Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on The Air Pollution Reduction Performance of Mortar Coated with Photocatalyst

광촉매를 코팅한 모르타르의 미세먼지 저감 성능 연구

  • Seung-Jin Lee (Department of Civil Engineering, Kunsan National University) ;
  • Min-Ki Jeon (Department of Civil Engineering, Kunsan National University) ;
  • Seung-Tae Jeong (Department of Civil Engineering, Kunsan National University) ;
  • In-Hwan Yang (Department of Civil Engineering, Kunsan National University)
  • 이승진 (군산대학교 토목공학과) ;
  • 전민기 (군산대학교 토목공학과) ;
  • 정승태 (군산대학교 토목공학과) ;
  • 양인환 (군산대학교 토목공학과)
  • Received : 2024.01.30
  • Accepted : 2024.03.04
  • Published : 2024.03.30
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Abstract

In this paper, the performance of air pollution reduction by coating the photocatalyst solution on the mortar surface was analyzed to ensure the possibility of applying the photocatalyst to structures with a large specific surface area. The photocatalytic concentrations of the coating solution were set to 1.5 % and 3.0 %, and the types of binders were considered as experimental variables, such as ultra-high performance concrete (UHPC), ordinary portland cement (OPC), and blast furnace slag. As the photocatalyst concentration increases, the air pollution reduction performance increases. In addition, as a result of the air pollution reduction performance, the NOx concentration reduction rate was the highest for UHPC, and the air pollution reduction performance increased as the blast furnace slag was replaced. Therefore, the amount of TiO2 remaining on the surface varies depending on the density of the tissue due to the difference in particles caused by the difference in the amount of TiO2 remaining on the surface.

본 연구에서는 광촉매를 비표면적이 큰 구조물에 적용 가능성을 확보하기 위하여 광촉매 용액을 모르타르 표면에 코팅을 통한 미세먼지 저감성능을 분석하였다. 코팅 용액의 광촉매 농도는 1.5 %와 3.0 %로 설정하였으며, 바인더의 종류는 초고성능 콘크리트(UHPC), 보통포틀랜드시멘트(OPC), 고로슬래그(blast furnace slag)를 실험변수로 고려하였다. 전체 모르타르가 공통적으로 광촉매 농도가 증가할수록 NOx 농도 저감률이 증가하였으며, 이는 광촉매 농도가 증가할수록 미세먼지 저감 성능이 증가하는 것을 나타낸다. 또한, 미세먼지 저감 성능 결과 NOx 농도 저감률이 UHPC가 가장 크게 나타났으며, 고로슬래그로 치환할수록 미세먼지 저감 성능이 크게 나타났다. 이는 바인더의 입자의 차이로 인해 내부조직의 치밀함에 따라 표면에 남아있는 TiO2 성분량 차이로 인해 미세먼지 저감 성능에 영향을 미쳤다고 판단된다.

Keywords

Acknowledgement

이 논문은 2021년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업입니다(No. 2021R1I1A3059986).

