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Niobium dioxide

Niobium Dioxide Fluoride. Niobium dioxide fluoride, Nb02F, is formed on dissolution of niobium pentoxide in 48 wt % aqueous hydrofluoric acid, evaporation of the solution to dryness, and heating to 250°C. [Pg.27]

Niobium is a multivalent metal and forms stable oxides of compositions represented as niobium pentoxide, niobium dioxide, and niobium oxide. The heats of reaction for the reduction of each of these oxides are... [Pg.392]

When treated with aqueous hydrofluoric acid followed by evaporation to dryness, niobium dioxide fluoride, Nb02F [15195-33-2] is formed ... [Pg.634]

Hall and Smith, J. Amer. Chem. Soc., 1905,27, 1389 Proc. Amer. Phil. Soc., 1905, 44, 197. According to Smith and Maas (Zeitsck. anorg. Chem., 1894, 7, 96), the white product is a hydrochloride of niobium dioxide, and has the formula 2Nb02.HC1.3HsO. [Pg.156]

Na202 DISODIUM PEROXIDE 1131 Nb02 NIOBIUM DIOXIDE 1174... [Pg.1913]

When niobium pentoxide is heated with zinc chloride, a blue-black product results, which has the properties of niobium dioxide. [Pg.581]

The photocatalytic N-allg lation of aniline by alcohols has been obtained over Ti02 (see Sec 1.1.1, p. 167). Photocatalitic oxidation of tri-methylamine has been studied in an annular reactor. The selective oxidation of amines to imines with aerial ojgrgen as the ultimate oxidant has been obtained by titania photocatalysis. The oxidation of triethy-lamine over niobium dioxide has been studied spectroscopically and computationally and homo and heterocoupling of benzylamine and alcohols on polycrystalline CdS have been reported. The role of photochemistry in formation and destruction of nitrosodimethylamine has been reviewed. Visible light photooxidative cyclization of amino alchols yields 1,3-oxazines. Various arylamines have been converted into heterocycles in the presence of TiOa nanopowder. ... [Pg.171]

See other pages where Niobium dioxide is mentioned: [Pg.675]    [Pg.27]    [Pg.28]    [Pg.28]    [Pg.204]    [Pg.205]    [Pg.622]    [Pg.631]    [Pg.154]    [Pg.675]    [Pg.257]    [Pg.204]    [Pg.205]    [Pg.23]    [Pg.1174]    [Pg.349]    [Pg.336]    [Pg.512]   
See also in sourсe #XX -- [ Pg.2 , Pg.631 ]

See also in sourсe #XX -- [ Pg.7 , Pg.153 , Pg.154 ]



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