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논문 기본 정보

자료유형
학술저널
저자정보
Jin Chul Joo (Hanbat National University) Saeromi Lee (Korea Institute of Civil Engineering and Building Technology) Chang Hyuk Ahn (Korea Institute of Civil Engineering and Building Technology) Inju Lee (Hanbat National University) Zihan Liu (Hanbat National University) Jae-Roh Park (Korea Institute of Civil Engineering and Building Technology)
저널정보
응용생태공학회 Ecology and Resilient Infrastructure Ecology and Resilient Infrastructure Vol.3 No.4
발행연도
2016.12
수록면
215 - 220 (6page)

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A new immobilization technique of nanoscale TiO₂ powder to expanded polystyrene (EPS) balls with temperature-controlled melting method was developed, and the photocatalytic activity of TiO2 powder-embedded EPS balls were evaluated using methylene blue (MB) solution under ultraviolet irradiation (λ= 254 nm). Based on the scanning electron microscope (SEM) images and associated energy-dispersive X-ray spectroscopy (EDX) analysis, the components of the intact EPS balls were mainly carbon and oxygen, whereas those of TiO₂-immobilized EPS balls were carbon, oxygen, and titanium, indicating that relatively homogenous patches of TiO₂ and glycerin film were coated on the surface of EPS balls. Based on the comparison of degradation efficiencies of MB between intact and TiO₂-immobilized EPS balls under UVC illumination, the degradation efficiencies of MB can be significantly improved using TiO₂-immobilized EPS balls, and surface reactions in heterogeneous photocatalysis were more dominant than photo-induced radical reactions in aqueous solutions. Thus, TiO₂-immobilized EPS balls were found to be an effective photocatalyst for photodegradation of organic compounds in aqueous solutions without further processes (i.e., separation, recycling, and regeneration of TiO₂ powder). Further study is in progress to evaluate the feasibility for usage of buoyant TiO₂-immobilized EPS to inhibit the excessive growth of algae in rivers and lakes.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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