Photocatalytic abilities of gel-derived P-doped TiO2

Yu, Hsuan‐Fu

doi:10.1016/j.jpcs.2007.01.050

Cited by 71 publications

(33 citation statements)

References 18 publications

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“…The optimal P value of 0.06 approximately corresponds to the maximum photocatalytic activity observed in Figure 7. Those results are in agreement with literature that places the optimal P value between 0.05 and 0.1 [29] [31]. So Equation (6) and Equation (7) describe d a and S BET as a function of P only, according to a second degree relation.…”

Section: Parameter Adjustmentsupporting

confidence: 92%

“…The presence of phosphorus stabilizes the anatase structure, which is very interesting since anatase is the most effective structure of TiO 2 in photocatalysis. Previously, H 3 PO 4 -doped TiO 2 xerogels were reported and in this case, the rutile structure is obtained for temperatures > 900˚C with a molar P/Ti ratio of 0.05, and >1000˚C with a molar P/Ti ratio of 0.1 to 0.5 [29].…”

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

confidence: 64%

“…The explanation comes from the dependence of d a and S BET on P. Figure 7 represents the experimental photocatalytic activity A as a function of P. A second degree expression corresponding to Model 1 and passing through a maximum is adjusted. According to Yu et al [29], the maximum can be explained by the fact that a too high P value improves the formation of TiP 2 O 7 species inhibiting the TiO 2 photocatalytic activity.…”

Section: Parameter Adjustmentmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Parameter Adjustmentsupporting

confidence: 92%

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

confidence: 64%

Section: Parameter Adjustmentmentioning

confidence: 99%

See 1 more Smart Citation

P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

Bodson¹,

Pirard²,

Pirard³

et al. 2014

MSCE

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“…5(a) and (b) show typical scanning electron microscopic images of undoped and 0.75 wt% of P 5+ and 0.25 wt% of Co 2+ co-doped TiO2 (PCT1) indicated these particles are in spherical shape, smooth surface and little agglomeration. From the SEM results it can be concluded that agglomeration and particle sizes are decreased [36] greatly in PCT1 due to codoping of P and Co into TiO2 lattice and their presence was confirmed by EDX analysis Fig. 5(d).…”

Section: Scanning Electron Microscopy -Energy Dispersive X-ray Studiesmentioning

confidence: 74%

“…From these results decrease in crystallite size was observed due to codoping of cobalt and phosphorus into TiO2 lattice. The variation in the particle size and the phase content demonstrated that P doping decreases the particle size, aggravate the unit cell distortion, retards the phase transformation of anatase to rutile [34] and the reducing atmosphere due to P-doping was more efficient in slowing down the crystal-growth rate in P, Co-codoped TiO2 [35,36]. The comparative results of pure TiO2, single doped, phosphorus and cobalt codoped crystallite size with codoped TiO2 are given in the Table 2.…”

Section: X-ray Diffraction Studies (Xrd)mentioning

confidence: 99%

Synergistic Effects of Phosphorus and Cobalt Binary Doping on Visible Light Activity of TiO2 by Sol-Gel Method and Evaluation of Photocatalytic Efficiency

Kumar¹,

Rao²,

Raju³

et al. 2018

JNST

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Phosphorus and cobalt codoped TiO2 nanomaterial was successfully prepared by single step sol-gel method by doping different weight percentages of dopants concentrations into TiO2 lattice. The codoped TiO2 samples were characterized to confirm the structural and morphological changes in TiO2 crystal lattice by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UVvis. DRS), X-ray photo electron spectroscopy (XPS), Brunauer-Emmmett-Teller surface area analyzer (BET) and Fourier transform infrared spectroscopy (FT-IR). The characterization results revealed that all the codoped samples show anatase phase, nanoparticle (5.8 nm) and narrow band gap (2.54 eV). These results enhance the photocatylytic activity of codoped TiO2 in visible light for the degradation of Fast Green dye within 60 min.

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Oxygen Rich Titania: A Dopant Free, High Temperature Stable, and Visible‐Light Active Anatase Photocatalyst

Etacheri

Seery²,

Hinder

et al. 2011

Adv Funct Materials

328

253

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The simultaneous existence of visible light photocatalytic activity and high temperature anatase phase stability up to 900 °C in undoped TiO2 is reported for the first time. These properties are achieved by the in‐situ generation of oxygen through the thermal decomposition of peroxo‐titania complex (formed by the precursor modification with H2O2). Titania containing the highest amount of oxygen (16 H2O2‐TiO2) retains 100% anatase phase even at 900 °C, where as the control sample exists as 100% rutile at this temperature. The same composition exhibits a six‐fold and two‐fold increase in visible light photocatalytic activities in comparison to the control sample and the standard photocatalyst Degussa P‐25 respectively. Among the various parameters affecting the photocatalytic action, such as band gap narrowing, textural properties, crystallite size, and anatase phase stability, band gap narrowing was identified as the major factor responsible for the visible light photocatalytic activity. Increased Ti–O–Ti bond strength and upward shifting of the valence band (VB) maximum, which is responsible for the high temperature stability and visible light activity respectively, are identified from FT–IR, XPS, and photoluminescence (PL) spectroscopic studies. It is therefore proposed that the oxygen excess defects present in these titania samples are responsible for the high temperature stability and enhanced visible light photocatalytic activities.

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Photocatalytic abilities of gel-derived P-doped TiO2

Cited by 71 publications

References 18 publications

P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts

Synergistic Effects of Phosphorus and Cobalt Binary Doping on Visible Light Activity of TiO2 by Sol-Gel Method and Evaluation of Photocatalytic Efficiency

Oxygen Rich Titania: A Dopant Free, High Temperature Stable, and Visible‐Light Active Anatase Photocatalyst

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