Influence of transition metal doping on the structural, optical, and magnetic properties of TiO2 films deposited on Si substrates by a sol-gel process.
TLDR
It is found that the magnetizations of the TM-doped TiO2 films decrease with increasing dopant content, which is related to electric disorder due to the ART.Abstract:
Transition metal (TM)-doped TiO2 films (TM = Co, Ni, and Fe) were deposited on Si(100) substrates by a sol–gel method. With the same dopant content, Co dopants catalyze the anatase-to-rutile transformation (ART) more obviously than Ni and Fe doping. This is attributed to the different strain energy induced by the different dopants. The optical properties of TM-doped TiO2 films were studied with spectroscopic ellipsometry data. With increasing dopant content, the optical band gap (EOBG) shifts to lower energy. With the same dopant content, the EOBG of Co-doped TiO2 film is the smallest and that of Fe-doped TiO2 film is the largest. The results are related to electric disorder due to the ART. Ferromagnetic behaviors were clearly observed for TM-doped TiO2 films except the undoped TiO2 film which is weakly magnetic. Additionally, it is found that the magnetizations of the TM-doped TiO2 films decrease with increasing dopant content.read more
Citations
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References
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Photocatalytic activity of TiO2 films with mixed anatase and rutile structures prepared by pulsed laser deposition
Lei Zhao,Mandi Han,Jianshe Lian +2 more
TL;DR: In this paper, a pulsed laser ablated titanium (99.99%) target was placed onto quartz glass substrates at 700°C in an oxygen pressure of 10Pa and the as-deposited films were then annealed at 800°C for different time to produce films with mixed anatase and rutile structures.
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Preparation and phase transformation of anatase–rutile crystals in metal doped TiO2/muscovite nanocomposites
TL;DR: In this paper, the anatase-rutile (A-R) transformation was studied by scanning electronic microscopy (SEM) and X-ray diffraction (XRD), respectively.
Journal ArticleDOI
One step preparation of visible-light responsive Fe–TiO2 coating photocatalysts by MOCVD
Xingwang Zhang,Lecheng Lei +1 more
TL;DR: In this article, the results of XRD revealed that the doping of Fe 3+ into TiO 2 accelerated anatase-rutile phase transition, and the optimum deposition temperature was found to be 873 K. The Fe doped samples exhibited good photocatalytic activities for the degradation of an azo dye.
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Structural, magnetic and optical properties of Ni-doped TiO2 thin films deposited on silicon(1 0 0) substrates by sol–gel process
Jianjun Tian,Jianjun Tian,Huiping Gao,Hongmei Deng,Lin Sun,Hui Kong,Pingxiong Yang,Junhao Chu +7 more
TL;DR: In this paper, Ni doping catalyzes the anatase-to-rutile transformation (ART) of TiO 2 films, which is due to the decrease of the ART activation energy.