Abstract
A new immobilized TiO2technique was prepared by coating TiO2solution onto double-sided adhesive tape (DSAT) as a thin layer binder without adding any organic additives. Glass plate was used as support material to immobilized TiO2/DSAT. Two different charges of dyes were applied, namely, anionic reactive red 4 (RR4) and cationic methylene blue (MB) dyes. Photocatalytic degradation of RR4 and MB dyes was observed under immobilized TiO2/DSAT with the degradation rate slightly lower and higher, respectively, compared with TiO2in suspension mode. It was observed that DSAT is able to provide a very strong intact between glass and TiO2layers thus making the reusability of immobilized TiO2/DSAT be up to 30 cycles. In fact, a better photodegradation activity was observed by number of cycles due to increasing formation of pores on TiO2surface observed by SEM analysis.
Highlights
Advanced oxidation processes (AOPs) are one of the promising ways to eliminate dangerous pollutants into harmless treated products
In case of immobilized TiO2/double-sided adhesive tape (DSAT) sample, the surface area is less compared with suspension; the sample is more stable due to static condition, making the balance between adsorption and photocatalysis processes for enhanced photodegradation of methylene blue (MB)
It was observed that the photocatalytic degradation rate of immobilized TiO2/DSAT is getting increased under reactive red 4 (RR4) as well as MB dye after 20 times of cycles
Summary
Advanced oxidation processes (AOPs) are one of the promising ways to eliminate dangerous pollutants into harmless treated products. Due to its small particles, they stay suspended in water, clogging filter membranes, and penetrate through porous filter materials [2] Realizing this issue, TiO2 immobilized techniques are implemented onto the support materials such as glass, silica gel, and metals. Polymer added in TiO2 composite which acts as a binder induces a strong intact among the immobilized TiO2 matrix making it reusable over times. The lower the amount of polymer mixing ratio is, the better the performance of photocatalytic process will be observed, but it makes TiO2 leach out . Since commercial DSAT is water proof, durable, and strong intact with any materials and is made from nonhazardous substances [16], it is highly potential to be used as a thin layer binder for TiO2 immobilized system. The photocatalytic activity of the immobilized photocatalyst was investigated by monitoring the degradation of RR4 and MB dyes as well as their durability and reusability
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