Comparison of MIL-101(Fe) and amine-functionalized MIL-101(Fe) as photocatalysts for the removal of imidacloprid in aqueous solution
Gözmen, Belgin | Geçgel, Cihan | Turabik, Meral
One of the attractive iron-based metal organic framework (MOF) MIL-101(Fe) (Material Institute Lavoisier, MIL) and amine-functionalized NH2-MIL-101(Fe) materials were synthesized by conventional solvothermal method and characterized by TGA (Thermo Gravimetric Analysis), SEM (Scanning Electron Microscopy), XRD (X-Ray Diffractograms), BET (Braunner Emmet Teller) and FTIR (Fourier Transform Infrared Spectroscopy). Characterization results indicated that MIL101(Fe) materials have well defined morphology, good thermal stability, high surface area and also high porosity. These MOF materials were used as photocatalysts for photodegradation of a pesticide, imidacloprid (IMC). The response surface methodology (RSM) was applied in designing the IMC photodegradation experiments for evaluating the...
Bisfenol A'nın grafen oksit ve grafitik karbonnitrür kompozit fotokatalizörleri ile oksidasyonunun incelenmesi
Yakar, Ezgi
Bu çalışmada, çevresel sularda tespit edilen damacana, biberon, oyuncak, vb. gibi çok sayıda plastik yapının üretiminde kullanılan endokrin yıkıcı Bisfenol A bileşiğinin fotokatalitik, sonokatalitik ve kombine sono-fotokatalitik oksidasyonu gerçekleştirildi. Sono-fotokatalitik oksidasyon sisteminde kullanılmak üzere CoFe2O4, GO-TiO2, GO-CoFe2O4, g-C3N4-TiO2 ve g-C3N4-CoFe2O4 heterojen katalizörler farklı yöntemlerle sentezlenerek, FT-IR, SEM-EDS XRD analizleri ile karakterizasyonları gerçekleştirildi. Ultrasonik sistem (US), UV-vis ışın kaynağı, oksidan ve katalizörlerin tek başına BPA gideriminde etkili olmadığı ancak sono-fotokatalitik oksidasyonun (US/UV/Oksidan/Katalizör) BPA bozunma ve mineralizasyonunda etkili bir yöntem olduğu belirlendi. Oksidan olarak hidrojenperoksit ve persülfat...
Impact of graphitic carbon nitrides synthesized from different precursors on Schottky junction characteristics
Altan, Orhan
Graphitic carbon nitride (g-CN) has gained wide interest in many areas, such as energy and the environmental remediation as a layered polymeric semiconductor that allows the formation of catalytically active Schottky junctions due to its proper electronic band structure. Interestingly, although it is known that the precursors used in the synthesis, can influence the properties of the g-CN, no detailed study on these effects on Schottky junctions could be found in the literature. In this research, the effects of g-CNs synthesized by thermal polycondensation of different precursors on the photocatalytic efficiency of Schottky junctions were investigated. For this purpose, urea, thiourea, melamine, and guanidine hydrochloride were used as different precursors, while the photocatalytic dehydro...