Photocatalytic properties of phosphor-doped titania nanoparticles

Li, Lin; Lin, Wei; Xie, Jinglin; Zhu, Yuelin; Zhao, Bin; Xie, Yongbing

doi:10.1016/j.apcatb.2007.03.016

Cited by 159 publications

(101 citation statements)

References 29 publications

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“…In addition, the interaction between P impurities and surface oxygen vacancies have a positive effect on photocatalytic activity under visible light，by consideration of their electronic structures. Our theoretical analysis provides a possible explanation for the modification of band gap reported by different experiments with P anion and cation doping [14][15][16][17].…”

Section: Cr-dopingmentioning

confidence: 93%

“…Certainly, S can also be doped in an ionic state into TiO 2 to give photocatalytic activity under visible light irradiation [13]. Recently, Lin et al reported that P-cation doped anatase TiO 2 nanoparticles had high photocatalytic activity with respect to pure samples under visible light [14]. The impurity was shown to be in a pentavalent-oxidation state (P 5+ ) according to XPS and with the form of Ti-O-P as identified by FT-IR.…”

Section: Cr-dopingmentioning

confidence: 99%

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Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles

Long

English

2009

J. Phys. Chem. C

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Abstract:The energetic and electronic properties of various P doping configurations at the rutile TiO 2 (110) surface are investigated by first-principles density functional theory (DFT) calculations. Several substitution and adsorption configurations for P impurities at the surface and the subsurface are considered. The stability of the P-doped systems is compared on the basis of the calculated formation energy and adsorption energy. Our calculated results indicate that the P impurities replace surface Ti atoms preferentially under O-rich growth conditions，and surface O atoms under Ti-rich conditions. In addition, it was found that the creation of oxygen vacancies favors P incorporation at substitution sites but not at adsorption sites. Doping with a single P atom into an O site may lead to either anionic or cationic states in the dopant.This causes either band-to-band transitions or introduces gap states to band transitions, with the former corresponding to a small band gap narrowing or broadening and the latter resulting in obvious reductions of photon transition energy. Substitutional replacement of Ti atoms by P atoms and adsorption on the surface (P-cation doping) 1 This document is the Accepted Manuscript version of a Published Work that appeared in final form in ournal of Physical Chemistry C, 113 : 9423-9430, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jp9016135 results in either a small band reduction or a slight band gap enlargement, depending on the doping sites. It is speculated that the interaction between P impurities and surface oxygen vacancies will lead to further enhanced photocatalytic activity in the visible light region.

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Section: Cr-dopingmentioning

confidence: 93%

Section: Cr-dopingmentioning

confidence: 99%

Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles

Long

English

2009

J. Phys. Chem. C

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“…3a), which is not observed in blank TiO 2 . Meanwhile, considering the fact that no peaks corresponding to the P-O vibrations appeared in the range of 900 to 1000 cm −1 in H 3 PO 4 aqueous solution (1000 cm −1 ), it is reasonable to conclude that a small part of phosphorus species was introduced into the framework of TiO 2 forming Ti-O-P bond (1035 cm −1 ) [19]. The bands at 1089, 1151, 1280, and 1115 cm −1 suggest that different chemical environments existed around the phosphorus after precipitation process.…”

Section: Ft-ir Studiesmentioning

confidence: 99%

Chemical modification of TiO2 by H2PO4−/HPO42− anions using the sol-gel route with controlled precipitation and hydrolysis: enhancing thermal stability

Elghniji

Saad

Araissi

et al. 2014

Materials Science-Poland

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Two titanium phosphate materials (T p P and T h P) have been successfully synthesized by sol-gel route with controlled precipitation and hydrolysis. The T p P material was obtained from the reaction between precipitated titania and phosphate buffer solution H 2 PO − 4 /HPO 2− 4 (pH = 7.3). The T h P material was prepared through hydrolysis of titanium in the presence of H 2 PO − 4 /HPO 2 4 . The probable state of the phosphate anions in titania framework and their effect on the anatase-to-rutile transformation were characterized by ICP-AES, DTA-TG, 31 P NMR, FT-IR, and Raman analysis HRTEM/SEM. FT-IR and 31 P NMR analyses of titanium phosphate T p P calcined at low temperature showed that the phosphate species existed not only as Ti-O-P in the bulk TiO 2 but also as amorphous titanium phosphates, including bidentate Ti(HPO 4 ) 2 and monodentate Ti(H 2 PO 4 ) 4 . Increased calcination temperature only gave an enrichment of bidentate structure on the titania surface. For the T h P material, H 2 PO − 4 /HPO 2− 4 anions were introduced into the initial solution, before precipitation, what promoted their lattice localization. At high temperatures, all the phosphorus inside the bulk of TiO 2 migrated to the surface. The Raman analysis of both samples showed that the bidentate phosphates increased the temperature of the anatase-to-rutile phase transformation to more than 1000°C with the formation of well crystalline TiP 2 O 7 phase. This phenomenon was more evident for T p P sample.

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“…According to literature survey, among non-metals, phosphorus (P) doping [17] is found to be most photocatalytic activity of TiO2 due to increase in the surface area and stabilizing anatase [18][19][20] structure. Whereas in metals cobalt (Co) doping decreases the electronhole pair recombination rate and acts as electron trap [21,22] enhances the photocatalytic activity [23]. Hence, in the present investigation phosphorus (P) and cobalt (Co) have been selected for the synthesis of P,Co-codoped TiO2 nanomaterial by using sol-gel method.…”

Section: Introductionmentioning

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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Photocatalytic properties of phosphor-doped titania nanoparticles

Cited by 159 publications

References 29 publications

Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles

Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles

Chemical modification of TiO2 by H2PO4−/HPO42− anions using the sol-gel route with controlled precipitation and hydrolysis: enhancing thermal stability

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

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Photocatalytic properties of phosphor-doped titania nanoparticles

Cited by 159 publications

References 29 publications

Energetic and Electronic Properties of P Doping at the Rutile TiO2 (110) Surface from First Principles

Energetic and Electronic Properties of P Doping at the Rutile TiO2 (110) Surface from First Principles

Chemical modification of TiO2 by H2PO4−/HPO42− anions using the sol-gel route with controlled precipitation and hydrolysis: enhancing thermal stability

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

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Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles

Energetic and Electronic Properties of P Doping at the Rutile TiO₂ (110) Surface from First Principles