Preparation of g-C3N4/Ta2O5 Composites with Enhanced Visible-Light Photocatalytic Activity
- 주제(키워드) g-C3N4 , methylene blue , photocatalyst , Ta2O5 , urea
- 등재 SCIE, SCOPUS
- 발행기관 Springer New York LLC
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000122999
- 본문언어 영어
- Published As http://dx.doi.org/10.1007/s11664-015-4280-9
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
g-C3N4/Ta2O5 composites have been synthesized by a facile route in which mixtures of Ta2O5 and urea are heated at various temperatures of 450°C, 500°C, and 550°C. The obtained materials (denoted as CN/TaO-T, where T is the heating temperature) were characterized using x-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, diffuse-reflectance ultraviolet–visible (UV–Vis) spectroscopy, thermogravimetric analysis, and x-ray photoelectron spectroscopy. The results show that the as-prepared composites are in orthorhombic Ta2O5 phase coated by g-C3N4. The photocatalytic activity of the composites was evaluated by photodegradation of methylene blue under visible light. Among the three materials, CN/TaO-500 exhibited the highest photocatalytic activity. The improved photocatalytic activity of the g-C3N4/Ta2O5 composites is attributed to the presence of g-C3N4 in the materials. © 2015 The Minerals, Metals & Materials Society
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