W-doped titania nanoparticles for UV and visible-light photocatalytic reactions

Lorret, O.; Francová, Denisa; Waldner, Georg; Stelzer, Nils

doi:10.1016/j.apcatb.2009.05.005

Cited by 89 publications

(59 citation statements)

References 48 publications

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“…In addition, the intensity of diffraction peak (100) of samples somewhat declines along with the increment of titanium additive dosage, attributing to the gradual destruction of long-range ordering of hexagonal pore structure [34] or the variation in electron density of titanium-incorporated materials, similar to tungsten incorporated MCM-41 [35]. A series of prominent diffraction peaks at nearly 25. ion radius of both [16]. In addition, there are no peaks at nearly 20.45 • and 22.83 • in spectra, revealing the absence of solid solution of W x Ti 1 − x O 2 , as reported [36].…”

Section: Resultsmentioning

confidence: 84%

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Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Chang

Wang

Luo

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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h i g h l i g h t s• A series of tungsten-titaniumcocontained SBA15 composites were fabricated by a simple synthetic route.• These samples showed enhanced catalytic performance in comparison to those comprising bare tungsten or titanium component.• The enhancement of photocatalytic behavior under visible-light irradiation was discussed. t r a c tA facile and one-step hydrothermal procedure was adopted to fabricate a series of W-Ti-SBA15 composites (WTS). These as-prepared composites were systematically characterized by a collection of analytic and spectroscopic techniques. It was found that dual phases of titanium and tungsten species coexisted in mesoporous structures of p6 mm hexagonal symmetry. In addition, these composites were visible-light responsive and exhibited enhanced photocatalytic capability toward degradation of Rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) upon visible-light irradiation in comparison to samples containing single component of titanium or tungsten species. Specifically, the best candidate, sample 8%WTS0.7, had the largest apparent reaction rate constant that was nearly 1.2, 2.1, 2.2, and 5.7 times as high as those of 8%WS, TS0.7, WO 3 /TiO 2 , and N-TiO 2 , respectively. The enhancement of photocatalytic performance was mainly attributed to the well-matched band structures of both components and strengthened visiblelight adsorption ability, originating from the combination of titania with highly acidic WO 3 in SBA15 matrix with large specific surface areas. Active radical species were detected by trapping experiments and a possible photocatalytic mechanism was thus proposed.

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Section: Resultsmentioning

confidence: 84%

“…As a result, WO 3 -TiO 2 composites have been extensively investigated for different purpose, particularly for photocatalytic processes [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Chang

Wang

Luo

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…[15,16,24,31,33]. Because of the difficulties in the precise measurement of the size of the primary particles included in the agglomerates, the main particle size of agglomerates was also estimated (31.8 ± 13.4 nm).…”

Section: Optimization Of the Preparation Of The 50ti 07 W 03 O 2 -5mentioning

confidence: 99%

“…Due to its excellent mechanical, chemical and redox stability, low cost, non-toxicity and corrosion resistance in acidic environment, TiO 2 has been widely used for optical coatings, solar cells, photocatalytic water splitting and anti-reflection coatings [1,[14][15]. There are reports on its application as a humidity sensor and high temperature oxygen sensor [16].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

Gubán

Borbáth

Pászti

et al. 2015

Applied Catalysis B: Environmental

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Ti-based electroconductive mixed oxides were deposited onto activated carbon by using three different sol-gel-based multistep synthesis routes. As demonstrated by X-ray diffraction, high crystallinity of the tungsten-loaded rutile was achieved by a sequence of annealing in inert atmosphere at 750°C and a short reductive treatment at 650°C.Formation of the rutile phase on the carbon support before the high temperature treatment has been proved to be the prerequisite for complete W incorporation into the rutile lattice. The structural and compositional properties of the mixed oxides were explored by transmission electron microscopy, temperature programmed reduction and X-ray photoelectron spectroscopy. Anode electrocatalysts were formulated by loading the composite of the activated carbon and the Ti-based electroconductive mixed oxides with 40 wt% Pt. Enhanced CO tolerance along with considerable stability was demonstrated for the electrocatalyst prepared using the Ti 0.7 W 0.3 O 2 -C composite material with high degree of W incorporation.

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“…A wide variety of dopants have been studied including both metallic and non-metallic elements [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Doping of TiO 2 with non-metals (specifically C and N) has attracted significant attention [11, 12, 14, 15, 17-19, 21, 23-25].…”

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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

118

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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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W-doped titania nanoparticles for UV and visible-light photocatalytic reactions

Cited by 89 publications

References 48 publications

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

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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W-doped titania nanoparticles for UV and visible-light photocatalytic reactions

Cited by 89 publications

References 48 publications

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Enhanced visible-light-driven photocatalytic performance of mesoporous W-Ti-SBA-15 prepared through a facile hydrothermal route

Preparation and characterization of novel Ti0.7W0.3O2–C composite materials for Pt-based anode electrocatalysts with enhanced CO tolerance

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