Degradation of Rhodamine B Dye by TiO₂Nanotubes Photocatalyst Synthesized via Alkaline Hydrothermal Method

Abstract

Abstract. Titanium dioxide (TiO2) nanotubes have successfully been synthesized by using one step approach of hydrothermal method. Commercial TiO 2 (anatase) powder was used as precursor to synthesize the TiO2 nanotubes. The TiO 2 nanotubes were synthesized at 120 o C/20 hrs in an alkaline solution of NaOH. The photocatalytic study of the as-synthesized samples was conducted by analyzing the degradation of Rhodamine B (Rh B) dye under UV light irradiation. Rh B is a toxic dye which is commonly used in textile industry. It is the one of the most common pollutants in the effluents and highly soluble in water. A comparison study was carried out in order to investigate the photocatalytic activity between the synthesized TiO 2 nanotubes and the commercial TiO2 nanoparticles. Results show that the TiO 2 nanotubes exhibits better photocatalytic activity in the degradation of Rh B as compared to the TiO2 nanoparticles.

Influence of Mg, Cu, and Ni Dopants on Amorphous TiO2 Thin Films Photocatalytic Activity

“…To maximize the efficiency of the photocatalysis process, a transparent solution must be chosen. There are many types of research where methylene blue (MB) [49,50], rhodamine B (RhB), [51,52] or other organic dyes were selected as a solution for this process. In that case, the light absorption of the solution itself and the degradation process happening without the photocatalyst should be considered as an extraneous effect, which could cause slightly inaccurate results of the semiconductor as a photocatalyst [53][54][55].…”

Investigating photocatalytic property of TiO2 nanorods fabricated hydrothermally at equal molar ratio of KOH and NaOH

“…Crystalline phases present in titanium dioxide nanostructures are formed depending on the applied calcination temperature. Generally, these phases include anatase, rutile, brookite and TiO 2 (B) . The rutile phase has been introduced as the most stable phase and anatase and brookite phases have been known as metastable phases.…”

“…Among the above‐mentioned TiO 2 polymorphs, the anatase phase despite its higher energy gap exhibits the strongest photocatalytic property and this may be due to its high electrical conductivity and electron mobility relative to the other phases . The anatase phase is formed through calcining amorphous phase at a temperature of more than 400°C; it also converts into the rutile phase at temperatures above 600°C; however, the anatase phase prepared at the calcination temperature of 650°C remains as a stable phase .…”