Multi-Cycle Photodegradation of Anionic and Cationic Dyes by New TiO₂/DSAT Immobilization System

Abstract:

In this work, titanium dioxide (TiO₂) photocatalyst was generally immobilized onto glass plate support material by employing double sided adhesive tape (DSAT) as a thin layer binder. The photocatalytic performance of this new non-additive immobilization system was observed under the degradation of two different charges of dyes namely anionic reactive red 4 (RR4) and cationic methylene blue (MB) dyes. Photocatalytic degradation of RR4 and MB dyes under immobilized TiO₂/DSAT were compared with TiO₂ in suspension mode respectively. Immobilized TiO₂/DSAT was observed to have up to 30 cycles of reusability thanks to DSAT that is able to provide a very strong intact between the glass plate and TiO₂ layers. In fact, a better photodegradation activity was observed by number of photocatalysis cycles due to increasing pores formation on TiO₂ surface as observed by Scanning Electron Microscopy (SEM) analysis.

• Periodical: Applied Mechanics and Materials (Volume 835)
• Pages: 353-358
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.835.353
• Online since: May 2016
• Authors: Wan Izhan Nawawi, S.K. Ain, Nur Raihan Zaharudin, Sudirman Sahid
• Keywords: Immobilization, Methylene Blue, Photocatalysis, Reactive Red 4, TiO₂

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