Open AccessWetted Wall Photocatalytic Reactor for Methylene Blue Degradation
Author(s) -
Amornpon Boonying,
Artith Kasempremsak,
Supunee Junpirom,
Aroonsri Nuchitprasittichai
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/778/1/012060
Subject(s) - photocatalysis , methylene blue , titanium dioxide , materials science , catalysis , hydrogen peroxide , anatase , adsorption , chemical engineering , nuclear chemistry , photochemistry , chemistry , composite material , organic chemistry , engineering
Titanium dioxide (TiO 2 ) is generally known a good potential of photocatalyst to synthesis hydrogen peroxide (H 2 O 2 ). The aim of this work is to generate the H 2 O 2 via photocatalysis for further application in a sterilization system. Wetted wall photocatalytic reactor (WWPR) was particularly designed as a prototype for carrying out the experiments of photocatalytic reaction. An advantage of WWPR is a high contact surface area of feed and catalyst mixture with UV light to enhance a high efficiency to produce the H 2 O 2 . The TiO 2 photocatalyst was prepared via sol-gel method and mixed with rice husk based silica dioxide (SiO 2 ). Properties of photocatalyst were investigated by XRD, SEM and surface area and its photocatalytic performance was tested by methylene blue degradation with reaction measurement using the UV/Vis instrument. Variation of the catalysts loading and methylene blue initial concentration were studied in photocatalytic experiments. In the batch of 0. 25 g of photocatalyst with 80 mg/L methylene blue solution, the results showed that the percentage of methylene blue removal is at 89. 52% within 2 hours of reaction. This removal efficiency of methylene blue is resulted from both mechanisms of degradation by photocatalytic reaction and adsorption by the function of SiO 2 modification and the trap-hole of crystallized anatase structure