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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 17, 2017
Accepted July 14, 2017

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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알칼리족 금속이 첨가된 LaCoO3 산화물에서 메틸 오렌지의 광촉매분해 반응

Photocatalytic Decomposition of Methyl Orange over Alkali Metal Doped LaCoO3 Oxides

홍성수^†

Seong-Soo Hong^†

부경대학교 화학공학과, 48547 부산광역시 남구 신선로 365

Department of Chemical Engineering, Pukyong National University, 365, Sinsun-ro, Nam-gu, Busan, 48547, Korea

sshong@pknu.ac.kr

Korean Chemical Engineering Research, October 2017, 55(5), 718-722(5), 10.9713/kcer.2017.55.5.718 Epub 19 October 2017

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Abstract

마이크로파 공정으로 제조된 순수한 LaCoO3와 금속이온이 첨가된 LaCoO3 페롭스카이트 산화물에서 메틸오렌지의 광촉매 분해반응의 활성을 조사하였다. 순수한 LaCoO3와 세슘 이온이 첨가된 LaCoO3 산화물들은 제조법과 무관하게 페롭스카이트 구조를 보여주었다. UV-Vis DRS 결과에 의하면 모든 촉매들은 가시광 영역에서 흡수스펙트럼을 나타내었다. 화학흡착된 산소종은 메틸오렌지의 광촉매 분해반응에서 중요한 역할을 하였으며, 화학흡착된 산소의 비율이 높을수록 더 높은 광촉매 활성을 보여주었다.

We have investigated the photocatalytic activity for the decomposition of methyl orange on the pure LaCoO3 and metal ion doped LaCoO3 perovskite-typeoxides prepared using microwave process. In the case of pure LaCoO3 and cesium ion doped LaCoO3 catalysts, the formation of the perovskite crystalline phase was confirmed regardless of the preparation method. From the results of UV-Vis DRS, the pure LaCoO3 and cesium ion doped LaCoO3 catalysts have the similar absorption spectrum up to visible region. The chemisorbed oxygen plays an important role on the photocatalytic decomposition of methyl orange and the higher the contents of chemisorbed oxygen, the better performance of photocatalyst.

Keywords

Photocatalytic decomposition of methyl orange Microwave process Metal ion doped LaCoO3 perovskite-type oxide

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