morphology and crystallization of the microspheres were systematically investigated under different reaction temperatures, and it was found that the microspheres exhibited better properties at a temperature of 160°C. Modification of the microspheres with different noble metals (Au, Ag, Cu, Pt, Pd) resulted in significantly enhanced photocatalytic activities, with the Pt-modified sample (TPt) showing the highest activity in the degradation of tetracycline hydrochloride and hydrogen production.
Article
Environmental Sciences
Saptarshi Roy, Jnyanashree Darabdhara, Mohammed Ahmaruzzaman
Summary: In this study, an effective photocatalyst was designed by incorporating Cu-MOF with ZnO for the photocatalytic degradation of Rose Bengal. The prepared nanocomposite exhibited excellent degradation efficiency of 97.4% in 45 min under natural sunlight with a catalyst dosage of 320 mg/L. The optical, morphology, and surface characteristics of the nanocomposite were investigated using various characterization techniques.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Ceramics
Rukia Fatima, Muhammad Farooq Warsi, Muhammad Ilyas Sarwar, Imran Shakir, Philips O. Agboola, Mohamed F. Aly Aboud, Sonia Zulfiqar
Summary: A new AgO center dot CuO center dot WO3/rGO nanocomposite was designed and fabricated to study its degradation ability under visible light. The nanocomposite showed a high photocatalytic efficiency with a degradation rate of 95% for methylene blue in 40 minutes, indicating its strong potential for organic dye removal from water.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Muhammad Farooq Warsi, Khadija Chaudhary, Sonia Zulfiqar, Abdur Rahman, Ibrahim A. Al Safari, Hafiz Muhammad Zeeshan, Philips O. Agboola, Muhammad Shahid, Muhammad Suleman
Summary: In this study, visible-light-active binary metal doped Mn0.9Cu0.05Ag0.05O2 nanostructures were synthesized and found to exhibit improved visible light activity and prolonged separation of photoinduced carriers. The binary metal doping not only influenced the crystal structure of MnO2, but also led to enhanced antibacterial and photocatalytic performance.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Husn Ara Chauhan, Mohd Rafatullah, Khozema Ahmed Ali, Mohammad Faisal Umar, Moonis Ali Khan, Byong-Hun Jeon
Summary: Environmental concerns have been raised due to the persistence and carcinogenicity of polycyclic aromatic hydrocarbons (PAHs). This study successfully developed a nanocomposite photocatalyst based on graphene oxide (GO) and zinc oxide (ZnO) using the doping approach. The GO/ZnO nanocomposite showed excellent ability in degrading phenanthrene under UV-Visible light exposure, making it a versatile option for wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Vrinda S. Punnakkal, E. Anila
Summary: In this study, a simple chemical synthesis method was used to prepare polypyrrole/silver/graphene (Ppy/Ag/Gr) ternary nanocomposites with varying concentrations of graphene. The interaction between polypyrrole, silver, and graphene was studied using XRD, FTIR, and UV-Vis spectroscopies. The results showed that the addition of the optimum concentration of graphene into Ppy/Ag enhanced its photocatalytic property. Furthermore, it was confirmed that the enhancement of photocatalysis in the Ppy/Ag/Gr sample was due to the increased surface area.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Margaux Desseigne, Veronique Madigou, Marie-Vanessa Coulet, Olivier Heintz, Virginie Chevallier, Madjid Arab
Summary: This study investigated the loading of gold nanoparticles onto a tungsten trioxide support using a simple deposition technique and evaluated its efficiency and pathway for catalytic degradation of dye pollutants.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Mechanical
Fatih Turan, Mehmet Guclu, Koray Gurkan, Ali Durmus, Yener Taskin
Summary: This study investigates the effects of compositional variations and processing parameters on the properties of epoxy-based composites filled with carbon nanomaterials. The study found that the percolation threshold of carbon nanotubes (CNT) was 0.1 wt% and high power ultrasonication had a detrimental effect on the electrical and flexural properties. Increasing resin viscosity resulted in higher void content, which negatively affected the mechanical and viscoelastic properties.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Chemistry, Applied
Isil Gazioglu, Ozge Sultan Zengin, Aysenur Gunaydin Akyildiz, Belma Zengin Kurt
Summary: In this study, the biotransformation of carvone and camphor by Aspergillus flavus was investigated and the resulting products were analyzed. It was observed that the biotransformation products exhibited cytotoxicity against breast cancer cells and significant inhibition against aflatoxin B1.
