ChemInform Abstract: EFFECT OF WATER VAPOR ON THE ELECTRICAL CONDUCTIVITY OF TITANIUM DIOXIDE

AbstractThis work shows that the titanium dioxide coatings obtained by low-pressure cold gas spraying with the use of the sol–gel amorphous TiO2 powder are characterized by photocatalytic activity despite their partial amorphous content. Moreover, the research outcome suggests that the decomposition rate of organic pollutants is enhanced after long-term exposure to moisture. The condensation humidity test is not detrimental to the continuity and integrity of the coating, but the phase composition of coatings changes—with the exposure to water vapor, the portion of the amorphous phase crystallizes into brookite. The mechanism responsible for the conversion of amorphous TiO2 into brookite is attributed to the water-driven dissolution and reprecipitation of TiO6 octahedra. It has been shown that an additional parameter necessary for the stabilization of the brookite is the oxygen depletion of the amorphous structure of titanium dioxide. Considering the results presented in this paper and the advantages of a portable, low-pressure cold spray system for industrial applications, it is expected that TiO2 coatings produced from a sol–gel feedstock powder can be further developed and tested as efficient photocatalysts.

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Effect of Water Vapor on Ignition Temperatures of Methane-Air Mixtures

Industrial & Engineering Chemistry ◽

10.1021/ie50289a017 ◽

1934 ◽

Vol 26 (1) ◽

pp. 71-72 ◽

Cited By ~ 3

Author(s):

G. W. Jones ◽

Henry. Seaman

Keyword(s):

Water Vapor ◽

Effect Of Water

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Effect of water vapor on the pyrolysis of the Moroccan (Tarfaya) oil shale

Journal of Analytical and Applied Pyrolysis ◽

10.1016/s0165-2370(98)00108-9 ◽

1999 ◽

Vol 48 (2) ◽

pp. 65-76 ◽

Cited By ~ 36

Author(s):

K. El harfi ◽

A. Mokhlisse ◽

M.Ben Chanâa

Keyword(s):

Water Vapor ◽

Oil Shale ◽

Effect Of Water

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The catalytic effect of water, water dimers and water trimers on H2S +3O2formation by the HO2+ HS reaction under tropospheric conditions

Physical Chemistry Chemical Physics ◽

10.1039/c6cp00654j ◽

2016 ◽

Vol 18 (26) ◽

pp. 17414-17427 ◽

Cited By ~ 19

Author(s):

Tianlei Zhang ◽

Chen Yang ◽

Xukai Feng ◽

Jiaxin Kang ◽

Liang Song ◽

...

Keyword(s):

Water Vapor ◽

Catalytic Effect ◽

Vapor Molecule ◽

Effect Of Water ◽

Water Vapor Molecule ◽

Water Dimers

Catalyst X (X = H2O, (H2O)2and (H2O)3) is incorporated into the channel of H2S +3O2formation and the catalytic effect of water, water dimers and water trimers is mainly taken from the contribution of a single water vapor molecule.

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