볼밀을 이용한 TiO2/WO3 복합체 제조 및 광촉매 특성
Photocatalysis of TiO2/WO3 Composites Synthesized by Ball Milling
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Composites of P25 TiO2 and hexagonal WO3 nanorods are synthesized through ball-milling in order to study photocatalytic properties. Various composites of TiO2/WO3 are prepared by controlling the weight percentages (wt%) of WO3, in the range of 1–30 wt%, and milling time to investigate the effects of the composition ratio on the photocatalytic properties. Scanning electron microscopy, x-ray diffraction, and transmission electron microscopy are performed to characterize the structure, shape and size of the synthesized composites of TiO2/WO3. Methylene blue is used as a test dye to analyze the photocatalytic properties of the synthesized composite material. The photocatalytic activity shows that the decomposition efficiency of the dye due to the photocatalytic effect is the highest in the TiO2/ WO3 (3 wt%) composite, and the catalytic efficiency decreases sharply when the amount of WO3 is further increased. As the amount of WO3 added increases, dye-removal by adsorption occurs during centrifugation, instead of the decomposition of dyes by photocatalysts. Finally, TiO2/WO3 (3 wt%) composites are synthesized with various milling times. Experimental results show that the milling time has the best catalytic efficiency at 30 min, after which it gradually decreases. There is no significant change after 1 hour.
Abstract
Composites of P25 TiO2 and hexagonal WO3 nanorods are synthesized through ball-milling in order to study photocatalytic properties. Various composites of TiO2/WO3 are prepared by controlling the weight percentages (wt%) of WO3, in the range of 1–30 wt%, and milling time to investigate the effects of the composition ratio on the photocatalytic properties. Scanning electron microscopy, x-ray diffraction, and transmission electron microscopy are performed to characterize the structure, shape and size of the synthesized composites of TiO2/WO3. Methylene blue is used as a test dye to analyze the photocatalytic properties of the synthesized composite material. The photocatalytic activity shows that the decomposition efficiency of the dye due to the photocatalytic effect is the highest in the TiO2/ WO3 (3 wt%) composite, and the catalytic efficiency decreases sharply when the amount of WO3 is further increased. As the amount of WO3 added increases, dye-removal by adsorption occurs during centrifugation, instead of the decomposition of dyes by photocatalysts. Finally, TiO2/WO3 (3 wt%) composites are synthesized with various milling times. Experimental results show that the milling time has the best catalytic efficiency at 30 min, after which it gradually decreases. There is no significant change after 1 hour.
참고문헌 (15)
- 이규영, "폐수 재이용을 위한 무기계 광촉매 담체 연구", 한국물환경학회지, 31(1), pp.42~48 (2015), 한국물환경학회
- P. Basnet, , J. Mater. Chem. A, 2, pp.911~ (2014)[DOI]
- C. Byrne, , J. Environ. Chem. Eng., 6, pp.3531~ (2017)
- A. J. Haider, , Energy Procedia, 119, pp.332~ (2017)[DOI]
- M. R. D. Khaki, , J. Mol. Liq., 258, pp.354~ (2018)[DOI]
- K. D. Kumar, , Mater. Today Proc., 2, pp.3736~ (2015)[DOI]
- T. Peng, , Mater. Res. Bull., 105, pp.104~ (2018)[DOI]
- 유수열, "수열합성법으로 제조된 나노막대 구조 WO3의 광촉매 효과 및 염료 흡착 반응", 한국분말재료학회지, 24(6), pp.483~488 (2017), 한국분말재료학회[DOI]
- C. Shifu, , Powder Technol., 160, pp.198~ (2005)[DOI]
- V. Navarro, , Phys. Rev. B, 78, pp.224107~ (2008)[DOI]
- G. Zerjava, , Appl. Catal. B- Environ., 209, pp.273~ (2017)[DOI]
- S. Begin-Colin, , J. Phys. Chem. C, 113, pp.16589~ (2009)[DOI]
- S. Indris, , J. Phys. Chem. B, 109, pp.23274~ (2005)[DOI]
- X. Fu, , J. Hazard. Mater., 244, pp.102~ (2013)
- Y. Li, , Water Res., 40, pp.1119~ (2006)[DOI]