Study of effect annealing temperature on the structure, morphology and photocatalytic activity of Si doped TiO2 thin films deposited by electron beam evaporation

Lu, Zhongdan; Jiang, Xiaohong; Zhou, Bing; Wu, Xiaodong; Lu, Lude

doi:10.1016/j.apsusc.2011.07.085

Cited by 59 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After deconvolution, two O 1s peaks centered at 529.3 and 531.1 eV, respectively, are shown. The peak centered at 529.3 eV is associated with the lattice oxygen atoms of TiOTi bond, whereas the peak at 531.1 eV is associated with the oxygen defects in the matrix of TiO 2 caused by oxygen vacancy . The peak area percentages for lattice oxygen atoms and oxygen vacancy are 48.7% and 51.3%, respectively.…”

Section: Resultsmentioning

confidence: 98%

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Chen

Wei

Yuan

et al. 2017

Adv Funct Materials

View full text Add to dashboard Cite

TiO 2 is a very promising photocatalytic material due to its merits including low cost, nontoxicity, high chemical stability, and photocorrosion resistance. However, it is also known that TiO 2 is a wide bandgap material, and it is still challenging to achieve high photocatalytic performance driven by solar light. In this paper, silicon-doped TiO 2 nanorod arrays are vertically grown on fluorine-doped tin oxide substrates and then are heat treated both in air and in vacuum. It is found that the silicon doping together with the heat treatment brings synergic effect to TiO 2 nanorod films by increasing the crystallinity, producing abundant oxygen vacancies, enhancing the hydrophilicity as well as improving the electronic properties. When used as photoanodes in photoelectrochemical water splitting, under the condition of AM 1.5G simulated solar irradiation and without using any cocatalysts, these nanorod films show photocurrent density as high as 0.83 mA cm −2 at a potential of 1.23 V versus reversible hydrogen electrode, which is much higher than that of the TiO 2 nanorod films without doping or heat treating. The silicon-doped TiO 2 nanorod array films described in this paper are envisioned to provide valuable platforms for supporting catalysts and cocatalysts for efficient solar-light-assisted water oxidation and other solar-light-driven photocatalytic applications.

show abstract

Section: Resultsmentioning

confidence: 98%

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Chen

Wei

Yuan

et al. 2017

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The out‐diffusion of Si atoms from the quartz substrate into the TiO 2 film may contribute to an enhancement of the photocatalytic effect as the Si atoms were reported to act as a transfer bridge for electrons and holes for the diffusion of photogenerated electron‐hole pairs to the film surface . In addition, Si‐doped TiO 2 films were reported to show a reduction in electron and holes recombination rate due to a shift in the conduction and valence band position . With the reduction in recombination rate, faster degradation of methyl orange and rhodamine B have been reported …”

Section: Resultsmentioning

confidence: 99%

Effect of Annealing Temperature on Microstructure and UV Light Photocatalytic Activity of TiO₂ Films Grown by Atmospheric Pressure CVD

Chua

Fang

Chen

et al. 2013

Chemical Vapor Deposition

View full text Add to dashboard Cite

Titanium dioxide (TiO 2 ) films are deposited on quartz substrates by atmospheric pressure (AP)CVD, and then annealed under simulated air (80% nitrogen, 20% oxygen) at temperatures from 600 to 900°C to investigate the change in microstructure and the effect on the photocatalytic activity on the simulated pollutant stearic acid. The as-deposited TiO 2 film is mainly composed of pure anatase phase while the rutile phase is detected only after annealing the film at 900°C for 1 h. The photocatalytic activity of the annealed films on stearic acid under UV irradiation is found to deteriorate after the films are annealed at temperatures above 700°C. This decrease in photocatalytic performance is observed to be the result of two possible mechanisms induced by the annealing temperature. The first mechanism is the increase in defect concentration (O À and Ti vacancies) in the annealed TiO 2 films for annealing temperatures below 800°C, and the second mechanism is the formation of large rutile grains at a higher temperature, 900°C.

show abstract

“…The binding energy of Ti 2p peak for AHFSTiO 2 (20) is 464.60 eV, which is 0.64 eV greater than that of pure TiO 2 . The electronegativity of Si is greater than that of Ti, which causes decrease of electron density around Ti atom and effective positive charge on the Si atoms [8,19]. Therefore, presence of silicon species in AHFS- …”

Section: Xps Analysismentioning

confidence: 94%

Photocatalytic activity of TiO2 nanoparticles synthesized in presence of ammonium hexafluorosilicate

Seyghali

Zanjanchi

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

Study of effect annealing temperature on the structure, morphology and photocatalytic activity of Si doped TiO2 thin films deposited by electron beam evaporation

Cited by 59 publications

References 31 publications

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Effect of Annealing Temperature on Microstructure and UV Light Photocatalytic Activity of TiO₂ Films Grown by Atmospheric Pressure CVD

Photocatalytic activity of TiO2 nanoparticles synthesized in presence of ammonium hexafluorosilicate

Contact Info

Product

Resources

About

Study of effect annealing temperature on the structure, morphology and photocatalytic activity of Si doped TiO2 thin films deposited by electron beam evaporation

Cited by 59 publications

References 31 publications

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO2 Nanorod Arrays

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO2 Nanorod Arrays

Effect of Annealing Temperature on Microstructure and UV Light Photocatalytic Activity of TiO2 Films Grown by Atmospheric Pressure CVD

Photocatalytic activity of TiO2 nanoparticles synthesized in presence of ammonium hexafluorosilicate

Contact Info

Product

Resources

About

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Synergistic Effect of Si Doping and Heat Treatments Enhances the Photoelectrochemical Water Oxidation Performance of TiO₂ Nanorod Arrays

Effect of Annealing Temperature on Microstructure and UV Light Photocatalytic Activity of TiO₂ Films Grown by Atmospheric Pressure CVD