Effect of calcination temperature on photocatalytic activities of Er-TiO2 nanotubes
2
조회
0
다운로드
6
인용
0
참고문헌
키워드
초록
0.7 mol% Er-TiO2 nanotubes were prepared using a sol-gel derived electrospinning and subsequent calcination at intervals of50 oC from 500 oC to 650 oC to investigate the effect of calcination temperature on the crystal structure and the photocatalyticactivity of methylene blue (MB). X-ray diffraction (XRD) results indicated that Er-TiO2 nanotubes calcined at 500 oC werecomposed of anatase only. However, mixed phases of anatase (51%, 55%, 96%) and rutile (49%, 45%, 4%) were observedfor the nanotubes calcined at 550 oC, 600 oC and 650 oC, respectively. As the calcination temperature rose from 500 oC to600 oC, the Barrette-Emmett-Teller (BET) surface area and degradation kinetic constant increased from 97.77 m2/g to117.62 m2/g and from 1.2 × 10−2 min−1 to 1.6 × 10-2 min-1, respectively. The Er-TiO2 nanotubes calcined at 600 oC exhibitedenhanced MB degradation (87%) compared to that of Er-TiO2 nanofibers (37%) due to the synergic combinations of tailoredmixed crystals and larger BET area.
Abstract
0.7 mol% Er-TiO2 nanotubes were prepared using a sol-gel derived electrospinning and subsequent calcination at intervals of50 oC from 500 oC to 650 oC to investigate the effect of calcination temperature on the crystal structure and the photocatalyticactivity of methylene blue (MB). X-ray diffraction (XRD) results indicated that Er-TiO2 nanotubes calcined at 500 oC werecomposed of anatase only. However, mixed phases of anatase (51%, 55%, 96%) and rutile (49%, 45%, 4%) were observedfor the nanotubes calcined at 550 oC, 600 oC and 650 oC, respectively. As the calcination temperature rose from 500 oC to600 oC, the Barrette-Emmett-Teller (BET) surface area and degradation kinetic constant increased from 97.77 m2/g to117.62 m2/g and from 1.2 × 10−2 min−1 to 1.6 × 10-2 min-1, respectively. The Er-TiO2 nanotubes calcined at 600 oC exhibitedenhanced MB degradation (87%) compared to that of Er-TiO2 nanofibers (37%) due to the synergic combinations of tailoredmixed crystals and larger BET area.
참고문헌 (15)
- D. A. H. Hanaor, , J. Mater. Sci, 46, pp.855~874 (2011)
- C. Y. W. Lin, , Ceram. Intl, 38, pp.3943~3946 (2012)
- B. Murugan, , J. Phys. Chem. C, 112, pp.20429~20442 (2008)
- G. Liu, , Chemsphere, 59, pp.1367~1371 (2005)
- D.Y. Lee, , Curr. Appl. Phys, 11, pp.S324~S327 (2011)
- D. Y. Lee, , Phys. Status Solidi C, 9, pp.1423~1426 (2012)
- Y. Song, , J. Nanosci. Nanotechnol, 17, pp.7943~7946 (2017)
- 송요승, "Photocatalytic Activity of Al-TiO2 Nanomaterials for the Degradation of Methylene Blue Dye", Journal of the Korean Physical Society, 72(3), pp.412~416 (2018), 한국물리학회
- 이득용, "Preparation and photocatalytic degradation of erbium doped titanium dioxide nanorods", Current Applied Physics, 12(4), pp.1229~1233 (2012), 한국물리학회[DOI]
- 이득용, "Effect of Er doping on optical band gap energy of TiO2 thin films prepared by spin coating", Current Applied Physics, 13(7), pp.1301~1305 (2013), 한국물리학회
- 이득용, "Titania Nanofibers Prepared by Electrospinning", Journal of the Korean Physical Society, 48(6), pp.1686~1690 (2006), 한국물리학회
- 송요승, "Photocatalytic activity of TiO2 nanomaterials", Journal of Ceramic Processing Research, 17(11), pp.1197~1201 (2016), 청정에너지연구소[DOI]
- 오가연, "Synthesis and Characterization of Electrospun PU", PCL Hybrid Scaffolds, 2018, pp.26(1), 48~53[DOI]
- 설보경, "전기방사법으로 제조한 PU", PEG 복합 지지체의 특성, 2017, pp.38(5), 248~255[DOI]
- K. M. Parida, , J. Mol. Catal. A : Chem, 287, pp.151~158 (2008)