Effect of Nb doping on morphology, crystal structure, optical band gap energy of TiO2 thin films

被引：37
|
作者：
Lee, Deuk Yong [1 ,2 ]
Park, Ju-Hyun [2 ]
Kim, Young-Hun [3 ]
Lee, Myung-Hyun [4 ]
Cho, Nam-Ihn [5 ]
机构：
[1] Daelim Univ, Dept Biomed Engn, Anyang 431715, South Korea
[2] Daelim Univ, Dept Mat Engn, Anyang 431715, South Korea
[3] Korea Aerosp Univ, Dept Mat Engn, Goyang 412791, South Korea
[4] Korea Inst Ceram Engn & Technol, Div Energy & Environm, Seoul 153801, South Korea
[5] Sun Moon Univ, Dept Elect Engn, Asan 336708, South Korea
来源：
CURRENT APPLIED PHYSICS | 2014年 / 14卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
Nb-doped TiO2; Electrospinning; Spin coating; Optical band gap energy; Photodegradation; ULTRASONIC SPRAY-PYROLYSIS; PHOTOCATALYTIC ACTIVITY; MICROSTRUCTURE; TRANSFORMATION; DEGRADATION; ANATASE; POWDERS;
D O I：
10.1016/j.cap.2013.12.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nb-TiO2 nanofibers and thin films were prepared using a sol-gel derived electrospinning and spin coating, respectively, by varying the Nb/Ti molar ratios from 0 to 0.59 to investigate the effect of Nb doping on morphology, crystal structure, and optical band gap energy of Nb-TiO2. XRD results indicated that Nb-TiO2 is composed of anatase and rutile phases as a function of Nb/Ti molar ratio. As the Nb/Ti molar ratio rose, the anatase to rutile phase transformation and the reduction in crystallite size occurred. The band gap energy of Nb-TiO2 was changed from 3.25 eV to 2.87 eV when the anatase phase was transformed to rutile phase with increasing the Nb doping. Experimental results indicated that the Nb doping was mainly attributed to the morphology, the crystal structure, the optical band gap energy of Nb-TiO2, and the photocatalytic degradation of methylene blue. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：421 / 427
页数：7
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