Methylene Blue Degradation on Praseodymium-Doped Titanium Dioxide Photocatalyst

Dogu D., KARAKAŞ G.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.35, sa.2, ss.859-869, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Sayı: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.17341/gazimmfd.549084
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Art Source, Compendex, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.859-869
  • Anahtar Kelimeler: Titanium dioxide, praseodymium, photocatalysis, methylene blue, dimerization, VISIBLE-LIGHT PHOTOCATALYSIS, UP-CONVERSION, HYDROTHERMAL PREPARATION, ENHANCED PERFORMANCE, HOT-ELECTRONS, TIO2 FILMS, SIZED TIO2, ANATASE, PR, MECHANISMS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this study, the effects of the praseodymium doping and calcination temperature for titania based catalysts synthesized using a sol-gel method on the photocatalytic methylene blue degradation reaction were investigated. Doping TiO2 with 1% Pr stabilizes the anatase crystal structure by inhibiting anatase to rutile transformation, increases surface area, and light absorption capability [1]. Besides the Pr doping, effect of calcination temperature on the methylene blue degradation was investigated both with powder and thin-film catalysts. Experimental results showed that catalysts calcined at 600 degrees C had higher photocatalytic activity than the ones calcined at 500 degrees C. Moreover, Pr doping was also observed to enhance the photocatalytic performance of powder samples, and complete conversion of methylene blue was achieved over the praseodymium doped titania powder catalysts. Dimerization of methylene blue molecules also effects the degradation rates and it was observed that dimer to monomer transition is faster on Pr doped catalysts.