Metal ion and N co-doped TiO<sub>2</sub> as a visible-light photocatalyst

Sakatani, Yoshiaki; Ando, Hiroyuki; Okusako, Kensen; Koike, Hironobu; Nunoshige, Jun; Takata, Tsuyoshi; Kondo, Junko N.; Hara, Michikazu; Domen, Kazunari

doi:10.1557/jmr.2004.0269

Cited by 84 publications

(68 citation statements)

References 15 publications

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“…[59][60][61] Subsequently, nitrogen-doped TiO 2 has attracted considerable attention. [62][63][64] In fact, similar photocatalysts sensitive to visible light have already been reported in 1986.…”

Section: Visible-light-sensitive Tiomentioning

confidence: 99%

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Fukuda

Takagi

Asano

et al. 2012

Jpn. J. Appl. Phys.

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A smooth surface of the poly(3-hexylthiophene) (P3HT)-doped-(6,6)-phenyl-C61-butyric acid methyl ester (PCBM) thin film was achieved by mixing different solvents for the electrospray deposition method. As a result, the high power-conversion efficiency (PCE) of the bulk-heterojunction organic photovoltaic cell (OPV) was comparable to that obtained in the case of the spin-coating method. By optimizing the additional solvent in o-dichlorobenzene, the P3HT/PCBM active layer with the root-means-square roughness of 2.23 nm and the PCE of 2.2% was fabricated employing acetonitrile as the additional solvent.

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Section: Visible-light-sensitive Tiomentioning

confidence: 99%

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Fukuda

Takagi

Asano

et al. 2012

Jpn. J. Appl. Phys.

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“…Their effects on the properties of the doped samples have been reported. Some research groups attempted to modify TiO 2 such that it showed response to visible wavelength through the use of oxygen-vacant TiO 2 [12], nonmetal-doped TiO 2 [13,14], and metal-nonmetal codoped TiO 2 [15] particles that have significant photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Nahar¹,

Hasegawa

Kagaya

et al. 2007

Science and Technology of Advanced Materials

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Fe-doped TiO 2 particles responding to visible light were synthesized by impregnation and calcination method using TiO 2 particle and Ti element, respectively. The optical and the chemical properties were characterized by measuring the X-ray diffraction (XRD) and UV-visible spectroscopy. The onset of absorption shifted to longer wavelengths on doping TiO 2 by the calcination process, which showed a better response as compared to the impregnation method. The photocatalytic reactivity was evaluated by the degradation of phenol with impregnated Fe-doped (0.5% w/w in Fe) and calcined Fe-doped (Fe x Ti 1Àx O 2 , x ¼ 0.005 (Fe/Ti molar ratio)) TiO 2 separately in distilled and tap water. The characterization results have confirmed the advanced possibility of correlation between photoactivity and the special property of sulfur-containing calcined Fe-doped TiO 2 . In case of the coagulation of the undoped A-I and the Fe-doped B-I, the photoactivity showed a decrease due to the presence of natural electrolytes and due to the high pH of tap water, whereas in the case of the coagulation of calcined Fe-doped TiO 2 prepared from sulfides (Fe x TiS 2 ), the photoactivity showed an increase. In this study, highest catalytic activity was found to be strongly dependent both on catalyst structure and on the type of water used.

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“…co-doping with nitrogen and various metal ions, has been studied [26,27], and to a lesser extent carbon and tungsten co-doping [28].…”

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confidence: 99%

Carbon-Doped TiO₂ and Carbon, Tungsten-Codoped TiO₂ through Sol–Gel Processes in the Presence of Melamine Borate: Reflections through Photocatalysis

Neville¹,

Mattle

Loughrey³

et al. 2012

J. Phys. Chem. C

117

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A series of C-doped, W-doped, and C,W-codoped TiO2 samples have been prepared using modified sol–gel techniques. Reproducible inexpensive C-doping arises from the presence of melamine borate in a sol–gel mixture, whereas W-doping is from the addition of tungstic acid to the sol. The materials have been characterized using elemental analysis, N2 physisorption (BET), thermogravimetric analysis, X-ray diffraction, Raman, X-ray photoelectron, UV–vis spectroscopies, and photocatalytic activity measurements. Doping C and W independently results in an increased absorbance in the visible region of the spectrum with a synergistic effect in increased absorbance when both elements are codoped. The increased visible-light absorbance of the W-doped or codoped materials is not reflected in photocatalytic activity. Visible-light-induced photocatalytic activity of C-doped material was superior to that of an undoped catalyst, paving the way for its application under only visible-light irradiation conditions. A significant fraction of the spectral red shift commonly observed with doped catalysts might be due to the formation of color centers as a result of defects associated with oxygen vacancies, and bandgap-related narrowing or intragap localization of dopant levels are not the only factors responsible for enhanced visible-light absorption in doped photocatalysts. Furthermore, bandgap narrowing through increases in the energy of the valence band may actually decrease photo-oxidation activity through a curtailment of one route of oxidation.

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Metal ion and N co-doped TiO₂ as a visible-light photocatalyst

Cited by 84 publications

References 15 publications

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Carbon-Doped TiO₂ and Carbon, Tungsten-Codoped TiO₂ through Sol–Gel Processes in the Presence of Melamine Borate: Reflections through Photocatalysis

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Metal ion and N co-doped TiO2 as a visible-light photocatalyst

Cited by 84 publications

References 15 publications

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Comparative assessment of the efficiency of Fe-doped TiO2prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Carbon-Doped TiO2 and Carbon, Tungsten-Codoped TiO2 through Sol–Gel Processes in the Presence of Melamine Borate: Reflections through Photocatalysis

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Product

Resources

About

Metal ion and N co-doped TiO₂ as a visible-light photocatalyst

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Carbon-Doped TiO₂ and Carbon, Tungsten-Codoped TiO₂ through Sol–Gel Processes in the Presence of Melamine Borate: Reflections through Photocatalysis