Investigation on the Preparation Method of TiO2-mayenite for NOx Removal 


Vol. 26,  No. 4, pp. 304-310, Dec.  2020
10.7464/ksct.2020.26.4.304


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  Abstract

In order to apply a photocatalyst (TiO2) to various building materials, TiO2-mayenite was prepared in this study. The TiO2 was synthesized using the sol-gel method by fixing titanium isopropoxide (TTIP) and urea at a ratio of 1 : 1. Later, they were calcined in a temperature range of 400-700 ℃ to analyze the properties according to temperature. BET, TGA, and XRD were used to analyze the physical and chemical properties of TiO2. The nitrogen oxide removal test was confirmed by measuring the change in the concentration of NO for 1 h according to KS L ISO 22197-1. The prepared TiO2 samples exhibited an anatase crystal structure below 600 ℃, and TiO2 (urea)-400 showed the highest nitrogen oxide removal rate at 2.35 μmol h-1. TiO2-mayenite was prepared using two methods: spraying TiO2 dispersion solution (s/s) and sol-gel solution (g/s). Through BET and XRD analysis, it was found that 5-TiO2 (g/s) prepared by spraying a sol-gel solution has maintained its crystallinity even after heat treatment. Also, 5-TiO2 (g/s)-500 showed the highest removal rate of 0.55 μmol h-1 in the nitrogen oxide removal test. To prepare TiO2-mayenite, it was confirmed that mayenite should be blended with TiO2 in a sol-gel state to maintain the crystal structure and exhibit a high nitrogen oxide removal rate.

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  Cite this article

[IEEE Style]

P. JH, P. JJ, P. HJ, Y. KB, "Investigation on the Preparation Method of TiO2-mayenite for NOx Removal," Clean Technology, vol. 26, no. 4, pp. 304-310, 2020. DOI: 10.7464/ksct.2020.26.4.304.

[ACM Style]

Park JH, Park JJ, Park HJ, and Yi KB. 2020. Investigation on the Preparation Method of TiO2-mayenite for NOx Removal. Clean Technology, 26, 4, (2020), 304-310. DOI: 10.7464/ksct.2020.26.4.304.

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