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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.12
- 수록면
- 179 - 184 (6page)
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초록· 키워드
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The light absorbance of photocatalysts and reaction kinetics of environmental pollutants at the liquid-solid and gas-solid interfaces differ from each other. Nevertheless, many previous photocatalytic studies have applied the science to aqueopus applications without due consideration of the environment. As such, this work reports the surface and morphological characteristics and photocatalytic activities of carbon-embedded (C-TiO₂) photocatalysts for control of gas-phase methyl tertiary-butyl ether (MTBE) under a range of different operational conditions. The C-TiO₂ photocatalysts were prepared by oxidizing titanium carbide powders at 350oC. The characteristics of the C-TiO₂ photocatalysts, along with pure TiC and the reference pure TiO₂, were then determined by X-ray diffraction, scanning emission microscope, diffuse reflectance ultraviolet-visible-near infrared (UV-VIS-NIR), and Fourier transform infrared spectroscopy. The C-TiO₂ powders showed a clear shift in the absorbance spectrum towards the visible region, which indicated that the C-TiO₂ photocatalyst could be activated effectively by visible-light irradiation. The MTBE decomposition efficiency depended on operational parameters, including the air flow rate (AFR), input concentration (IC), and relative humidity (RH). As the AFRs decreased from 1.5 to 0.1 L/min, the average efficiencies for MTBE increased from 11% to 77%. The average decomposition efficiencies for the ICs of 0.1, 0.5, 1.0, and 2.0 ppm were 77%, 77%, 54%, and 38%, respectively. In addition, the decomposition efficiencies for RHs of 20%, 45%, 70%, and 95% were 92%, 76%, 50%, and 32%, respectively. These findings indicate that the prepared photocatalysts could be effectively applied to control airborne MTBE if their operational conditions were optimized.
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참고문헌 (32)
참고문헌 신청
1. [학술지(정기간행물)] - Lee JW / 2002 / Actual commuter exposure to methyl-tertiary butyl ether, benzene and toluene while traveling in Korean urban areas / SCIENCE OF THE TOTAL ENVIRONMENT 291 : 219 ~ 228
2. [학술지(정기간행물)] - Jia C / 2008 / Distributions of personal VOC exposures: a population-based analysis / Environ. Int 34 : 922 ~ 931
3. [학술지(정기간행물)] - Mannino DM / 1996 / Are oxygenated fuels effective? An evaluation of ambient carbon monoxide concentrations in 11 western states, 1986 to 1992 / J. Air Waste Manag. Assoc 46 : 20 ~ 24
4. [학술지(정기간행물)] - Dodson RE / 2008 / Influence of basements, garages, and common hallways on indoor residential volatile organic compound concentrations / Atmos. Environ 42 : 1569 ~ 1581
5. [학술지(정기간행물)] - Hun DE / 2011 / Automobile proximity and indoor residential concentrations of BTEX and MTBE / Build. Environ 46 : 45 ~ 53
2. [학술지(정기간행물)] - Jia C / 2008 / Distributions of personal VOC exposures: a population-based analysis / Environ. Int 34 : 922 ~ 931
3. [학술지(정기간행물)] - Mannino DM / 1996 / Are oxygenated fuels effective? An evaluation of ambient carbon monoxide concentrations in 11 western states, 1986 to 1992 / J. Air Waste Manag. Assoc 46 : 20 ~ 24
4. [학술지(정기간행물)] - Dodson RE / 2008 / Influence of basements, garages, and common hallways on indoor residential volatile organic compound concentrations / Atmos. Environ 42 : 1569 ~ 1581
5. [학술지(정기간행물)] - Hun DE / 2011 / Automobile proximity and indoor residential concentrations of BTEX and MTBE / Build. Environ 46 : 45 ~ 53
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UCI(KEPA) : I410-ECN-0101-2017-539-001538399