Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Improvement of Nitrogen Oxide Removal of Concrete Sidewalk Block Using by Conductive Photocatalyst

전도성 광촉매를 이용한 콘크리트 블록의 대기중 질소산화물 저감에 관한 연구

  • Geun-Guk Bae (Growth Support Division, Busan Resional SMEs and Stratups office) ;
  • In-Sook Cho (Shekinahmaterials) ;
  • Yong-Sik Ahn (Department of Materials Science & Engineering, Pukyong National University)
  • 배근국 (부산지방중소벤처기업청 성장지원과) ;
  • 조인숙 (쉐카이나머티리얼즈) ;
  • 안용식 (국립부경대학교 재료공학과)
  • Received : 2023.11.08
  • Accepted : 2023.12.08
  • Published : 2023.12.30
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Abstract

The use of TiO2 photocatalyst in the production of concrete blocks for the purpose of nitrogen oxide reduction is an issue of controversy due to the conflicting evidence on its effectiveness. Efforts have been made to reduce the level of nitrogen oxides in the environment by using of titanium dioxide (TiO2). This study examined the effect of incorporating activated carbon into concrete blocks on the reduction of nitrogen oxides released into the atmosphere and the durability of the blocks. The efficiency of photocatalyst was enhanced through the addition of a surrounding conductive substance. The addition of activated carbon resulted in a significant increase in the electrical conductivity of photocatalytic blocks and improved durability. The cement mixture using 5 % TiO2 and 15 % activated carbon exhibited the optimal mixing ratio for the purpose of nitrogen oxide removal. The effect of the addition of conductive carbon to the photocatalytic blocks was discussed with the results of conductivity, flexural and comprssive strength and nitrogen oxide removal test. The relationship between the addition of conductive carbon to the photocatalytic blocks and its resulting effects have been studied by several tests, including conductivity, flexural and compressive strength, and nitrogen oxide removal.

본 연구에서는 전도성 재료를 혼입한 광촉매 보도블록을 제조하여 질소산화물 제거율에 미치는 영향을 살펴보고 내구성이 향상된 블록을 제조하고자 하였다. 광촉매와 전도성 재료인 활성탄소를 혼입시 광촉매 효율이 향상되었으며 전도성 광촉매 콘크리트 블록의 경우 광촉매 콘크리트 블록보다 질소산화물 제거율이 2.5배 정도 향상되었다. 전도성 광촉매 시험편의 질소산화물 제거율이 높게 나타난 것은 전도성 재료인 활성탄소의 영향으로 TiO2 광분해로 인한 광전류가 많이 발생한 영향으로 볼 수 있으며 광촉매 시험편과 전도성 광촉매 시험편의 질소산화물 제거율 실험결과와 광전류 시험결과를 비교 분석하였다.

Keywords

Acknowledgement

이 논문은 부경대학교 자율창의학술연구비(2023년)에 의해 연구되었습니다.

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