References

  1. Ballari, M.M., Yu, Q.L., Brouwers, H.J.H. (2011). Experimental study of the NO and NO2 degradation by photocatalytically active concrete, Catalysis Today, 161(1), 175-180. https://doi.org/10.1016/j.cattod.2010.09.028
  2. Faraldos, M., Kropp, R., Anderson, M.A., Sobolev, K. (2016). Photocatalytic hydrophobic concrete coatings to combat air pollution, Catalysis Today, 259, 228-236. https://doi.org/10.1016/j.cattod.2015.07.025
  3. Fontana, P., Miccoli, L., Kocadag, R., Silva, N., Qvaeschning, D., Kreft, O., Cederqvist, C. (2016). Composite UHPC facade elements with functional surfaces, HiPerMat, 2016, 9-11.
  4. Fiore, A., Marano, G.C., Monaco, P., Morbi, A. (2013). Preliminary experimental study on the effects of surface-applied photocatalytic products on the durability of reinforced concrete, Construction and Building Materials, 48, 137-143. https://doi.org/10.1016/j.conbuildmat.2013.06.058
  5. Hashimoto, K., Irie, H., Fujishima, A. (2005). TiO2 photocatalysis: a historical overview and future prospects, Japanese Journal of Applied Physics, 44(12R), 8269-8285. https://doi.org/10.1143/JJAP.44.8269
  6. Jimenez-Relinque, E., Rodriguez-Garcia, J.R., Castillo, A., Castellote, M. (2015). Characteristics and efficiency of photocatalytic cementitious materials: type of binder, roughness and microstructure, Cement and Concrete Research, 71, 124-131. https://doi.org/10.1016/j.cemconres.2015.02.003
  7. Karapati, S., Giannakopoulou, T., Todorova, N., Boukos, N., Antiohos, S., Papageorgiou, D., Chaniotakis, E., Dimotikali, D., Trapalis, C. (2014). TiO2 functionalization for efficient NOx removal in photoactive cement, Applied Surface Science, 319, 29-36. https://doi.org/10.1016/j.apsusc.2014.07.162
  8. Lucas, S.S., Ferreira, V.M., De Aguiar, J.B. (2013). Incorporation of titanium dioxide nanoparticles in mortars-Influence of microstructure in the hardened state properties and photocatalytic activity, Cement and Concrete Research, 43, 112-120. https://doi.org/10.1016/j.cemconres.2012.09.007
  9. Marzouk, S.S., Naddeo, V., Banat, F., Hasan, S.W. (2021). Preparation of TiO2/SiO2 ceramic membranes via dip coating for the treatment of produced water, Chemosphere, 273, 129684.
  10. Park, H.W., Park, J.H., Yang, I.H. (2020). Estimation of the pollution removal performance of concrete containing photocatalyst, Proceeding of the Korea Concrete Institute, 32(1), 331-332.
  11. Quagliarini, E., Bondioli, F., Goffredo, G.B., Cordoni, C., Munafo, P. (2012). Self-cleaning and de-polluting stone surfaces: TiO2 nanoparticles for limestone, Construction and Building Materials, 37, 51-57. https://doi.org/10.1016/j.conbuildmat.2012.07.006
  12. Si, H., Zhou, M., Fang, Y., He, J., Yang, L., Wang, F. (2021). Photocatalytic concrete for NOx degradation: Influence factors and durability, Construction and Building Materials, 298, 123835.
  13. Sidodikromo, E.P., Chen, Z., Habib, M. (2019). Review of the cement-based composite ultra-high-performance concrete (UHPC), The Open Civil Engineering Journal, 13(1).
  14. Sikkema, J.K., Ong, S.K., Alleman, J.E. (2015). Photocatalytic concrete pavements: Laboratory investigation of NO oxidation rate under varied environmental conditions, Construction and Building Materials, 100, 305-314. https://doi.org/10.1016/j.conbuildmat.2015.10.005
  15. Sugranez, R., Alvarez, J.I., Cruz-Yusta, M., Marmol, I., Morales, J., Vila, J., Sanchez, L. (2013). Enhanced photocatalytic degradation of NOx gases by regulating the microstructure of mortar cement modified with titanium dioxide, Building and Environment, 69, 55-63. https://doi.org/10.1016/j.buildenv.2013.07.014
  16. Yang, I.H., Park, H.W., Jeon, H.J., (2020). Experimental study on the self-cleaning of photocatalyst concrete surface, Proceedings of the Korean Recycled Construction Resources Institute 2020 Fall Conference, 19-20.
  17. Yousefi, A., Allahverdi, A., Hejazi, P. (2013). Effective dispersion of nano-TiO2 powder for enhancement of photocatalytic properties in cement mixes, Construction and Building Materials, 41, 224-230. https://doi.org/10.1016/j.conbuildmat.2012.11.057