태양광/자외선/이산화티타늄(TiO2)을 이용한 절약형 광촉매 반응 처리시스템 개발

Abstract

Pollution purification using titanium dioxide (TiO2) photocatalyst has attracted a great deal of attention with increasing number of recent environmental problems. Currently, the application of TiO2 photocatalyst has been focused on purification and treatment of waste water. However, the use of conventional TiO2 powder photocatalyst results in disadvantage of stirring during the reaction and of separation after the reaction. And the usage of artificial UV lamp has made the cost of photocatalyst treatment system high. Consequently, we herein studied the pilot-scale design to aid in optimization of the energy-saving process for more through development and reactor design by solar light/UV lamp/TiO2 system. In this study, we manufactured the TiO2 sol by sol-gel method. According to analysis by XRD, SEM and TEM, characterization of TiO2 sol were nano-size (5~6 nm) and anatase type. Inorganic binder (SiO2) was added to TiO2 sol to be coated for support strongly, and support of ceramic bead was used to lower separation rate that of glass bead. The influences were studied of various experimental parameters such as TiO2 quantity, pH, flow rate, additives, pollutants concentration, climate condition and reflection plate by means of reaction time of the main characteristics of the obtained materials. In waste water treatment system, variable reactor as solar light/ or UV lamp according to climate condition such as sunny and cloudy days treated the phenol and E-coli(Escherichia coli) effectively.