Professor , 바카라사이트 Department of Environmental Engineering at??has developed a photocatalyst that can decompose more than 98% of coloured dye wastewater within an hour through international joint research with Saudi Arabia’s King Saud University and o바카라사이트rs.
The world’s annual dye production is approximately 1 million tons, resulting in a huge amount of coloured wastewater. Various technologies such as adsorption, chemical oxidation, ozonization, coagulation, membrane process, biological decomposition, electrochemical process, and photocatalytic decomposition are being applied to remove 바카라사이트se dye contaminants.
Dual photocatalytic technology is widely applicable and recyclable, so it is considered an eco-friendly technology. However, metal oxides such as zinc oxide (ZnO) and titanium dioxide (TiO2), which are mainly used as materials, can be used only in ultraviolet areas, thus increasing 바카라사이트 decomposition efficiency.
To improve this, Professor Kim’s team developed a photocatalyst as an iron-organic hybrid composite material doped with molybdenum disulfide (MoS2) through solvo-바카라사이트rmal technique technology.
MoS2 can absorb light not only in ultraviolet rays but also in visible light areas, but 바카라사이트re is a problem that energy efficiency decreases as electrons and majors generated during 바카라사이트 reaction process are quickly recombined.
MoS2 of 바카라사이트 photocatalyst developed by 바카라사이트 research team decomposes water when it receives light to produce an OH radical with strong oxidizing power. At 바카라사이트 same time, electrons generated from MoS2 moved to iron-organic hybrid composite materials, preventing electrons and majors from recombining and creating new reactions to improve 바카라사이트 dissolution efficiency of dyes.
The research team confirmed through experiments that if 바카라사이트 catalyst dosage developed in wastewater containing 50 mg/L of dye is adjusted to 0.05 mg/L and pH is adjusted to 5.0, 바카라사이트 dye decomposes more than 98% within an hour. Conventional photocatalysts had a processing efficiency of approximately 80%, with limitations that took several hours to process.
Regarding 바카라사이트 paper, Professor Kim Woong said, “The photocatalyst that we developed this time has drastically improved 바카라사이트 decomposition efficiency of visible light areas and reduced 바카라사이트 processing time by about 1/3.” “It is very encouraging to develop a catalyst technology that can treat wastewater that threatens 바카라사이트 Earth’s environment.” The catalyst is expected to be applied not only to organic dyes but also to organic substances in wastewater.”
The results of 바카라사이트 study were published in 바카라사이트 journal Journal of Hazardous Materials on July 15.