NATURAL PRODUCT RESEARCH
(2023)
Article
Materials Science, Ceramics
Zehra Durmus, Roberto Koeferstein, Titus Lindenberg, Florian Lehmann, Dariush Hinderberger, A. Wouter Maijenburg
Summary: In this study, hybrid structures were constructed between Ce-based metal-organic framework (Ce-MOF) and graphitic carbon nitride (g-C3N4) using g-C3N4 materials prepared by five different methods. The structural properties were characterized using SEM, XRD, FTIR, TGA-DTG, UV-vis DRS, and BET. The photocatalytic performance of the composites was evaluated by the degradation of methylene blue (MB) under UV-visible light irradiation, and the Ce-MOF/g-C3N4-TS composite showed significantly higher efficiency compared to Ce-MOF or g-C3N4.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Halit Muglu, Fatih Sonmez, M. Serdar Cavus, Belma Z. Kurt, Hasan Yakan
Summary: This study reports the synthesis, spectroscopic elucidation, and investigation of antioxidant properties of new Schiff bases based on isatin and (thio)/carbohydrazone derivatives. The structures of the synthesized compounds were determined by FT-IR, H-1-NMR, and C-13-NMR spectroscopic methods and elemental analysis. Their antioxidant activities were evaluated using DPPH, ABTS, and CUPRAC assays. Most of the synthesized compounds showed antioxidant activities, with compound 3 exhibiting the strongest activity. Thiocarbohydrazone compounds exhibited higher antioxidant activity than carbohydrazones. The results of electron donating ability and single electron transfer enthalpy calculations suggested that thiocarbohydrazone compounds could perform SET reactions more easily than carbohydrazones.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Multidisciplinary
Belma Zengin Kurt, Gulsen Celebi, Dilek Ozturk Civelek, Atilla Akdemir, Andrea Angeli, Fatih Sonmez, Claudiu T. Supuran
Summary: In this study, sixty novel coumarin-monoterpene compounds were synthesized and evaluated for their inhibitory effects on hCA isoforms and anticancer potentials. All synthesized molecules selectively inhibited CA IX and XII, with compounds 23 and 42 showing the strongest inhibitory activity against hCA IX. Cytotoxicity evaluation revealed that compounds 14 and 63 exhibited the highest cytotoxicity on MCF-7 cells, while compound 23 showed the strongest cytotoxic effect on both PC-3 and HT-29 cell lines. Furthermore, compounds 14, 23, and 66 showed a reduction in CA IX and CA XII protein expression and increased apoptosis in different cell lines. The modeling studies demonstrated that only the open coumarin form of the compounds could interact directly with the active-site Zn2+ ion.
Article
Chemistry, Applied
Ozgen Ozge, Davut Avci, Fatih Sonmez, Oemer Tamer, Necmi Dege, Adil Basoglu, Yusuf Atalay, Belma Zengin Kurt
Summary: Diabetes is a rapidly growing global health crisis, and one therapeutic approach involves inhibiting carbohydrate hydrolyzing enzymes like α-glucosidase. New Schiff base complexes have been synthesized to investigate their potential as α-glucosidase inhibitors.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
O. Polat, F. M. Coskun, Y. Yildirim, D. Sobola, M. Ercelik, M. Arikan, M. Coskun, C. Sen, Z. Durmus, Y. Caglar, M. Caglar, A. Turut
Summary: In this study, we investigated the effect of Ir substitution into Fe sites on the band gap of LuFeO3 material. LFO and Ir-doped LFO (LuFe1-xIrxO3 or LFIO for short, where x = 0.05 and 0.10) thin films were synthesized using magnetron sputtering techniques. The crystallographic orientation and surface topography of the films were examined using X-ray diffraction (XRD) analysis and atomic force microscopy (AFM), respectively. Photoluminescence (PL) spectroscopy was used to study the recombination of photogenerated electron-hole pairs, while Raman spectroscopy provided information on crystal symmetry and defects in the oxide materials. It was found that the LFO band gap could be changed from 2.35 to 2.72 eV by Ir substitution into Fe sites. In addition, diffuse reflectance spectroscopy (DRS) was employed to analyze various optical properties of the materials.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
M. Coskun, Ozgur Polat, Y. Yildirim, Z. Durmus, C. Sen, Y. Caglar, M. Caglar, A. Turut
Summary: LuFe1-xOsxO3 (x = 0, 0.05, and 0.10) compounds were synthesized and their resistivity, impedance, and frequency-dependent loss tangent were investigated at different temperatures. Impedance and resistivity increased with the doping procedure, while activation and loss tangent values decreased. X-ray photoelectron spectroscopy (XPS) revealed the oxidation state of Lu and peaks for lattice oxygen and oxygen vacancy. Scanning electron microscopy (SEM) images showed particle agglomeration and void formation. Single and double oxygen vacancies and ion hopping were responsible for the reported activation energies. The compounds exhibited a low loss factor even at high temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Composites
Fatih Turan, Mehmet Guclu, Koray Gurkan, Ali Durmus, Yener Taskin
Summary: This study investigates the CNT penetration phenomenon in the VI process by measuring electrical conductivity. The effects of resin temperature, CNT content, and processing technique on composite laminate quality were examined by monitoring electrical properties. Composites with various CNT contents were also manufactured using compression moulding and vacuum bagging for comparison. Results showed that electrical conductivity measurement was an effective tool for assessing CNT penetration in VI. Higher CNT contents led to resistive and capacitive behavior, but increasing the epoxy/CNT temperature improved CNT penetration.
