Carbon coating of anatase-type TiO2 and photoactivity

Tsumura, Tomoki; Kojitani, N; Izumi, Ikuichiro; Iwashita, Norio; Toyoda, Masahiro; Inagaki, Michio

doi:10.1039/b201942f

Cited by 235 publications

(125 citation statements)

References 22 publications

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“…Similar results were reported by Tsumura et al [28] and Shanmugam et al [17]. The amount of deposited silver depends on the initial concentration of Ag + as well as the surface area, pore structure and quantity of acidic functional groups that can act as initial active sites for adsorption [4,29].…”

Section: Characterization Of Structure and Morphologysupporting

confidence: 78%

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

Shi

Tan

Chen

et al. 2009

Science and Technology of Advanced Materials

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An environment-friendly hydrothermal method was used to prepare TiO 2 @C core-shell composite using TiO 2 as core and sucrose as carbon source. TiO 2 @C served as a support for the immobilization of Ag by impregnation in silver nitrate aqueous solution. The chemical structures and morphologies of TiO 2 @C and TiO 2 @C/Ag composite were characterized by x-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, energy dispersive x-ray spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The antibacterial properties of the TiO 2 @C/Ag core-shell composite against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were examined by the viable cell counting method. The results indicate that silver supported on the surface of TiO 2 @C shows excellent antibacterial activity.

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Section: Characterization Of Structure and Morphologysupporting

confidence: 78%

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

Shi

Tan

Chen

et al. 2009

Science and Technology of Advanced Materials

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“…The discharge curve (Li intercalation) exhibits two plateaus, the first one at about 2.8 V and the second one at the potential range from 2.4 to 2.0 V. According to the previous report on the in situ XRD analysis, the first plateau is related with an increase of van der Waals gap along the crystallographic b-direction, which is due to the intercalation of solvated Li ions. 11 The second plateau can be indexed to the further intercalation of Li ions, which induces further distortion of [MoO6] octahedra.…”

Section: Resultsmentioning

confidence: 99%

In Situ X-ray Absorption Spectroscopic Study for α-MoO₃Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries

Kang¹,

Paek²

2010

Bulletin of the Korean Chemical Society

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In-situ X-ray absorption spectroscopy (XAS) was used to elucidate the structural variation of α-MoO3 electrode upon discharge/charge reaction in a lithium ion battery. According to the XAS analysis, hexavalent Mo atoms in α-MoO3 framework are reduced as the amount of intercalated lithium ions increases. As lithium de-intercalation proceeds, most of pre-edge peaks are restored again. However, according to the Fourier transforms of the extended X-ray absorption fine structure (EXAFS) spectra, lithium de-intercalation reaction is partially irreversible upon the charge reaction, which is one of the main reasons why the capacity of α-MoO3 electrode decreases upon successive discharge/charge cycles.

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“…Increasing the carbon content decreases the rutile content of the powders, consistent with the results of Inagaki and co-workers. 10,11 The thermogravimetric analysis (TGA) curves (not shown) of the carbon-titania powders showed a slight decrease of 0.5-1 wt.% when heating up the powders from 120 to 800°C under nitrogen atmosphere followed by a rapid weight loss (0.5-52 wt.%, depending on the C-content) when switching the atmosphere to oxygen at 800°C. The former weight loss can be attributed to removal of chemisorbed water, surface OH-groups and any volatile organic compounds, while the latter is directly related to non-volatile carbon (soot) oxidation and removal as CO 2 or CO. 5,16 The sample weight remains constant when further heating the powder to 1000°C, since the TiO 2 surface is free of OH groups at this temperature.…”

Section: Hk Kammler Et Almentioning

confidence: 99%

“…These powders were then transformed to TiC at 1200-1550°C. Another process for coating metal oxide powders with carbon was introduced recently by Inagaki and coworkers, 10,11 heating oxide powders (30-200 m) together with polyvinylchloride for 1 h at about 1000°C. They attributed the observed suppression of anatase to rutile phase transformation to the carbon layer that could prevent crystal growth and sintering.…”

Section: Introductionmentioning

confidence: 99%

Carbon-coated titania nanostructured particles: Continuous, one-step flame-synthesis

Kammler

Pratsinis

2003

J. Mater. Res.

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Concurrent synthesis of titania-carbon nanoparticles (up to 52 wt.% in C) was studied in a diffusion flame aerosol reactor by combustion of titanium tetraisopropoxide and acetylene. These graphitically layered carbon-coated titania particles were characterized by high-resolution transmission electron microscopy (HRTEM), with elemental mapping of C and Ti, x-ray diffraction (XRD), and nitrogen adsorption [Brunauer-Emmett-Teller (BET)]. The specific surface area of the powder was controlled by the acetylene flow rate from 29 to 62 m 2 /g as the rutile content decreased from 68 to 17 wt.%. Light blue titania suboxides formed at low acetylene flow rates. The average XRD crystal size of TiO 2 decreased steadily with increasing carbon content of the composite powders, while the average BET primary particle size calculated from nitrogen adsorption decreased first and then approached a constant value. The latter is attributed to the formation of individual carbon particles next to carbon-coated titania particles as observed by HRTEM and electron spectroscopic imaging.

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Carbon coating of anatase-type TiO2 and photoactivity

Cited by 235 publications

References 22 publications

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

In Situ X-ray Absorption Spectroscopic Study for α-MoO₃Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries

Carbon-coated titania nanostructured particles: Continuous, one-step flame-synthesis

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Carbon coating of anatase-type TiO2 and photoactivity

Cited by 235 publications

References 22 publications

Preparation and properties of antibacterial TiO2@C/Ag core–shell composite

Preparation and properties of antibacterial TiO2@C/Ag core–shell composite

In Situ X-ray Absorption Spectroscopic Study for α-MoO3Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries

Carbon-coated titania nanostructured particles: Continuous, one-step flame-synthesis

Contact Info

Product

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About

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

In Situ X-ray Absorption Spectroscopic Study for α-MoO₃Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries