EVALUATION OF TCE DEGRADATION USING NEWLYDEVELOPED NANO-ZNO/ORGANIC SUPPORTS COMPOSITES
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL TECHNOLOGY
Author(s): CHANG HYUK AHN , DAE GYU JANG , JIN CHUL JOO , JONG KYU KIM , SAEROMI LEE
Abstract: The photocatalyst nano-ZnO powder was fixed on organic supports to overcome drawbacks of photocatalyst powder used in aqueous phase as difficulty of recovery and reutilization. Although photocatalyst surface area fixed on supports was resulted in decline of photocatalytic efficiency, sorption capacity of the organic supports (silicone, ABS, epoxy, polybutadiene) expected that photocatalytic efficiency was maximized through synergistic effect both the sorption capacity of organic support and phtocatalystic mechanism of ZnO. The NZOC (Nano-ZnO/Organic Composites) was manufactured according to physical and chemical combination method. Before manufacturing NZOC, the raw organic supports were evaluated about sorption capacity of TCE, which is representative nondegradable organic material. Also, the developed NZOC was evaluated about 1) water resistance tests, and 2) photocatalytic removal efficiency tests of TCE. In the results of experiment, ABS resin was observed similarly with efficiency
- Publication Date: 22-Feb-2015
- DOI: 10.15224/978-1-63248-040-8-47
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DEVELOPMENT OF BUOYANT PHOTOCATALYST BALL USING EXPANDED POLYPROPYLENE(EPP) AND TITANIUM DIOXIDE(TIO2)
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL TECHNOLOGY
Author(s): CHANG HYUK AHN , DAE GYU JANG , JIN CHUL JOO , JONG KYU KIM , SAEROMI LEE
Abstract: In this study, immobilization of TiO2 powder to EPP ball with controlled-temperature melting method was developed. The photo activity of buoyant photocatalysts was evaluated using methylene blue solution under visible light irradiation(>420 nm). Based on the associated EDS analysis, the components of uncoated EPP balls are carbon and oxygen whereas those of TiO2-coated EPP balls are carbon, oxygen, and titanium, indicating that patches of TiO2 coating cover some part of EPP balls. Based on comparison of degradation efficiency between uncoated and TiO2-coated EPP balls under UV illumination, the degradation efficiency can be significantly improved using TiO2-coated EPP balls, and surface reactions in heterogeneous photocatalysis were more dominant than photoinduced radical reactions in aqueous solutions. Thus, TiO2-coated EPP balls were found to be an effective photocatalyst for photodegradation of MB in aqueous solutions. Therefore, buoyant TiO2-coated EPP balls can be used to treat co
- Publication Date: 22-Feb-2015
- DOI: 10.15224/978-1-63248-040-8-49
- Views: 0
- Downloads: 0