In this study, we evaluated the photocatalytic oxidation efficiency of aromatic volatile hydrocarbons by using WO3–doped TiO2 nanotubes (WTNTs) under visible-light irradiation. One-dimensional WTNTs were synthesized by ultrasonic-assisted hydrothermal method and impregnation. XRD analysis revealed successful incorporation of WO3 into TiO2 nanotube (TNT) structures. UV-Vis spectra exhibited that the synthesized WTNT samples can be activated under visible light irradiation. FE-SEM and TEM images showed the one-dimensional structure of the prepared TNTs and WTNTs. The photocatalytic oxidation efficiencies of toluene, ethylbenzene, and o-xylene were higher using WTNT samples than undoped TNT. These results were explained based on the charge separation ability, adsorption capability, and light absorption of the sample photocatalysts. Among the different light sources, light-emitting-diodes (LEDs) are more highly energy-efficient than 8-W daylight used for the photocatalytic oxidation of toluene, ethylbenzene, and o-xylene, though the photocatalytic oxidation efficiency is higher for 8-W daylight.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 광반응 나노소재 특성 분석
  2.3. 광반응 나노소재 활성 시험
 3. 결과 및 고찰
  3.1. 특성평가
  3.2. 광반응 나노소재 활성도 평가
 4. 결 론
 REFERENCES

• 조완근(경북대학교 환경공학과) | Wan-Kuen Jo
• 신승호(대구보건대학교 보건환경과) | Seung-Ho Shin
• 최정학(부산가톨릭대학교 환경공학과) | Jeong-Hak Choi
• 이준엽(켐토피아 기업부설 생활환경연구소) | Joon Yeob Lee Corresponding author