期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 89, 期 3-4, 页码 543-550出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2009.01.019
关键词
TiO2-x-y NxFy visible photocatalyst; Supercritical treatment; NH4F/ethanol fluid; Photodegradation of methylene blue; Synergetic promoting effects
资金
- National Natural Science Foundation of China [20825724]
- Shanghai Government [S30406, 07dz22303, 0852nm01000, 09YZ162]
- Shanghai Normal University [DZL807, SK200838]
A novel N and F co-doped TiO2 (TiO2-x-yNxFy) photocatalyst is prepared by treating the TiO2 precursor in NH4F/ethanol fluid under supercritical conditions. During photocatalytic degradation of methylene blue under visible light irradiation, the as-prepared TiO2-x-yNxFy exhibits higher activity than the undoped TiO2, N-doped TiO2 (TiO2-xNx), and F-doped TiO2 (TiO2-yFy). Based on the characterizations including XRD, Raman, FTIR, TEM, PLS, UV-vis DRS, N-2 adsorption-desorption isotherms, XPS and NH3-TPD, the synergetic promotions of N- and F-dopants incorporated into the TiO2 lattice are discussed based on the enhanced spectral response in visible region, oxygen vacancies, and surface acidic sites. Meanwhile, the supercritical treatment also promotes the activity owing to the increase in both the surface area and the crystallization degree of anatase, and the enhanced incorporation of N- and F-dopants into the TiO2 lattice. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据