Characterization of Co-AC/TiO Composites and Their Photonic Decomposition for Organic Dyes

Chen, Ming-Liang; Son, Joo-Hee; Park, Chong-Yun; Shin, Yong-Chan; Oh, Hyun-Woo; Oh, Won-Chun

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자료유형: 학술저널

저자정보: Chen, Ming-Liang (Department of Advanced Materials & Science Engineering, Hanseo University) Son, Joo-Hee (Department of Advanced Materials & Science Engineering, Hanseo University) Park, Chong-Yun (Department of Advanced Materials & Science Engineering, Hanseo University) Shin, Yong-Chan (Department of Advanced Materials & Science Engineering, Hanseo University) Oh, Hyun-Woo (Department of Advanced Materials & Science Engineering, Hanseo University) Oh, Won-Chun (Department of Advanced Materials & Science Engineering, Hanseo University)

저널정보: 한국재료학회 한국재료학회지 한국재료학회지 제20권 제8호

발행연도: 2010.1

수록면: 429 - 433 (5page)

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In this study, activated carbon (AC) as a carbon source was modified with different concentrations of cobalt chloride ($CoCl_2$) to prepare a Co-AC composite, and it was used for the preparation of Co-AC/$TiO_2$ composites with titanium oxysulfate (TOS) as the titanium precursor. The physicochemical properties of the prepared Co-AC/$TiO_2$ composites were characterized by $N_2$ adsorption at 77 K, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis. The photocatalytic treatments of organic dyes were examined under an irradiation of visible light with different irradiation times. $N_2$ adsorption data showed that the composites had decreased surface area compared with the pristine AC, which was $389\;m^2/g$. From the XRD results, the Co-AC/$TiO_2$ composites contained a mixturephase structuresof anatase and rutile, but a cobalt oxide phase was not detected in the XRD pattern. The EDX results of the Co-AC/$TiO_2$ composites confirmed the presence of various elements, namely, C, O, Ti, and Co. Subsequently, the decomposition of methylene orange (MO, $C_{14}H_{14}N_3NaO_3S$) and rhodamine B (Rh.B, $C_{28}H_{31}ClN_2O_3$) in an aqueous solution, respectively, showed the combined effects of an adsorption effect by AC and the photo degradation effect by $TiO_2$. Especially, the Co particles in the Co-AC/$TiO_2$ composites could enhance the photo degradation behaviors of $TiO_2$ under visible light.

#activated carbon #Titanium oxysulfate #Cobalt #XRD #photodegradation #visible light

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