Effect of Nitrogen Doping on Optical and Photocatalytic Properties of TiO2 Thin Film Prepared by Spin Coating Process

Mekprasart, Wanichaya; Khumtong, Thanakorn; Rattanarak, Jiravat; Techitdheera, Wicharn; Pecharapa, Wisanu

doi:10.1016/j.egypro.2013.06.809

Cited by 31 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nitrogen doping reduces the bandgap of rutile TiO 2 as well, whereas no midbandgap state is induced as for the Carbon interstitial doping case. N doping should therefore lead to an increase in photocatlytic efficiency which again has shown by several experiments [42][43][44]. Looking at the calculated phase diagram, there is also a wide range of partial oxygen pressures where subtstitutional N doping shows to be energetically preferable, in contrast to Carbon.…”

Section: Resultsmentioning

confidence: 84%

See 1 more Smart Citation

The electronic and magnetic structure of p-element (C,N) doped rutile-TiO2; a hybrid DFT study

Atanelov

Gruber

Mohn

2015

Computational Materials Science

View full text Add to dashboard Cite

a b s t r a c tWe study the electronic and magnetic structure of carbon and nitrogen impurities and interstitials in rutile TiO 2 . To this end we perform ab initio calculations of a 48-atom supercell employing the VASP code. In order to obtain a realistic description of the electronic and magnetic structure, exchange and correlation are treated with the HSE06 hybrid functional. Both, atomic positions and cell dimensions are fully relaxed. Substitutional carbon and nitrogen are found to have a magnetic moment of 2 and 1l B , respectively, with a tendency for anti-ferromagnetic long range order. For C/N on interstitial sites we find that carbon is non-magnetic while nitrogen always possesses a magnetic moment of 1l B . We find that these interstitial positions are on a saddle point of the total energy. The stable configuration is reached when both carbon and nitrogen form a C-O and N-O dimer with a bond length close to the double bond for CO and NO. This result is in agreement with earlier experimental investigations detecting such N-O entities from XPS measurements. The frequencies of the symmetric stretching mode are calculated for these dimers, which could provide a means for experimental verification. For all configurations investigated both C and N states are found inside the TiO 2 gap. These new electronic states are discussed with respect to tuning doped TiO 2 for the application in photocatalysis.

show abstract

Section: Resultsmentioning

confidence: 84%

“…Once the CO and NO dimers are formed, nitrogen remains with 1l B while carbon is non-magnetic. Test [42][43][44][45][46].…”

Section: C/n-interstitialmentioning

confidence: 99%

The electronic and magnetic structure of p-element (C,N) doped rutile-TiO2; a hybrid DFT study

Atanelov

Gruber

Mohn

2015

Computational Materials Science

View full text Add to dashboard Cite

show abstract

“…So far, the development of TiO 2 coatings with improved photoactive and photoelectrochemical properties has primarily concentrated on the methods to synthesize the TiO 2 coating, [27,34,58] the optimization of the following heat treatments [32] or the doping of the coatings [56,59,60]. However, as mentioned above, also the selection of the substrate material plays a key role with respect to the properties of the coating.…”

Section: Photoelectrochemical Properties Of the Coatingsmentioning

confidence: 98%

Enhanced photoactive and photoelectrochemical properties of TiO2 sol–gel coated steel by the application of SiO2 intermediate layer

Nikkanen¹,

Huttunen-Saarivirta²,

Salminen³

et al. 2015

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

“…In the case of the TiO 2 modification with nitrogen and carbon, the observed increase of the photocatalytic activity of the material is explained by the inhibition of the photoinduced electrons and holes recombination process [33,34] and by the reduction of the energy required in the photocatalyst excitation [35]. Moreover, it is worth pointing out that the content of the dopants in TiO 2 lattice also impacts photocatalytic properties of TiO 2 [36]. For example, the high content of nitrogen in TiO 2 lattice influences the shifting of stable titania phase towards rutile [37].…”

Section: Photocatalyst Characteristicsmentioning

confidence: 99%

Induced self-cleaning properties towards Reactive Red 198 of the cement materials loaded with co-modified TiO2/N,C photocatalysts

Janus

Bubacz

Zatorska

et al. 2014

Reac Kinet Mech Cat

View full text Add to dashboard Cite

The possibility of promoting the self-cleaning properties of the cement materials was verified by implementing the obtained nitrogen and carbon comodified titania-based (TiO 2 /N,C) photocatalysts into the cement plates. Additionally, unmodified TiO 2 (Grupa Azoty Zakłady Chemiczne POLICE S.A., Poland) and a commercial photocatalyst P25 (Evonik Industries AG, Germany) were used as reference materials. The impact of treatment temperature on the physicochemical properties of the obtained TiO 2 /N,C additives was discussed. The photocatalytic activity of the prepared cement plates was evaluated trough the degradation of a model organic compound (Reactive Red 198) under UV-vis light. It was found that cement plates containing TiO 2 /N,C photocatalyst calcined at 600°C temperature exhibited the highest photocatalytic activity. The role of several factors such as crystallinity, phase composition and non-metals presence in the TiO 2 /N,C additives on the self-clearing properties of the cement samples was also included in the discussion.

show abstract

Effect of Nitrogen Doping on Optical and Photocatalytic Properties of TiO2 Thin Film Prepared by Spin Coating Process

Cited by 31 publications

References 15 publications

The electronic and magnetic structure of p-element (C,N) doped rutile-TiO2; a hybrid DFT study

The electronic and magnetic structure of p-element (C,N) doped rutile-TiO2; a hybrid DFT study

Enhanced photoactive and photoelectrochemical properties of TiO2 sol–gel coated steel by the application of SiO2 intermediate layer

Induced self-cleaning properties towards Reactive Red 198 of the cement materials loaded with co-modified TiO2/N,C photocatalysts

Contact Info

Product

Resources

About