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题名: Enhanced photocatalytic activity for the degradation of rhodamine B by TiO2 modified with Gd2O3 calcined at high temperature
作者: Zhang, Jing1;  Wu, Weicheng1;  Yan, Song1;  Chu, Gang1;  Zhao, Shanlin1;  Wang, Xiang2;  Li, Can2
关键词: Gd2O3 surface modified TiO2 ;  Surface phase junction ;  UV Raman spectroscopy ;  Photocatalysis
刊名: APPLIED SURFACE SCIENCE
发表日期: 2015-07-30
DOI: 10.1016/j.apsusc.2015.03.078
卷: 344, 页:249-256
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Coatings & Films ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Materials Science ;  Physics
英文摘要: TiO2 modified with Gd2O3 (Gd/TiO2) nanoparticles were prepared by an impregnation method using TiO2-500 degrees C support (anantase phase) or TiO2-650 degrees C support (mixed phases of anatase and rutile), respectively. The surface and bulk crystalline phases of Gd/TiO2 have been characterized by UV Raman spectroscopy and XRD. Besides, the morphology, particle size, and the optical properties of Gd/TiO2 have been studied by TEM, BET, and UV-visible diffuse reflectance spectra. It is interesting to note that the surface crystalline phase (surface anatase phase or surface mixed phases) of TiO2 which has been impregnated with Gd2O3 can be stabilized after calcination at 800 degrees C. This work provides a promising method for controlling the surface phase, crystallinity, and particle size of TiO2 at high temperatures. Moreover, photocatalytic activity of Gd/TiO2 has been evaluated by degradation of rhodamine B and 4-chlorophenol in aqueous solution under UV irradiation. It is found that Gd/TiO2 exhibits good photocatalytic activity compared to pure TiO2. The higher photocatalytic activity of Gd/TiO2 is mainly attributed to an increase in the anatase crystallinity, an increase in photoinduced charge separation, which induced by surface phase junction, and to an increase in the extent of its optical absorption spectrum, as compared to TiO2. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: DOPED TIO2 ;  PHASE-TRANSFORMATION ;  HETEROGENEOUS PHOTOCATALYSIS ;  PHOTOCHEMICAL PROCESSES ;  TITANIUM-DIOXIDE ;  SURFACE ;  NANOPARTICLES ;  INTERFACE ;  OXIDATION ;  FILMS
语种: 英语
WOS记录号: WOS:000353802600034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146205
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Liaoning 113001, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Zhang, Jing,Wu, Weicheng,Yan, Song,et al. Enhanced photocatalytic activity for the degradation of rhodamine B by TiO2 modified with Gd2O3 calcined at high temperature[J]. APPLIED SURFACE SCIENCE,2015,344:249-256.
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