Facile post-synthesis and photocatalytic activity of N-doped ZnO-SBA-15
- 주제(키워드) Nanostructures , Semiconductors , Sol-gel growth , X-ray diffraction , Optical properties
- 등재 SCIE, SCOPUS
- 발행기관 PERGAMON-ELSEVIER SCIENCE LTD
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000086906
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.jpcs.2013.11.011
초록/요약
N-doped ZnO-SBA-15 materials (denoted as nN-xZnO-SBA-15, where n is number of urea treatments and x is the weight ratio of ZnO/(ZnO+SBA-15)) were successfully synthesized by a two-step procedure. First, xZnO-SBA-15 was prepared by impregnating SBA-15 with Zn(NO3)(2), followed by calcinating at 550 degrees C. In the second step, xZnO-SBA-15 was modified n times by doping nitrogen with the assistance of urea. The resulting nN-xZnO-SBA-15 materials prepared with various numbers of urea treatments were characterized by XRD, TEM, SEM, EDS, N-2 adsorption/desorption at 77 K, diffuse reflectance UV-vis, and XPS. The results show that the nN-xZnO-SBA-15 maintains its ordered hexagonal mesostructure and exhibits light absorbance in the visible region. The nN-xZnO-SBA-15 samples were investigated with the photodegradation of methylene blue under visible light, and exhibited significant photocatalytic activity. The kinetics of the reaction obeyed the Langmuir-Hinshelwood model. (C) 2013 Elsevier Ltd. All rights reserved.
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