Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Bai, Shouli; Liu, Haiyan; Sun, Jianhua; Tian, Ye; Chen, Song; Song, Jingli; Luo, Ruixian; Li, Dianqing; Liu, Chung Chiun

doi:10.1016/j.apsusc.2015.02.103

Cited by 141 publications

(53 citation statements)

References 46 publications

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“…5 In this context, the incorporation of other oxides, such as SiO 2 , ZrO 2 , WO 3 and Al 2 O 3 , into the TiO 2 structure has been widely studied. [6][7][8][9][10] It is well-known that the addition of SiO 2 to TiO 2 improves the specific surface area (SSA) of the modified material, thus, increasing the adsorption rate of organic pollutants. 11 In our previous work, 12 it was shown that the presence of SiO 2 inhibits the growth of the anatase crystals during TiO 2 calcination, retarding the transformation of anatase to rutile phase.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Resende

Gouveia

Oliveira

et al. 2017

J. Braz. Chem. Soc.

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An investigation on unusual interface properties of unprecedented ternary composites, formed by the inclusion of assorted proportions of B 2 O 3 into TiO 2 /SiO 2 structure, is conducted herein. The influences of B 2 O 3 content and calcination temperature were evaluated. The precursor TiO 2 /SiO 2 material was synthesized via a simple sol-gel procedure that was followed by B 2 O 3 inclusion via maceration and calcination. The materials were fully characterized and their photocatalytic performance to degrade the Indigo Carmine dye investigated. The material prepared with a B/Ti molar ratio of 1 and at calcination temperature of 350 °C (B 1-350 ) showed the best performance, with a superior photocatalytic activity than that of commercial TiO 2 . The presence of B 2 O 3 -TiO 2 -SiO 2 interfaces in the structure of such material was of critical importance in producing a material with these attractive features. Finally, high resolution mass spectrometry monitoring allowed for the characterization of the main degradation products formed under these conditions.

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Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Resende

Gouveia

Oliveira

et al. 2017

J. Braz. Chem. Soc.

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“…The electron acceptation by WO 3 was ascribed to a fast reaction rate of W 6+ to W 5+ . Additionally, in recent studies, WO 3 -incorporated TiO 2 powders revealed higher photocatalytic activity compared to pure TiO 2 for the destruction of certain water and air pollutants with visible light or UV exposure [12,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…To solve these problems, a great deal of techniques have been developed to modify the surface characteristics of TiO 2 [11]. The surface modification of TiO 2 with tungsten trioxide (WO 3 ), which is a narrow-band gap semiconductor (2.4-2.8 eV), is an interesting technique for expanding the light absorbance capability of TiO 2 to the visible range [12,13]. WO 3 can act as an electron acceptor, thus lowering the recombination rate of photoinduced electrons and holes on the surface and bulk spaces of TiO 2 and elevating its photocatalytic activity [14].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

Lee¹,

Jo²

2017

Catalysts

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This study assessed 3D WO 3 -TiO 2 nanoflowers (WTNF) synthesized by a combined hydrothermal-ultrasonication-impregnation method for their applicability to the treatment of aromatic volatile compounds under visible-light illumination. The scanning electron microscopy exhibited the formation of 3D structures in the prepared WTNF samples. The X-ray diffraction patterns and energy dispersive X-ray results indicated a successful incorporation of WO 3 into TNF structures. The UV-visible spectroscopy showed that the prepared WTNF samples can be functioned under visible light irradiation. The output-to-input concentration ratios of toluene and o-xylene with WTNF samples were lower than those of TiO 2 nanoflowers. These findings were illustrated on the basis of charge separation ability, adsorption capability, and light absorption of the sample photocatalysts. The input-to-output concentration ratios of the target chemicals were lowest for 10 M NaOH and highest for 5 M NaOH. The photocatalytic degradation efficiencies of WTNF sample photocatalysts increased with increasing WO 3 content from 0.1% to 1.0%, and dropped gradually with increasing WO 3 content further to 4.0%. Light-emitting-diodes (LEDs) are a more highly energy-efficient light source compared to a conventional lamp for the photocatalytic degradation of toluene and o-xylene, although the photocatalytic activity is higher for the conventional lamp.

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“…The presence of lattice distortion 8,10,12,26,27 in the composite not only facilitates the generation of photoinduced electron-hole pairs, but also postpones their recombination. Its morphology, 8,18 specific surface area, 11,23,28 microstructure, 5,6,8,11,[26][27][28] exposure degree of the active site 13,28 and so on were reported to affect its photocatalytic property. Thus, it is interesting and valuable to integrate some of the aforementioned factors to improve the photocatalytic property of a tungsten trioxide/ titanium dioxide composite.…”

Section: Introductionmentioning

confidence: 99%

“…Coupling with tungsten trioxide (WO 3 ) is regarded as a promising approach to realizing this target. [1][2][3][4][5][6][7][8] Recently, the improvement of the photocatalytic property of a tungsten trioxide/titanium dioxide composite was attributed to the similarity of the band structures of tungsten trioxide and titanium dioxide, 6,9 the separation of photogenerated electron-hole pair in the composite [1][2][3]6,[8][9][10][11][12][13][14][15][16][17][18][19] and the enhanced acidity on its surface. 7,14,20,21 Furthermore, the presence of heterojunctions 1,4,15,[22][23][24] and doping 8,10,12,25,26 in the composite facilitates the separation of photoinduced electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

LiGuohua

ChenJiajia

WuShizhao

et al. 2017

Surface Innovations

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In order to improve the photocatalytic property of a tungsten trioxide (WO 3 )/titanium dioxide (TiO 2 ) composite, a novel structure -that is, a hollow microsphere with a mesoporous wall -was fabricated. The relations between the interior characteristics and the optical, photoelectric and photocatalytic properties of the samples were investigated. The results show that the tungsten (W)/titanium (Ti) ratio and the crystallinity and diameter of the crystallite of the sample determine its optical property. The photoelectric conversion property of the sample is related to its electron ability transfer and optical property. The photocatalytic property of the sample is relevant to its optical property and interior structures, in particular the particle microstructure of the sample, the dispersion of titanium dioxide and tungsten trioxide crystallites and their contact relationship at the mesoscale. In terms of application, it is the hollow microsphere with a mesoporous wall that takes a key role. These set a connection between the property and mesostructure of the sample, which facilitates the adjustment of the property of tungsten trioxide/titanium dioxide composite. Notation

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Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Cited by 141 publications

References 46 publications

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

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Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Cited by 141 publications

References 46 publications

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

The Relationship between the Mesostructure of WO3/TiO2 Hollow Microsphere and its Property

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The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property