Zeolit Üzerine Desteklenmiş Fe Katkılı TiO2 üzerinde İndigo Boyasının Fotobozunmasının Araştırılması

Öz

Çevre kirliliği ve yenilenebilir enerji üretimi gibi fotokatalitik uygulamalarda yüksek etkinliği nedeniyle, titanyum dioksit (TiO2), katkılı/katkısız fotokatalizör malzeme olarak kullanım yaygınlığı ile öne çıkmaktadır. Uygulama ortamında homojenliği ve kontrollü dağılımı sağlayabilmek adına boşluk boyutu elverişli olan bir zeolit mineraline emdirilmesiyle TiO2 ve katkı malzemesinin faz dağılımı hassas bir şekilde kontrol edilebilmektedir. Bu nedenle bu çalışma zeolit mineralinin içinde ki demir (Fe) katkılı TiO2’nın indigo boyasında ki fotokatalitik özelliklerinin tayinini içermektedir. Bu nedenle Fe katkılı TiO2’in zeolit’e emdirilmesiyle elde edilen nanotozlardan sol-jel tekniği kullanılarak viskoz bir çözelti elde edilmiştir. Hazırlanan kompozitlerin yapısı X-ışını difraksiyonu (XRD) ve taramalı elektron mikroskobu (SEM) ile karakterize edilmiştir. TiO2’in ışığı soğurma aralığının Fe katkısı ve zeolit’e emdirilmesi ile görünür ışık bölgesine genişletilebileceği UV-Vis Spektrofotometre çalışmaları ile belirlenmiştir. Hazırlanan tozların görünür ışık fotokatalitik aktiviteleri indigo boyansının bozunma çalışmaları ile saptanmıştır. TiO2, zeolit ve TiO2/zeolit nanotozları ile karşılaştırıldığında Fe katkılı-TiO2/zeolit nanotozlarının en yüksek fotokatalitik aktiviteye sahip olduğu gösterilmiştir. Çalışma sonucunda Fe katkılı TiO2’nun zeolitin yapısına emdirilmesi ile TiO2 nanotozunun optik özeliklerinin optimize edilebildiği anlaşılmıştır.

Anahtar Kelimeler

• zeolit
• demir
• tio2
• fotokatalizör
• indigo

Investigation of Photodegradation of Indıgo Dye on Fe Doped TiO2 Supported with Zeolite

Öz

Due to its high efficiency in photocatalytic applications such as environmental pollution and renewable energy production, titanium dioxide (TiO2) stands out with its widespread use as a doped / undoped photocatalyst material. In order to ensure homogeneity and controlled distribution in the application environment, the phase distribution of the TiO2 and the additive material can be precisely controlled with the support of the zeolite A mineral whose gap size is suitable. TiO2 supported zeolite photocatalysts loaded with Fe ions prepared by sol-gel method and it was aimed to investigate the effects of photocatalytic activity under visible light on indigo dye. Therefore, this study includes the determination of photocatalytic properties of zeolite / iron (Fe) doped TiO2 in indigo dye. Using the sol-gel technique, a viscous solution was obtained from the nanopowder obtained. The structures of prepared composites were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). It has been determined by UV-Vis Spectrophotometer studies that the light absorption range of TiO2 can be extended to the visible light region with Fe contribution and zeolite support. Visible light photocatalytic activities of the prepared powders were determined by the degradation studies of the indigo dye. Compared to TiO2, zeolite and TiO2 / zeolite nanopowder, Fe doped-TiO2/zeolite nanopowder has 99% degradation after 120 hours and has the highest photocatalytic activity. As a result of the study, it was understood that the optical properties of TiO2 nanopowder could be optimized with the support of Fe doped TiO2 and zeolite. 

Anahtar Kelimeler

• Zeolite
• Iron
• TiO2
• Photocatalyst
• Indıgo dye

Kaynakça

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