화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.26, No.3, 356-361, June, 2015
DOI10.14478/ace.2015.1046  Export Citation
가시광선하에서 Cd0.5Zn0.5S/ZnO 광촉매를 이용한 로다민 B의 광분해 반응
Photocatalytic Degradation of Rhodamine B Using Cd0.5Zn0.5S/ZnO Photocatalysts under Visible Light Irradiation
이현정, 진영읍, 박성수, 홍성수1, 이근대†
  • 부경대학교 공업화학과
  • 1부경대학교 화학공학과
Hyun Jung Lee, Youngeup Jin, Seong Soo Park, Seong Soo Hong1, and Gun Dae Lee†
  • Department of Industrial Chemistry, Pukyong National University, Sinseon-ro, Nam-Gu, Busan 608-739, Korea
  • 1Department of Chemical Engineening, Pukyong National University, Sinseon-ro, Nam-Gu, Busan 608-739, Korea
E-mail:
초록
Cd0.5Zn0.5S/ZnO 형태의 복합체 광촉매를 침전법으로 제조하였고, 이들 화합물의 특성을 XRD, UV-vis DRS, PL 및 FE-SEM 등을 이용하여 조사하였다. 그리고 가시광선 조사 하에서의 로다민 B 분해반응에 대한 광촉매로서의 활성을 조사하였다. ZnO와는 달리 Cd0.5Zn0.5S/ZnO는 자외선 뿐만 아니라 가시광선 영역의 빛도 효율적으로 흡수하며 특히 Cd0.5Zn0.5S의 함량 증가에 따라 가시광선 영역의 빛에 대한 흡광도도 증가하였다. 또한 Cd0.5Zn0.5S/ZnO에 있어서 Cd0.5Zn0.5S의 함량이 증가할수록 최종 입자들의 크기가 작아지고 그 결과 비 표면적이 증가하였다. 로다민 B의 광분해 반응에 있어서는 Cd0.5Zn0.5S 함량이 높은 Cd0.5Zn0.5S/ZnO 촉매일수록 상대적으로 높은 광촉매 활성을 보여주었다. 그러므로 Cd0.5Zn0.5S/ZnO 광촉매의 활성에 있어서는 촉매의 흡착능력 뿐만 아니라 Cd0.5Zn0.5S와 ZnO 사이의 heterojunction 효과도 중요하게 작용하는 것으로 보인다.
Cd0.5Zn0.5S/ZnO composite photocatalysts were synthesized using the precipitation method and characterized by XRD, UV-vis DRS, PL and FE-SEM. Photocatalytic activities of the materials were evaluated by measuring the degradation of rhodamine B under visible light irradiation. Contrary to ZnO, Cd0.5Zn0.5S/ZnO materials absorb visible light as well as UV and their absorption intensities in visible region increased with increasing the Cd0.5Zn0.5S amount. The increment in the Cd0.5Zn0.5S content in Cd0.5Zn0.5S/ZnO also leads to reducing the particle size and consequently increasing the specific surface area. Cd0.5Zn0.5S/ZnO materials with the larger Cd0.5Zn0.5S content showed the higher activity in the photocatalytic degradation of rhodamine B under visible light irradiation. Therefore, the heterojunction effect between Cd0.5Zn0.5S and ZnO as well as the adsorption capacity seems to give important contributions to the photocatalytic activity of the Cd0.5Zn0.5S/ZnO.
Keywords:cadmum zinc sulfide;zinc oxide;composite;photocatalyst;visible light
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