2,4 Diklorofenoksiasetik asitin fotokatalitik degredasyonu için titanyum dioksit üretim prosesinin optimizasyonu

Yıl 2024, , 233 - 242, 21.08.2023

Dilek Duranoğlu , Yeliz Yılmaz

https://doi.org/10.17341/gazimmfd.1162306

Öz

Bu çalışmada sol-jel yöntemi ile üretilen titanyum dioksit (TiO2) fotokatalizörü ile, yaygın olarak kullanılan 2,4 Diklorofenoksiasetik asit (2,4D) pestisitinin fotokatalitik bozunumu incelenmiştir. Optimum TiO2 sentezi için seçilen üç farklı parametrenin (Titanyum isopropoksit (TIP) miktarı, HNO3 konsantrasyonu ve yaşlandırma süresi) etkileri Box-Behnken deneysel tasarım metodu ile incelenmiş ve modellenmiştir. Farklı şartlarda üretilen TiO2 fotokaalizörleri ile 2,4D’in fotokatalitik bozunma hızları incelenerek, fotokatalizör üretim prosesi optimize edilmiştir. Belirlenen optimum şartlarda üretilen TiO2 numuneleri XRD, SEM, zeta potansiyeli ve boyut analizi ile karakterize edilmiş, ayrıca ticari Degussa P25 TiO2 fotokatalizörü ile kıyaslanmıştır. 2,4 D’in fotokatalitik bozunma hızı belirlenen optimum koşul 1 (TIP miktarı: 24,08mL, HNO3 konsantrasyonu: 3,53 M ve yaşlandırma süresi:2,29 saat) ve optimum koşul 2 (TIP miktarı:10,33mL, HNO3 konsantrasyonu: 0 M ve yaşlandırma süresi:19,51 saat) için sırasıyla 0,0084 ve 0,0085 dak-1 olarak belirlenmiştir. TiO2 üretim parametrelerinin deneysel tasarım kullanılarak optimize edilmesi ile asit miktarı kullanımı sıfıra ya da yaşlandırma süresi en aza indirilebilmiş ve oldukça yüksek fotokatalitik etkinlik elde edilmiştir.

Anahtar Kelimeler

Fotokatalitik bozunma, 2,4 Diklorofenoksiasetik asit, titanyum dioksit, Box-Behnken Deneysel Tasarım, optimizasyon

Destekleyen Kurum

Yıldız Teknik Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü

Proje Numarası

2016-07-01-YL07

Kaynakça

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