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题名: Effect of Nd2O3 addition on the surface phase of TiO2 and photocatalytic activity studied by UV Raman spectroscopy
作者: Yuan, Mengqiong1;  Zhang, Jing1;  Yan, Song1;  Luo, Genxiang1;  Xu, Qian2;  Wang, Xiang2;  Li, Can2
关键词: TiO2 modified with Nd2O3 ;  Co-precipitation method ;  Surface crystal phase ;  UV Raman spectroscopy ;  Photocatalysis
刊名: JOURNAL OF ALLOYS AND COMPOUNDS
发表日期: 2011-05-26
DOI: 10.1016/j.jallcom.2011.03.010
卷: 509, 期:21, 页:6227-6235
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, Multidisciplinary ;  Metallurgy & Metallurgical Engineering
研究领域[WOS]: Chemistry ;  Materials Science ;  Metallurgy & Metallurgical Engineering
英文摘要: TiO2 modified with Nd2O3 (Nd-TiO2) nanoparticles were prepared by a co-precipitation method and utilized as the photocatalysts for the degradation of Rhodamine B (RhB). The influence of Nd2O3 on the bulk and surface phase, surface area, particle size, and optical response of TiO2 was investigated by X-ray diffraction (XRD), UV Raman spectroscopy, transmission electron microscopy (TEM), BET, and UV-visible diffuse reflectance spectra. It is found that the crystalline phase and phase composition in the bulk and surface region of Nd-TiO2 calcined at high temperatures can be tuned by changing the amount of Nd2O3. Based on the results from XPS, EDX, XRD, and UV Raman spectra, it is assumed that Nd3+ ions do not enter the TiO2 lattice, but highly disperse onto the Nd-TiO2 particle surface in the form of Nd2O3 crystallites. These crystallites inhibit the agglomeration, growth in crystal size, and anatase-to-rutile phase transformation of TiO2. In the photocatalytic degradation of RhB reaction, Nd-TiO2 nanoparticles with higher surface area and wider optical response are more reactive in case of the same surface anatase phase. When the mixed phases of anatase and rutile exist in the surface region of Nd-TiO2, the synergetic effect over surface area and optical response is the important parameter which determines optimal photocatalytic activity. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
关键词[WOS]: SOL-GEL METHOD ;  DOPED TIO2 ;  NANOPARTICLES ;  DEGRADATION ;  ANATASE ;  RUTILE ;  TRANSFORMATION ;  CALCINATION ;  POWDERS ;  SIZE
语种: 英语
WOS记录号: WOS:000290441700020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142396
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, Sch Chem & Mat Sci, Fushun 113001, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Yuan, Mengqiong,Zhang, Jing,Yan, Song,et al. Effect of Nd2O3 addition on the surface phase of TiO2 and photocatalytic activity studied by UV Raman spectroscopy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2011,509(21):6227-6235.
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