Enhanced methylene blue removal efficiency of TiO2 embedded porous glass


Ertus E. B. , Vakifahmetoglu C., ÖZTÜRK A.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol.41, no.2, pp.1530-1536, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jeurceramsoc.2020.09.047
  • Journal Name: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Page Numbers: pp.1530-1536
  • Keywords: Porous glass, Titanium dioxide, Leaching, Methylene blue, Photocatalysis, TITANIUM-OXIDE, PHOTOCATALYTIC ACTIVITY, VYCOR GLASS, SOL-GEL, SILICA, DEGRADATION, ADSORPTION, WATER, PHOTODEGRADATION, IMMOBILIZATION
  • Middle East Technical University Affiliated: Yes

Abstract

A porous glass (PG) embedded with titanium dioxide (TiO2) was produced via impregnation of the PG with Titanium (IV) Isopropoxide solution followed by crystallization. N-2 sorption analyses revealed that the specific surface area (SSA) and total pore volume of the PG reached to 358 m(2)/g and 0.370 cm(3)/g, respectively. The adsorption capacity of methylene blue (MB) for the glasses was measured in the dark, instead the photocatalytic MB removal efficiency was evaluated by the degradation of MB under UV light illumination using a UV-vis spectrometer. The MB removal efficiency of the TiO2 synthesized anatase powder was only 32.3 % whereas, for TiO2 embedded PG (TiPG) it was 91.6 %, and nearly complete (> 99 %) efficacy was achieved for TiO2 embedded alkaline leached PG (TiPG-AL) under UV illumination 3 h period. Better MB removal efficiency was attributed to high SSA and dispersion of nano size anatase TiO2 crystallites within the porous structure.