Effective Visible Light-Activated B-Doped and B,N-Codoped TiO<sub>2</sub> Photocatalysts

In, Su‐Il; Orlov, Alexander; Berg, Regina; Garcı́a, Felipe; Pedrosa-Jimenez, Sergio; Tikhov, Mintcho S.; Wright, Dominic S.; Lambert, Richard M.

doi:10.1021/ja0749237

Cited by 546 publications

(370 citation statements)

References 9 publications

(12 reference statements)

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“…To understand the effect of charge balance on the electronic structures, we balance the charge of N, C, and B with one H, two H, and three H atoms, respectively, which is reasonable because the doped TiO 2 materials were usually processed with amine solution [3][4][5], H 2 [6], or BH 3 atmosphere [20,21]. In the calculations, one O atom is replaced by N : H species, C : 2H species, and B : 3H species, respectively (see Table 2: Calculated bond lengths, lattice variation, and defect formation energies.…”

Section: Effect Of Charge Balance On the Electronic Structuresmentioning

confidence: 99%

“…In order to extend the photo response of TiO 2 into the visible region and enhance its photocatalytic activity, a great deal of effort has been made to lower its threshold energy for photoexcitation as well as improve the electronic properties of TiO 2 . One of the effective strategies is doping TiO 2 with nonmetallic elements, such as N [2][3][4][5][6][7][8][9][10], C [11][12][13][14], S [15][16][17][18][19], and B [20][21][22][23], all of which showed considerable photocatalytic activity under visible light.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂

Jin

Dai

et al. 2012

International Journal of Photoenergy

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The origin of visible light absorption and photocatalytic activity of nonmetal doped anatase TiO 2 were investigated in details in this work based on density functional theory calculations. Our results indicate that the electronegativity is of great significance in the band structures, which determines the relative positions of impurity states induced by the doping species, and further influences the optical absorption and photocatalytic activities of doped TiO 2 . The effect of charge balance on the electronic structure was also discussed, and it was found that the charge-balance structures may be more efficient for visible light photocatalytic activities. In addition, the edge positions of conduction band and valence band, which determine the ability of a semiconductor to transfer photoexcited electrons to species adsorbed on its surface, were predicted as well. The results may provide a reference to further experimental studies.

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Section: Effect Of Charge Balance On the Electronic Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂

Jin

Dai

et al. 2012

International Journal of Photoenergy

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“…These processes have been done with increasing the porosity and surface area [48], doping with metals [49] or nonmetals [50], and surface coupling with metals [51] or semiconductors [52]. While there is a great challenge and effort to explain the mechanism of photocatalytic enhancement observed in graphene-semiconductor composites, it is still unclear.…”

Section: Visible-light Photocatalysis Of Carbon-based Materialsmentioning

confidence: 99%

Graphene-Semiconductor Composites as Visible Light-Induced Photocatalyst

Yıldırım¹,

Öztürk²

2018

Visible-Light Photocatalysis of Carbon-Based Materials

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Graphene-based composites produced by the incorporation of graphene into suitable semiconductors doped with various metals enable to induce the unique properties of the graphene, such as extended light absorption range, charge separation, and so high dye adsorption capacity. Therefore, graphene-based composites can provide to enhance the overall photocatalytic performance of the base semiconductor under the visible-light, and to open up new pathways to high-performance photocatalyst for the future applications. This chapter of the book focuses on the structural and optical properties of the graphene-semiconductor-based composite structure. Furthermore, final photocatalytic properties of the graphene-based composites can be controlled by applying different synthesis routes. Common synthesis methods of the graphene-semiconductor composites such as sol-gel, solution mixing, in situ growth, hydrothermal growth, and solvothermal method are discussed on the resultant visible-light photocatalytic property of the these composites. At the same time, doping of the graphene-semiconductor material with metal ions also allows an improvement of the visible light-induced photocatalytic activity. Therefore, studies related with the effect of the dopant agent on the visible light photocatalytic activity are also reviewed in this chapter.

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“…Some papers have reported that B-doped TiO 2 powders obtained by a modified sol-gel method showed a red-shifted absorption spectrum [24,25], while other studies concern increase in the bandgap energy of TiO 2 upon doping when H 3 BO 3 was used as a boron precursor because of the decrease of the crystal size after incorporation of boron atoms [21]. According to Bettinelli et al [21], boron used as a titania dopant could favor the transformation of anatase to rutile.…”

Section: Introductionmentioning

confidence: 99%

Optimization of boron-doping process of titania nanotubes via electrochemical method toward enhanced photoactivity

Szkoda

Lisowska-Oleksiak

Siuzdak

2016

J Solid State Electrochem

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In this work, we were focused on the development of the electrochemical approach resulting in a stable boron doping of titania nanotubes. The doping procedure concerns anodic polarization of as-anodized titania in a H 3 BO 3 solution acting as n boron precursor. The series of attempts were taken in order to elaborate the most beneficial doping conditions. The parameters of electrochemical doping allowing to obtain boron-doped titania characterized by the highest photoconversion efficiency are as follows: reaction voltage 1.8 V, process duration 0.5 h, and the concentration of boric acid 0.5 M. Spectroscopy techniques such as UV-vis, X-ray diffraction, photoluminescence emission, and X-ray photoelectron spectroscopy were used to characterize the absorbance capability and the crystalline phase, to confirm the presence of boron atoms and to study the nature of chemical compounds, respectively. The well-ordered structure of titania and resistance of its morphology toward electrochemical treatment in H 3 BO 3 were confirmed by scanning electron microscopy images. However, cyclic voltammetry and electrochemical impedance spectroscopy studies showed the significant difference in conductivity and capacitance between doped and pristine titania. Moreover, the photocurrent densities of the B-doped sample were about seven times higher in comparison with those generated by the pure titania nanotube electrode.

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Effective Visible Light-Activated B-Doped and B,N-Codoped TiO₂ Photocatalysts

Cited by 546 publications

References 9 publications

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂

Graphene-Semiconductor Composites as Visible Light-Induced Photocatalyst

Optimization of boron-doping process of titania nanotubes via electrochemical method toward enhanced photoactivity

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Effective Visible Light-Activated B-Doped and B,N-Codoped TiO2 Photocatalysts

Cited by 546 publications

References 9 publications

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO2

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO2

Graphene-Semiconductor Composites as Visible Light-Induced Photocatalyst

Optimization of boron-doping process of titania nanotubes via electrochemical method toward enhanced photoactivity

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Product

Resources

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Effective Visible Light-Activated B-Doped and B,N-Codoped TiO₂ Photocatalysts

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂

Effect of Electronegativity and Charge Balance on the Visible-Light-Responsive Photocatalytic Activity of Nonmetal Doped Anatase TiO₂