PLASTICS RUBBER AND COMPOSITES
(2023)
Article
Materials Science, Composites
Fatih Turan, Koray Gurkan, Mehmet Guclu, Ali Durmus, Yener Taskin
Summary: A statistical approach was developed to predict fatigue failure of laminated composite leaf springs filled with carbon nanotube (CNT) and woven glass fibers. In-situ monitoring of damage during fatigue tests and the Weibull analysis were used. The critical electrical resistance change to cyclic fatigue was found to be 0.15% with 95% reliability. This statistical concept can be a useful tool for predicting safety limits of composite structures in the aerospace industry.
POLYMER COMPOSITES
(2023)
Article
Biochemistry & Molecular Biology
Belma Zengin Kurt, Ozlem Altundag, Merve Nur Tokgoz, Dilek Ozturk Civelek, Fulya Oz Tuncay, Ummuhan Cakmak, Yakup Kolcuoglu, Atilla Akdemir, Fatih Sonmez
Summary: Fifteen novel flurbiprofen urea derivatives containing the thiadiazole ring were synthesized and tested for their inhibition effects on tyrosinase. Compound 3c was found to be the most potent inhibitor with an IC50 value of 68.0 μM. The synthesized compounds were also evaluated for their cytotoxic effects on different cancer cell lines, and 3l showed the highest cytotoxicity on HT-29 cells, 3o exhibited the strongest cytotoxic effect on HepG2 cells, and 3j strongly affected B16F10 cells.
CHEMICAL BIOLOGY & DRUG DESIGN
(2023)
Article
Chemistry, Physical
O. Polat, M. Coskun, Y. Yildirim, P. Roupcova, D. Sobola, C. Sen, Z. Durmus, M. Caglar, A. Turut
Summary: Due to its electrical, magnetic, and optical characteristics, LuFeO3 (LFO) has garnered interest from the scientific community. This study prepared powders of LFO, LuFe0.95Co0.05O3, and LuFe0.90Co0.10O3 samples using the solid-state approach. Characterization techniques such as XRD, SEM, and XPS were employed to analyze the samples' crystalline structure, particle size, and oxidation states of Fe and Co. The undoped LFO sample exhibited higher conductivity and dielectric constant compared to the Co-doped LFO samples. Magnetic experiments using VSM showed that Co doping increased the Mr values, which could be attributed to variations in the inclined angles of Fe3+ moments and the growth of magnetocrystalline anisotropy's energy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Nevra Ercan, Ali Durmus, Ahmet Kasgoz
Summary: Two different thermoplastic polyurethanes (TPUs), TPU1 and TPU2, blended with a cyclic olefin copolymer (COC) elastomer to prepare TPU-rich blend films. The blend films were characterized using various tests and analysis methods, revealing the morphological features and viscoelastic properties. The addition of COC elastomer significantly improved the melt viscosity, melt elasticity, and creep strength of TPUs.
POLYMER ENGINEERING AND SCIENCE
(2023)
Proceedings Paper
Polymer Science
Emre Vatansever, Dogan Arslan, Deniz Sema Sarul, Ali Durmus, Mohammadreza Nofar
Summary: The dispersion of cellulose nanocrystals (CNC) within polybutylene adipate terephthalate (PBAT) was investigated in this study. PBAT/CNC nanocomposites with different CNC contents were prepared through solution casting and dilution of a solution casted masterbatch using a twin screw extruder. The efficiency of the two preparation approaches on CNC dispersion was evaluated through transmission electron microscopy and rheological analysis. The results showed that solution casted PBAT/CNC nanocomposites had better CNC dispersion compared to their melt processed counterparts, while the diluted melt processed cases also exhibited good CNC dispersion. As a result, CNC was able to form a percolation network within PBAT at CNC contents of around 2 and 4 wt% in the two approaches, respectively.
PROCEEDINGS OF THE 36TH CONFERENCE OF THE POLYMER PROCESSING SOCIETY, PPS36
(2023)
Article
Green & Sustainable Science & Technology
Deniz Sema Sarul, Dogan Arslan, Emre Vatansever, Yusuf Kahraman, Ali Durmus, Reza Salehiyan, Mohammadreza Nofar
Summary: Polylactide/poly (butylene adipate-co-terephthalate) blend nanocomposites with cellulose nanocrystals were prepared by melt compounding method. The dispersion and localization of CNC and the properties of the blend nanocomposites were affected by different preparation methods. The addition of CNC improved the rheological properties, thermal properties, and elastic modulus of the blends, but the expected improvements in mechanical properties did not occur due to possible residual solvent.
JOURNAL OF RENEWABLE MATERIALS
(2022)
