Photocatalytic reactor for organic compound removal using photocatalytic mechanism

Abstract

In this work, a photocatalytic reactor with a working volume of 13 l was fabricated of soda-lime silica glass. Commercial titanium dioxide (TiO 2) particles were used as the photocatalyst and trails were conducted on the photodecomposition of methylene blue (MB) solutions (10 −5 M). The activation of the photocatalysts was carried out using 5 UV lamps (378 nm, 36 W), and 13 g of TiO 2 was added each week to the reactor. The MB solution was fed at a flow rate of 0.87 l h −1 , while the effluent was removed after 5 h of hydraulic retention time. The performance of the reactor was studied over a period of 45 days. The results showed a sharp decline in the dissolved oxygen (DO) concentration and pH of the solution with the increased addition of TiO 2 to the reactor owing to the occurrence of the photocatalytic process. The reactor was found to be highly effective in decomposing MB solution. The performance was observed to slightly decrease over the long operating period owing to the TiO 2 accumulation on the reactor wall, and its non-participation in the reactions.

Influence of Preparation Methods of TiO₂ Nano-Particle on Photodegradation of Methylene Blue

“…Although the MB removal efficiency in this study was not great as other previous works [14,21,22], which shown >90% of photodegradation efficiency. The different operating factors are significant reasons such as light intensity, light wavelength, TiO2 loading, MB concentration, pH, dissolved oxygen and system design [13,23].…”

Combi-Matrix Based on TiO2 Aerogel for Diagnosis of Sepsis Using Laser Desorption and Ionization Mass Spectrometry

“…TiO 2 in various nanostructures has been reported to have suitable properties for the ionization and desorption of analytes as a solid matrix for LDI-MS. The photocatalytic activity of the TiO 2 aerogels was estimated using methylene blue as the model analyte, as shown in Figure a. , The photodecomposition of methylene blue occurs when UV irradiates on TiO 2 which induces charge excitation and separation. As a result, hydroxyl radicals are formed on the TiO 2 surface.…”

“…The photocatalytic activity of the TiO 2 aerogels was estimated using methylene blue as the model analyte, as shown in Figure 2a. 36,37 The photodecomposition of methylene blue occurs when UV irradiates on TiO 2 which induces charge excitation and separation. As a result, hydroxyl radicals are formed on the TiO 2 surface.…”

Physical Properties of Fast-Growing Wood-Polymer Nano Composite Synthesized through TiO2 Nanoparticle Impregnation

“…The 1% TiO 2 nanoparticle (82.49%) and 5% TiO 2 nanoparticle (74.35%)—impregnated wood had a higher photocatalytic activity than the untreated. The end result of the photocatalytic reaction is carbon dioxide gas which can be released into nature and can be utilized by plants for the photosynthesis process [ 50 ].…”