Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleYalnız künye2020Scopus SJRQ2The effect of graphene oxide on structural, opto-electrical and thermal properties of manganese sillenite (Bi12MnO20) nano-powders
Aydin, C.; Taskin, M.; Aydin, H.
In this study, manganese sillenite nano-powders were produced by hydrothermal method by adding graphene oxide in different mass amounts. Structural, morphological, thermal, optical and electrical properties of the obtained undoped and graphene-oxide-doped samples were investigated. XRD results showed that the produced samples had nano-sizes and the crystal sizes changed with the addition of graphene oxide. SEM and TEM images showed that the microstructures of the samples were nano-sized and composed of randomly oriented particles without orientation relationship between them. From FT-IR spectra of the samples, chemical properties and bond structures were determined. With the help of thermal analysis measurements, reactions in the sample structures at increasing temperatures, reaction temperatures, reaction energies and total mass losses were determined. The forbidden energy ranges of the samples decreased at significant rates with the addition of graphene oxide. By checking the P–E hysteresis cycles, the samples are understood to show ferroelectric properties. Dielectric measurements and temperature-dependent electrical conductivity measurements of the produced nano-powders confirmed that the samples exhibited semiconductor behaviour. The obtained results showed that manganese sillenites can be synthesised by low-temperature hydrothermal method and physical, chemical and thermal properties can be controlled by adding different amounts of graphene oxide for use in electronic and energy applications.
AtıfScopus6WoS6OpenAlex6
İncele - MakaleAçık Erişim2020Scopus SJRQ2Variation with graphene oxide doping of structural, optical, dielectric and thermal properties of BaCO3:ZnO nanocrystals synthesized by solgel combustion method
Aydin, H.; Taskin, M.; Aydin, C.; Dagdelen, F.; Kaygili, O.; Bulut, N.; Orhan, A.
The results obtained from thermogravimetric (TG) analysis, X-ray diffraction analysis, optical characterization and dielectric measurements of the samples were investigated. In X-ray diffraction patterns, the presence of both BaCO3 and ZnO peaks showed that ZnO and BaCO3 nanocrystals were independently grown. Changes in the band peak position in the FTIR spectra showed that the chemical structure of Ba:Zn nanocomposites changed with the doping of graphene oxide. The optical band gap (Eg) of the samples was calculated as 3.18, 3.19, 3.2, 3.21 and 3.23 eV for BaZn, BaZn25, BaZn50, BaZn75 and BaZn100, respectively. It was determined that the dielectric constants and dielectric losses of the nanocomposites exhibited normal dielectric behavior, decreased with the frequency described in light of Maxwell–Wagner model and increased with increasing graphene oxide concentration. TG measurement showed that the mass loss in the sample decreased with increasing graphene oxide.
AtıfScopus4WoS4OpenAlex4İncele - MakaleYalnız künye2015Scopus SJRQ1A novel type heterojunction photodiodes formed junctions of Au/LiZnSnO and LiZnSnO/p-Si in series
Aydin, H.; Tataroglu, A.; Al-Ghamdi, Ahmed A.; Yakuphanoglu, F.; El-Tantawy, Farid; Farooq, W. A.
AtıfOpenAlex57İncele - MakaleAçık Erişim2015Scopus SJRQ1Synthesis and characterization of nanostructured undoped and Sn-doped ZnO thin films via sol-gel approach
Aydin, H.; El-Nasser, H. M.; Aydin, C.; Al-Ghamdi, Ahmed. A.; Yakuphanoglu, F.
AtıfOpenAlex77İncele - MakaleYalnız künye2010Scopus SJRQ3Agar-Plate Screening for Acid Dyes Decolourization by Three Strains of Pleurotus eryngii Isolated from Tunceli, Elazig and Hakkari Province of Turkey
Yildirim, N.; Yildiz, A.; Aydin, H.
Many synthetic dyes present in industrial wastewaters are resistant to degradation by conventional treatments. In this study, the ability to decolourize two textile dyes by Pleurotus eryngii strains collected from geographically different habitats of Turkey was evaluated on agar plates For all strains, growth and decolourization halos were determined on malt extract agar plates containing 0 1 and 0.2 g/L of acid red 183 or acid green 25. Each P eryngii strain showed certain decolourization capacities and was able to decolourize both acid red 183 and acid green 25 on the malt extract agar plates, but not to the same extent Both dyes at all concentrations were found to be toxic for P eryngii growth The presence of the dyes in plates reduced the mycelial growth of all strains in comparison with the control culture growing in the medium without dyes. A positive correlation was found between the mycelial growth rate and the decolourization ability