Improved visible light photocatalytic activity of titania doped with tin and nitrogen

Wang, Enjun; He, Tao; Zhao, Lizhong; Chen, Yongmei; Cao, Yaán

doi:10.1039/c0jm02539a

Cited by 113 publications

(99 citation statements)

References 53 publications

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“…In contrast, a typical absorption feature of a small bump at around 450 nm in the visible light region is observed in N-TiO 2 , which can be attributed to the electron transition from surface state of NO x species to the conduction band of TiO 2 [45,46]. Also a distinct bump at 450 nm can be seen from the spectrum of Bi-TiO 2 , which can also found in the similar materials [29]. It is suggested that the visible-light absorption of Bi-TiO 2 arises from the electronic transition from valence band to this doping energy level.…”

Section: Characterization Of Photocatalystsmentioning

confidence: 66%

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Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Kang

Yuan

et al. 2011

Catal Lett

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Bi-N-TiO 2 nanoparticles were synthesized via anneal after a simple sol-gel combined hydrothermal method. X-ray diffraction (XRD), UV-Visible diffuse reflectance spectra, Scanning Electron Microscope (SEM) and X-ray photoelectron spectra (XPS) confirm that the grain sizes are almost uniform diameters of about 11 nm, the response to light extends to visible region, the doped ions substitute some of the lattice titanium atoms, and furthermore Bi 3? and Bi 4? ions coexist. The photodegradation of acid orange 7 (AO7) is used to evaluate the photocatalytic activity of the prepared Bi-N-TiO 2 nanoparticles. The experiments indicated that Bi-N-TiO 2 showed higher photocatalytic activity than that of P25, TiO 2 , N-TiO 2 and Bi-TiO 2 in the visible light area and ultraviolet light. The improvement of photocatalytic activity of Bi-N-TiO 2 is more likely because the N doping causes the visible light response and improves the quantum yield and photocatalytic activity of TiO 2 , and Bi doping causes the enhancement of the separation of photogenerated charges.

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Section: Characterization Of Photocatalystsmentioning

confidence: 66%

“…This has been demonstrated in several systems, such as N-Sn [29], N-Fe [30], N-W [31], N-B [32], N-F [33,34], N-Ag [35], N-Pd [36] and N-C-F [37]. Bi-doped TiO 2 photocatalysts are especially concerned with high photocatalytic activities even under visible light in recent several reports [38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 92%

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Kang

Yuan

et al. 2011

Catal Lett

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“…Nevertheless, up to date, there is only indirect experimental evidence for the effects of codoping for PEC water splitting. For example, a number of metal/anion codoping pairs were shown to improve the photocatalytic activities of TiO 2 for organic pollutant decomposition due to enhanced visible-light absorption and charge separation [22][23][24][25][26][27] . Codoping ZnO with (Ga, N) led to highly conductive p-type ZnO film 28 , and improved PEC performance because of enhanced visible-light absorption and crystallinity 29 .…”

mentioning

confidence: 99%

Codoping titanium dioxide nanowires with tungsten and carbon for enhanced photoelectrochemical performance

et al. 2013

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Recent density-functional theory calculations suggest that codoping TiO 2 with donoracceptor pairs is more effective than monodoping for improving photoelectrochemical water-splitting performance because codoping can reduce charge recombination, improve material quality, enhance light absorption and increase solubility limits of dopants. Here we report a novel ex-situ method to codope TiO 2 with tungsten and carbon (W, C) by sequentially annealing W-precursor-coated TiO 2 nanowires in flame and carbon monoxide gas. The unique advantages of flame annealing are that the high temperature (41,000°C) and fast heating rate of flame enable rapid diffusion of W into TiO 2 without damaging the nanowire morphology and crystallinity. This is the first experimental demonstration that codoped TiO 2 :(W, C) nanowires outperform monodoped TiO 2 :W and TiO 2 :C and double the saturation photocurrent of undoped TiO 2 for photoelectrochemical water splitting. Such significant performance enhancement originates from a greatly improved electrical conductivity and activity for oxygen-evolution reaction due to the synergistic effects of codoping.

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“…Titania (TiO 2 ) is one of the most promising photocatalysts for degradation of organic pollutants in water and air due to its high oxidizing ability, photostability, non-toxicity and low cost [1][2][3]. However, the photocatalytic activity of TiO 2 should be further improved for practical application.…”

Section: Introductionmentioning

confidence: 99%

One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light

Yang

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tThe photocatalytic activity of TiO 2 can be mainly improved from three approaches: (1) enhancing the separation efficiency of photoelectrons and holes, (2) enhancing surface energy, and (3) increasing availability of visible light. Here, we report a one-step method to obtain nitrogen and lanthanum co-doped TiO 2 nanosheets with dominant {0 0 1} facets through a hydrothermal process, using TBOT, triethylamine and LaCl 3 ÁnH 2 O as precursor and sources of N, La respectively in HF-HNO 3 mixed aqueous solution, and the samples were characterized by XRD, SEM, TEM, XPS, UV-DRS and BET analyses. The XRD and XPS results confirmed that N was doped into the lattice of anatase TiO 2 , while La was not. N acts as an O-Ti-N structure or interstitial N and La exists as LaF 3 in TiO 2 nanosheets. The SEM and TEM results show that the percentage of {0 0 1} facets in the as-synthesized N,La-TiO 2 nanosheets is estimated to be about 75% on average at R F = 1.0. N,La-TiO 2 nanosheets can absorb visible light due to the red shift in the absorption edges, and compared with N-TiO 2 nanosheets, N and La co-doping can further strengthen the absorption of visible light. N,La-TiO 2 nanosheets exhibited higher photocatalytic activity for photodegradation of Rh B under visible light than pure TiO 2 , N-TiO 2 , La-TiO 2 nanosheets and N,La-TiO 2 nanoparticles. N and La co-doping could produce a synergistic effect. The N doping narrowed the band gap of TiO 2 , while the La doping could improve the separation efficiency of photoelectrons and holes. In addition, the La doping could enhance the adsorption property of photocatalyst for organic pollutants.

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Improved visible light photocatalytic activity of titania doped with tin and nitrogen

Cited by 113 publications

References 53 publications

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Synthesis, Characterization and Photocatalytic Performance of TiO2 Codoped with Bismuth and Nitrogen

Codoping titanium dioxide nanowires with tungsten and carbon for enhanced photoelectrochemical performance

One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light

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