Synthesis and characterization of phosphor and nitrogen co-doped titania

Li, Lin; Zheng, Renyang; Xie, Jinglin; Zhu, Yuelin; Xie, Yongbing

doi:10.1016/j.apcatb.2007.05.023

Cited by 146 publications

(76 citation statements)

References 50 publications

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“…Therefore, several strategies have been developed to shift the optical sensitivity of TiO 2 from UV to the visible-light region for the efficient use of solar energy, such as element doping, metal deposition, surface sensitization, and coupling of composite semiconductors [8][9][10][11] . Recently, co-doped titania with double non-metal 12,13 , metal-nonmetal elements [14][15][16][17] and double metal ions 18 have been attracted more attention, which could further improve the photocatalytic activity of TiO 2 . Among these, co-doping with transition metal and nonmetal elements such as Fe-N, V-N and W-C could effectively modify the electronic structures of TiO 2 and shift its absorption edge to a low energy 16 .…”

Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

et al. 2016

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“…It is clear that the presence of phosphorus in the TiO 2 matrix delays the transformation of amorphous TiO 2 into crystalline anatase. A longer crystallization delay is observed on increasing the phosphorus loading [5] [27]. Nevertheless, the nature of solvent (2-methoxyethanol or isopropanol) has no influence on the TiO 2 crystalliza- tion temperature; 2) even after calcination at 650˚C, no rutile phase is detected in P-doped TiO 2 xerogels, contrarily to the sample Met-TiO 2 , for which the rutile phase is detected when calcined at 650˚C [15].…”

Section: Thermal Evolution Of Pure Tio2 and P-doped Tio2 Xerogelsmentioning

confidence: 90%

P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

Bodson¹,

Pirard²,

Pirard³

et al. 2014

MSCE

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In the present study, sol-gel process is used to synthesize P-doped TiO2 xerogels by the cogelation method of a functionalized P alkoxide, (NH2-(CH2)2-NH-(CH2)2-P(O)-(OC2H5)2) with Ti(OC3H7)4 in either 2-methoxyethanol or isopropanol. The phosphorus-doping improved the thermal stability of titania and decreased the phase transformation of anatase into rutile. This modification by phosphorus shifted the absorption edge of titania to the visible region as proved by Diffuse reflectance measurements, and thus offers the possibility to produce visible light effective TiO2 photocatalyst. The excellent photocatalytic activity of P-doped TiO2 xerogels compared to pure TiO2 could be explained by its high surface area and small TiO2-anatase crystallite size. From these results, it was proved by using three different models that phosphorus intrinsically influences the photocatalytic activity.

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“…Similar shift was also observed in O 1s peak with increase in the dopant content. The shift of both O 1s, Ti 2p 3/2 in the binding energy indicates the increase of the electron densities on the Ti atom suggesting that some Ti 3+ species may exist in all the four samples [30]. Miao et al and Jagadale et al have also assigned these shifted peaks to TiO 2−x N x [31].…”

Section: Xps Analysismentioning

confidence: 99%

Polymorphic phase transformation of Degussa P25 TiO2 by the chelation of diaminopyridine on TiO62− octahedron: Correlation of anatase to rutile phase ratio on the photocatalytic activity

Rajashekhar

Devi

2013

Journal of Molecular Catalysis A: Chemical

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a b s t r a c tA series of nitrogen-doped Degussa P25 photocatalysts were synthesized successfully by grinding and calcination method using 2,6-diaminopyridine (DAP) as a nitrogen precursor. The prepared samples were characterized by various analytical methods. The phase contents of anatase and rutile in the Degussa P25 powders have been altered by simply changing the proportion of DAP. A mechanism involving chelated DAP molecule on TiO 6 2− octahedron is discussed. The enhanced activity is attributed to synergistic effect in the two phase solid material. Due to the low activation barrier, the effective inter particle electron transfer between the two polymorphs is quite efficient only when they are in close proximity with similar crystallite sizes. The transfer of electrons from the rutile phase to lattice/electron trapping sites of anatase and also to the Ti 3+ -V o defect level created by the dopant favors effective charge separation and enhance the photocatalytic activity under solar illumination.

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Synthesis and characterization of phosphor and nitrogen co-doped titania

Cited by 146 publications

References 50 publications

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

Polymorphic phase transformation of Degussa P25 TiO2 by the chelation of diaminopyridine on TiO62− octahedron: Correlation of anatase to rutile phase ratio on the photocatalytic activity

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