논문 국내 국내전문학술지(KCI급) Development of Titanium Dioxide (TiO₂)-immobilized Buoyant Photocatalyst Balls Using Expanded Polystyrene (EPS)
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2016-12
- 저자명 주진철, Saeromi Lee, Chang Hyuk Ahn, Inju Lee, Zihan Liu, Jae-Roh Park
- 학술지명 Ecology and Resilient Infrastructure
- 발행처명 응용생태공학회
- 발행국가 국내
- 논문언어 외국어
- 연구분야 공학 > 환경공학
- 원문 링크 10.17820/eri.2016.3.4.215
홈페이지논문 초록 (Abstract)
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.